Sheet metal is a commonly used material across various industries such as manufacturing, construction, and more.

However, the thickness of the sheet metal is a key factor that determines its strength, durability, and other characteristics.

This guide offers a comprehensive chart displaying the sheet metal gauges and their equivalent thicknesses in both inches and millimeters.

Whether you are a seasoned metalworker or a hobbyist, this article will assist you in choosing the appropriate gauge for your project.

Additionally, the article highlights that the gauge system is implemented to standardize the thickness of sheet metal, which is critical for industries like construction, automotive, and manufacturing.

The chart serves as a useful reference for individuals who work with sheet metal or need to measure its thickness accurately.

It’s important to note that there is no conversion formula available due to the discrepancy between the gauge scale and inches.

However, you can convert the gauge to inches or metric units using the sheet metal gauge chart provided in the article.

**Standard Steel Gauge Size**

The following data displays the thickness and weight per square foot of standard steel gauge sizes from 3 to 38. The thickness ranges from 0.2391 inches (6.073 mm) for gauge 3 to 0.0060 inches (0.152 mm) for gauge 38.

The weight per square foot ranges from 9.754 pounds (47.624 kg/m²) for gauge 3 to 0.245 pounds (1.195 kg/m²) for gauge 38.

As the gauge number decreases, the thickness and weight per square foot of the steel increase, and conversely, as the gauge number increases, the thickness and weight per square foot decrease.

These standard gauge sizes are widely used in the production of various metal products such as sheet metal and wire, and are crucial to consider for proper material selection and design in various applications.

Gauge 3 has a thickness of 0.2391 in or 6.073 mm and a weight per area of 9.754 lb/ft² or 47.624 kg/m².

Gauge 4 has a thickness of 0.2242 in or 5.695 mm and a weight per area of 9.146 lb/ft² or 44.656 kg/m².

Gauge 5 has a thickness of 0.2092 in or 5.314 mm and a weight per area of 8.534 lb/ft² or 41.668 kg/m².

Gauge 6 has a thickness of 0.1943 in or 4.935 mm and a weight per area of 7.927 lb/ft² or 38.701 kg/m².

Gauge 7 has a thickness of 0.1793 in or 4.554 mm and a weight per area of 7.315 lb/ft² or 35.713 kg/m².

Gauge 8 has a thickness of 0.1644 in or 4.176 mm and a weight per area of 6.707 lb/ft² or 32.745 kg/m².

Gauge 9 has a thickness of 0.1495 in or 3.797 mm and a weight per area of 6.099 lb/ft² or 29.777 kg/m².

Gauge 10 has a thickness of 0.1345 in or 3.416 mm and a weight per area of 5.487 lb/ft² or 26.790 kg/m².

Gauge 11 has a thickness of 0.1196 in or 3.038 mm and a weight per area of 4.879 lb/ft² or 23.822 kg/m².

Gauge 12 has a thickness of 0.1046 in or 2.657 mm and a weight per area of 4.267 lb/ft² or 20.834 kg/m².

Gauge 13 has a thickness of 0.0897 in or 2.278 mm and a weight per area of 3.659 lb/ft² or 17.866 kg/m².

Gauge 14 has a thickness of 0.0747 in or 1.897 mm and a weight per area of 3.047 lb/ft² or 14.879 kg/m².

Gauge 15 has a thickness of 0.0673 in or 1.709 mm and a weight per area of 2.746 lb/ft² or 13.405 kg/m².

Gauge 16 has a thickness of 0.0598 in or 1.519 mm and a weight per area of 2.440 lb/ft² or 11.911 kg/m².

Gauge 17 has a thickness of 0.0538 in or 1.367 mm and a weight per area of 2.195 lb/ft² or 10.716 kg/m².

Gauge 18 has a thickness of 0.0478 in or 1.214 mm and a weight per area of 1.950 lb/ft² or 9.521 kg/m².

Gauge 19 has a thickness of 0.0418 in or 1.062 mm and a weight per area of 1.705 lb/ft² or 8.326 kg/m².

Gauge 20 has a thickness of 0.0359 in or 0.912 mm and a weight per area of 1.465 lb/ft² or 7.151 kg/m².

Gauge 21 has a thickness of 0.0329 in or 0.836 mm and a weight per area of 1.342 lb/ft² or 6.553 kg/m².

Gauge 22 has a thickness of 0.0299 in or 0.759 mm and a weight per area of 1.220 lb/ft² or 5.955 kg/m².

Gauge 23 has a thickness of 0.0269 in or 0.683 mm and a weight per area of 1.097 lb/ft² or 5.358 kg/m².

Gauge 24 has a thickness of 0.0239 in or 0.607 mm and a weight per area of 0.975 lb/ft² or 4.760 kg/m².

Gauge 25 has a thickness of 0.0209 in or 0.531 mm and a weight per area of 0.853 lb/ft² or 4.163 kg/m².

Gauge 26 has a thickness of 0.0179 in or 0.455 mm and a weight per area of 0.730 lb/ft² or 3.565 kg/m².

Gauge 27 has a thickness of 0.0164 in or 0.417 mm and a weight per area of 0.669 lb/ft² or 3.267 kg/m².

Gauge 28 has a thickness of 0.0149 in or 0.378 mm and a weight per area of 0.608 lb/ft² or 2.968 kg/m².

Gauge 29 has a thickness of 0.0135 in or 0.343 mm and a weight per area of 0.551 lb/ft² or 2.689 kg/m².

Gauge 30 has a thickness of 0.0120 in or 0.305 mm and a weight per area of 0.490 lb/ft² or 2.390 kg/m².

Gauge 31 has a thickness of 0.0105 in or 0.267 mm and a weight per area of 0.428 lb/ft² or 2.091 kg/m².

Gauge 32 has a thickness of 0.0097 in or 0.246 mm and a weight per area of 0.396 lb/ft² or 1.932 kg/m².

Gauge 33 has a thickness of 0.0090 in or 0.229 mm and a weight per area of 0.367 lb/ft² or 1.793 kg/m².

Gauge 34 has a thickness of 0.0082 in or 0.208 mm and a weight per area of 0.335 lb/ft² or 1.633 kg/m².

Gauge 35 has a thickness of 0.0075 in or 0.191 mm and a weight per area of 0.306 lb/ft² or 1.494 kg/m².

Gauge 36 has a thickness of 0.0067 in or 0.170 mm and a weight per area of 0.273 lb/ft² or 1.335 kg/m².

Gauge 37 has a thickness of 0.0064 in or 0.163 mm and a weight per area of 0.261 lb/ft² or 1.275 kg/m².

Gauge 38 has a thickness of 0.0060 in or 0.152 mm and a weight per area of 0.245 lb/ft² or 1.195 kg/m².

**Galvanized Steel Gauge Size**

Gauge 8 has a thickness of 0.1681 in or 4.270 mm and a weight per area of 6.858 lb/ft² or 33.482 kg/m².

Gauge 9 has a thickness of 0.1532 in or 3.891 mm and a weight per area of 6.250 lb/ft² or 30.514 kg/m².

Gauge 10 has a thickness of 0.1382 in or 3.510 mm and a weight per area of 5.638 lb/ft² or 27.527 kg/m².

Gauge 11 has a thickness of 0.1233 in or 3.132 mm and a weight per area of 5.030 lb/ft² or 24.559 kg/m².

Gauge 12 has a thickness of 0.1084 in or 2.753 mm and a weight per area of 4.422 lb/ft² or 21.591 kg/m².

Gauge 13 has a thickness of 0.0934 in or 2.372 mm and a weight per area of 3.810 lb/ft² or 18.603 kg/m².

Gauge 14 has a thickness of 0.0785 in or 1.994 mm and a weight per area of 3.202 lb/ft² or 15.636 kg/m².

Gauge 15 has a thickness of 0.0710 in or 1.803 mm and a weight per area of 2.896 lb/ft² or 14.142 kg/m².

Gauge 16 has a thickness of 0.0635 in or 1.613 mm and a weight per area of 2.590 lb/ft² or 12.648 kg/m².

Gauge 17 has a thickness of 0.0575 in or 1.461 mm and a weight per area of 2.346 lb/ft² or 11.453 kg/m².

Gauge 18 has a thickness of 0.0516 in or 1.311 mm and a weight per area of 2.105 lb/ft² or 10.278 kg/m².

Gauge 19 has a thickness of 0.0456 in or 1.158 mm and a weight per area of 1.860 lb/ft² or 9.083 kg/m².

Gauge 20 has a thickness of 0.0396 in or 1.006 mm and a weight per area of 1.615 lb/ft² or 7.888 kg/m².

Gauge 21 has a thickness of 0.0366 in or 0.930 mm and a weight per area of 1.493 lb/ft² or 7.290 kg/m².

Gauge 22 has a thickness of 0.0336 in or 0.853 mm and a weight per area of 1.371 lb/ft² or 6.692 kg/m².

Gauge 23 has a thickness of 0.0306 in or 0.777 mm and a weight per area of 1.248 lb/ft² or 6.095 kg/m².

Gauge 24 has a thickness of 0.0276 in or 0.701 mm and a weight per area of 1.126 lb/ft² or 5.497 kg/m².

Gauge 25 has a thickness of 0.0247 in or 0.627 mm and a weight per area of 1.008 lb/ft² or 4.920 kg/m².

Gauge 26 has a thickness of 0.0217 in or 0.551 mm and a weight per area of 0.885 lb/ft² or 4.322 kg/m².

Gauge 27 has a thickness of 0.0202 in or 0.513 mm and a weight per area of 0.824 lb/ft² or 4.023 kg/m².

Gauge 28 has a thickness of 0.0187 in or 0.475 mm and a weight per area of 0.763 lb/ft² or 3.725 kg/m².

Gauge 29 has a thickness of 0.0172 in or 0.437 mm and a weight per area of 0.702 lb/ft² or 3.426 kg/m².

Gauge 30 has a thickness of 0.0157 in or 0.399 mm and a weight per area of 0.640 lb/ft² or 3.127 kg/m².

Gauge 31 has a thickness of 0.0142 in or 0.361 mm and a weight per area of 0.579 lb/ft² or 2.828 kg/m².

Gauge 32 has a thickness of 0.0134 in or 0.340 mm and a weight per area of 0.547 lb/ft² or 2.669 kg/m².

**Stainless Steel Gauge Size**

The information provided displays the thickness, in inches and millimeters, and weight per square foot, in pounds and kilograms per square meter, of galvanized steel for various gauges ranging from 8 to 32.

As the gauge number decreases, the thickness of the steel increases and the weight per square foot decreases.

Gauge 8 has the greatest thickness and weight per square foot, while gauge 32 has the lowest thickness and weight per square foot.

This data can be useful in determining the appropriate gauge of galvanized steel for specific applications.

Gauge 0000000 has a thickness of 0.5000 in or 12.700 mm and a weight per area of 20.808 lb/ft² or 101.594 kg/m².

Gauge 000000 has a thickness of 0.4686 in or 11.902 mm and a weight per area of 19.501 lb/ft² or 95.213 kg/m².

Gauge 00000 has a thickness of 0.4375 in or 11.113 mm and a weight per area of 18.207 lb/ft² or 88.894 kg/m².

Gauge 0000 has a thickness of 0.4063 in or 10.320 mm and a weight per area of 16.909 lb/ft² or 82.555 kg/m².

Gauge 000 has a thickness of 0.3750 in or 9.525 mm and a weight per area of 15.606 lb/ft² or 76.195 kg/m².

Gauge 00 has a thickness of 0.3438 in or 8.733 mm and a weight per area of 14.308 lb/ft² or 69.856 kg/m².

Gauge 0 has a thickness of 0.3125 in or 7.938 mm and a weight per area of 13.005 lb/ft² or 63.496 kg/m².

Gauge 1 has a thickness of 0.2813 in or 7.145 mm and a weight per area of 11.707 lb/ft² or 57.157 kg/m².

Gauge 2 has a thickness of 0.2656 in or 6.746 mm and a weight per area of 11.053 lb/ft² or 53.966 kg/m².

Gauge 3 has a thickness of 0.2500 in or 6.350 mm and a weight per area of 10.404 lb/ft² or 50.797 kg/m².

Gauge 4 has a thickness of 0.2344 in or 5.954 mm and a weight per area of 9.755 lb/ft² or 47.627 kg/m².

Gauge 5 has a thickness of 0.2187 in or 5.555 mm and a weight per area of 9.101 lb/ft² or 44.437 kg/m².

Gauge 6 has a thickness of 0.2031 in or 5.159 mm and a weight per area of 8.452 lb/ft² or 41.267 kg/m².

Gauge 7 has a thickness of 0.1875 in or 4.763 mm and a weight per area of 7.803 lb/ft² or 38.098 kg/m².

Gauge 8 has a thickness of 0.1719 in or 4.366 mm and a weight per area of 7.154 lb/ft² or 34.928 kg/m².

Gauge 9 has a thickness of 0.1562 in or 3.967 mm and a weight per area of 6.500 lb/ft² or 31.738 kg/m².

Gauge 10 has a thickness of 0.1406 in or 3.571 mm and a weight per area of 5.851 lb/ft² or 28.568 kg/m².

Gauge 11 has a thickness of 0.1250 in or 3.175 mm and a weight per area of 5.202 lb/ft² or 25.398 kg/m².

Gauge 12 has a thickness of 0.1094 in or 2.779 mm and a weight per area of 4.553 lb/ft² or 22.229 kg/m².

Gauge 13 has a thickness of 0.0937 in or 2.380 mm and a weight per area of 3.899 lb/ft² or 19.039 kg/m².

Gauge 14 has a thickness of 0.0781 in or 1.984 mm and a weight per area of 3.250 lb/ft² or 15.869 kg/m².

Gauge 15 has a thickness of 0.0703 in or 1.786 mm and a weight per area of 2.926 lb/ft² or 14.284 kg/m².

Gauge 16 has a thickness of 0.0625 in or 1.588 mm and a weight per area of 2.601 lb/ft² or 12.699 kg/m².

Gauge 17 has a thickness of 0.0562 in or 1.427 mm and a weight per area of 2.339 lb/ft² or 11.419 kg/m².

Gauge 18 has a thickness of 0.0500 in or 1.270 mm and a weight per area of 2.081 lb/ft² or 10.159 kg/m².

Gauge 19 has a thickness of 0.0437 in or 1.110 mm and a weight per area of 1.819 lb/ft² or 8.879 kg/m².

Gauge 20 has a thickness of 0.0375 in or 0.953 mm and a weight per area of 1.561 lb/ft² or 7.620 kg/m².

Gauge 21 has a thickness of 0.0344 in or 0.874 mm and a weight per area of 1.432 lb/ft² or 6.990 kg/m².

Gauge 22 has a thickness of 0.0312 in or 0.792 mm and a weight per area of 1.298 lb/ft² or 6.339 kg/m².

Gauge 23 has a thickness of 0.0281 in or 0.714 mm and a weight per area of 1.169 lb/ft² or 5.710 kg/m².

Gauge 24 has a thickness of 0.0250 in or 0.635 mm and a weight per area of 1.040 lb/ft² or 5.080 kg/m².

Gauge 25 has a thickness of 0.0219 in or 0.556 mm and a weight per area of 0.911 lb/ft² or 4.450 kg/m².

Gauge 26 has a thickness of 0.0187 in or 0.475 mm and a weight per area of 0.778 lb/ft² or 3.800 kg/m².

Gauge 27 has a thickness of 0.0172 in or 0.437 mm and a weight per area of 0.716 lb/ft² or 3.495 kg/m².

Gauge 28 has a thickness of 0.0156 in or 0.396 mm and a weight per area of 0.649 lb/ft² or 3.170 kg/m².

Gauge 29 has a thickness of 0.0141 in or 0.358 mm and a weight per area of 0.587 lb/ft² or 2.865 kg/m².

Gauge 30 has a thickness of 0.0125 in or 0.318 mm and a weight per area of 0.520 lb/ft² or 2.540 kg/m².

Gauge 31 has a thickness of 0.0109 in or 0.277 mm and a weight per area of 0.454 lb/ft² or 2.215 kg/m².

Gauge 32 has a thickness of 0.0102 in or 0.259 mm and a weight per area of 0.424 lb/ft² or 2.073 kg/m².

Gauge 33 has a thickness of 0.0094 in or 0.239 mm and a weight per area of 0.391 lb/ft² or 1.910 kg/m².

Gauge 34 has a thickness of 0.0086 in or 0.218 mm and a weight per area of 0.358 lb/ft² or 1.747 kg/m².

Gauge 35 has a thickness of 0.0078 in or 0.198 mm and a weight per area of 0.325 lb/ft² or 1.585 kg/m².

Gauge 36 has a thickness of 0.0070 in or 0.178 mm and a weight per area of 0.291 lb/ft² or 1.422 kg/m².

Gauge 37 has a thickness of 0.0066 in or 0.168 mm and a weight per area of 0.275 lb/ft² or 1.341 kg/m².

Gauge 38 has a thickness of 0.0062 in or 0.157 mm and a weight per area of 0.258 lb/ft² or 1.260 kg/m².

**Aluminum Gauge Size**

The Aluminum Gauge Size information offers the thickness and weight per square foot of various aluminum gauges.

The gauge size ranges from 000000 to 22, with the thickest being 0.5800 inches or 14.732 mm and the thinnest being 0.0253 inches or 0.643 mm.

The weight per square foot ranges from 8.185 pounds (39.962 kg/m²) for gauge 000000 to 0.0253 pounds (0.123 kg/m²) for gauge 36.

This data can be utilized to determine the suitable gauge size for particular applications.

Gauge 000000 has a thickness of 0.5800 in or 14.732 mm and a weight per area of 8.185 lb/ft² or 39.962 kg/m².

Gauge 00000 has a thickness of 0.5165 in or 13.119 mm and a weight per area of 7.289 lb/ft² or 35.587 kg/m².

Gauge 0000 has a thickness of 0.4600 in or 11.684 mm and a weight per area of 6.492 lb/ft² or 31.694 kg/m².

Gauge 000 has a thickness of 0.4096 in or 10.404 mm and a weight per area of 5.780 lb/ft² or 28.222 kg/m².

Gauge 00 has a thickness of 0.3648 in or 9.266 mm and a weight per area of 5.148 lb/ft² or 25.135 kg/m².

Gauge 0 has a thickness of 0.3249 in or 8.252 mm and a weight per area of 4.585 lb/ft² or 22.386 kg/m².

Gauge 1 has a thickness of 0.2893 in or 7.348 mm and a weight per area of 4.083 lb/ft² or 19.933 kg/m².

Gauge 2 has a thickness of 0.2576 in or 6.543 mm and a weight per area of 3.635 lb/ft² or 17.749 kg/m².

Gauge 3 has a thickness of 0.2294 in or 5.827 mm and a weight per area of 3.237 lb/ft² or 15.806 kg/m².

Gauge 4 has a thickness of 0.2043 in or 5.189 mm and a weight per area of 2.883 lb/ft² or 14.076 kg/m².

Gauge 5 has a thickness of 0.1819 in or 4.620 mm and a weight per area of 2.567 lb/ft² or 12.533 kg/m².

Gauge 6 has a thickness of 0.1620 in or 4.115 mm and a weight per area of 2.286 lb/ft² or 11.162 kg/m².

Gauge 7 has a thickness of 0.1443 in or 3.665 mm and a weight per area of 2.036 lb/ft² or 9.942 kg/m².

Gauge 8 has a thickness of 0.1285 in or 3.264 mm and a weight per area of 1.813 lb/ft² or 8.854 kg/m².

Gauge 9 has a thickness of 0.1144 in or 2.906 mm and a weight per area of 1.614 lb/ft² or 7.882 kg/m².

Gauge 10 has a thickness of 0.1019 in or 2.588 mm and a weight per area of 1.438 lb/ft² or 7.021 kg/m².

Gauge 11 has a thickness of 0.0907 in or 2.304 mm and a weight per area of 1.280 lb/ft² or 6.249 kg/m².

Gauge 12 has a thickness of 0.0808 in or 2.052 mm and a weight per area of 1.140 lb/ft² or 5.567 kg/m².

Gauge 13 has a thickness of 0.0720 in or 1.829 mm and a weight per area of 1.016 lb/ft² or 4.961 kg/m².

Gauge 14 has a thickness of 0.0641 in or 1.628 mm and a weight per area of 0.905 lb/ft² or 4.417 kg/m².

Gauge 15 has a thickness of 0.0571 in or 1.450 mm and a weight per area of 0.806 lb/ft² or 3.934 kg/m².

Gauge 16 has a thickness of 0.0508 in or 1.290 mm and a weight per area of 0.717 lb/ft² or 3.500 kg/m².

Gauge 17 has a thickness of 0.0453 in or 1.151 mm and a weight per area of 0.639 lb/ft² or 3.121 kg/m².

Gauge 18 has a thickness of 0.0403 in or 1.024 mm and a weight per area of 0.569 lb/ft² or 2.777 kg/m².

Gauge 19 has a thickness of 0.0359 in or 0.912 mm and a weight per area of 0.507 lb/ft² or 2.474 kg/m².

Gauge 20 has a thickness of 0.0320 in or 0.813 mm and a weight per area of 0.452 lb/ft² or 2.205 kg/m².

Gauge 21 has a thickness of 0.0285 in or 0.724 mm and a weight per area of 0.402 lb/ft² or 1.964 kg/m².

Gauge 22 has a thickness of 0.0253 in or 0.643 mm and a weight per area of 0.357 lb/ft² or 1.743 kg/m².

Gauge 23 has a thickness of 0.0226 in or 0.574 mm and a weight per area of 0.319 lb/ft² or 1.557 kg/m².

Gauge 24 has a thickness of 0.0201 in or 0.511 mm and a weight per area of 0.284 lb/ft² or 1.385 kg/m².

Gauge 25 has a thickness of 0.0179 in or 0.455 mm and a weight per area of 0.253 lb/ft² or 1.233 kg/m².

Gauge 26 has a thickness of 0.0159 in or 0.404 mm and a weight per area of 0.224 lb/ft² or 1.096 kg/m².

Gauge 27 has a thickness of 0.0142 in or 0.361 mm and a weight per area of 0.200 lb/ft² or 0.978 kg/m².

Gauge 28 has a thickness of 0.0126 in or 0.320 mm and a weight per area of 0.178 lb/ft² or 0.868 kg/m².

Gauge 29 has a thickness of 0.0113 in or 0.287 mm and a weight per area of 0.159 lb/ft² or 0.779 kg/m².

Gauge 30 has a thickness of 0.0100 in or 0.254 mm and a weight per area of 0.141 lb/ft² or 0.689 kg/m².

Gauge 31 has a thickness of 0.0089 in or 0.226 mm and a weight per area of 0.126 lb/ft² or 0.613 kg/m².

Gauge 32 has a thickness of 0.0080 in or 0.203 mm and a weight per area of 0.113 lb/ft² or 0.551 kg/m².

Gauge 33 has a thickness of 0.0071 in or 0.180 mm and a weight per area of 0.100 lb/ft² or 0.489 kg/m².

Gauge 34 has a thickness of 0.0063 in or 0.160 mm and a weight per area of 0.089 lb/ft² or 0.434 kg/m².

Gauge 35 has a thickness of 0.0056 in or 0.142 mm and a weight per area of 0.079 lb/ft² or 0.386 kg/m².

Gauge 36 has a thickness of 0.0050 in or 0.127 mm and a weight per area of 0.071 lb/ft² or 0.345 kg/m².

Gauge 37 has a thickness of 0.0045 in or 0.114 mm and a weight per area of 0.064 lb/ft² or 0.310 kg/m².

Gauge 38 has a thickness of 0.0040 in or 0.102 mm and a weight per area of 0.056 lb/ft² or 0.276 kg/m².

Gauge 39 has a thickness of 0.0035 in or 0.089 mm and a weight per area of 0.049 lb/ft² or 0.241 kg/m².

Gauge 40 has a thickness of 0.0031 in or 0.079 mm and a weight per area of 0.044 lb/ft² or 0.214 kg/m².

**Zinc Gauge Size**

The information displays the thickness and weight per square foot of zinc sheets of different gauges, ranging from 28 to 1.

The thickness of the sheets ranges from 1.0000 inches (25.400 mm) for gauge 28 to 0.0020 inches (0.051 mm) for gauge 1.

The weight per square foot of the sheets ranges from 37.152 pounds (181.392 kg/m²) for gauge 28 to 0.149 pounds (0.726 kg/m²) for gauge 2.

This data is useful in industries where zinc sheets are utilized, such as construction, automotive, and manufacturing, as it enables informed decision-making regarding the suitable gauge for a particular application.

Gauge 28 has a thickness of 1.0000 in or 25.400 mm and a weight per area of 37.152 lb/ft² or 181.392 kg/m².

Gauge 27 has a thickness of 0.5000 in or 12.700 mm and a weight per area of 18.576 lb/ft² or 90.696 kg/m².

Gauge 26 has a thickness of 0.3750 in or 9.525 mm and a weight per area of 13.932 lb/ft² or 68.022 kg/m².

Gauge 25 has a thickness of 0.2500 in or 6.350 mm and a weight per area of 9.288 lb/ft² or 45.348 kg/m².

Gauge 24 has a thickness of 0.1250 in or 3.175 mm and a weight per area of 4.644 lb/ft² or 22.674 kg/m².

Gauge 23 has a thickness of 0.1000 in or 2.540 mm and a weight per area of 3.715 lb/ft² or 18.139 kg/m².

Gauge 22 has a thickness of 0.0900 in or 2.286 mm and a weight per area of 3.344 lb/ft² or 16.325 kg/m².

Gauge 21 has a thickness of 0.0800 in or 2.032 mm and a weight per area of 2.972 lb/ft² or 14.511 kg/m².

Gauge 20 has a thickness of 0.0700 in or 1.778 mm and a weight per area of 2.601 lb/ft² or 12.697 kg/m².

Gauge 19 has a thickness of 0.0600 in or 1.524 mm and a weight per area of 2.229 lb/ft² or 10.884 kg/m².

Gauge 18 has a thickness of 0.0550 in or 1.397 mm and a weight per area of 2.043 lb/ft² or 9.977 kg/m².

Gauge 17 has a thickness of 0.0500 in or 1.270 mm and a weight per area of 1.858 lb/ft² or 9.070 kg/m².

Gauge 16 has a thickness of 0.0450 in or 1.143 mm and a weight per area of 1.672 lb/ft² or 8.163 kg/m².

Gauge 15 has a thickness of 0.0400 in or 1.016 mm and a weight per area of 1.486 lb/ft² or 7.256 kg/m².

Gauge 14 has a thickness of 0.0360 in or 0.914 mm and a weight per area of 1.337 lb/ft² or 6.530 kg/m².

Gauge 13 has a thickness of 0.0320 in or 0.813 mm and a weight per area of 1.189 lb/ft² or 5.805 kg/m².

Gauge 12 has a thickness of 0.0280 in or 0.711 mm and a weight per area of 1.040 lb/ft² or 5.079 kg/m².

Gauge 11 has a thickness of 0.0240 in or 0.610 mm and a weight per area of 0.892 lb/ft² or 4.353 kg/m².

Gauge 10 has a thickness of 0.0200 in or 0.508 mm and a weight per area of 0.743 lb/ft² or 3.628 kg/m².

Gauge 9 has a thickness of 0.0180 in or 0.457 mm and a weight per area of 0.669 lb/ft² or 3.265 kg/m².

Gauge 8 has a thickness of 0.0160 in or 0.406 mm and a weight per area of 0.594 lb/ft² or 2.902 kg/m².

Gauge 7 has a thickness of 0.0140 in or 0.356 mm and a weight per area of 0.520 lb/ft² or 2.539 kg/m².

Gauge 6 has a thickness of 0.0120 in or 0.305 mm and a weight per area of 0.446 lb/ft² or 2.177 kg/m².

Gauge 5 has a thickness of 0.0100 in or 0.254 mm and a weight per area of 0.372 lb/ft² or 1.814 kg/m².

Gauge 4 has a thickness of 0.0080 in or 0.203 mm and a weight per area of 0.297 lb/ft² or 1.451 kg/m².

Gauge 3 has a thickness of 0.0060 in or 0.152 mm and a weight per area of 0.223 lb/ft² or 1.088 kg/m².

Gauge 2 has a thickness of 0.0040 in or 0.102 mm and a weight per area of 0.149 lb/ft² or 0.726 kg/m².

Gauge 1 has a thickness of 0.0020 in or 0.051 mm and a weight per area of 0.074 lb/ft² or 0.363 kg/m².

**Birmingham Gage Size**

The Birmingham Gage Size information displays the thickness of various gauges, ranging from 0000000 to 50.

The thickness is presented in both inches and millimeters. The thickest gauge is 0000000 with a thickness of 0.6666 inches (16.932 mm), and the thinnest gauge is 50 with a thickness of 0.0010 inches (0.025 mm).

This information can be beneficial for industries that require accurate thickness measurements for various applications.

Gauge 0000000 has a thickness of 0.6666 in or 16.932 mm.

Gauge 000000 has a thickness of 0.6250 in or 15.875 mm.

Gauge 00000 has a thickness of 0.5883 in or 14.943 mm.

Gauge 0000 has a thickness of 0.5416 in or 13.757 mm.

Gauge 000 has a thickness of 0.5000 in or 12.700 mm.

Gauge 00 has a thickness of 0.4452 in or 11.308 mm.

Gauge 0 has a thickness of 0.3964 in or 10.069 mm.

Gauge 1 has a thickness of 0.3532 in or 8.971 mm.

Gauge 2 has a thickness of 0.3147 in or 7.993 mm.

Gauge 3 has a thickness of 0.2804 in or 7.122 mm.

Gauge 4 has a thickness of 0.2500 in or 6.350 mm.

Gauge 5 has a thickness of 0.2225 in or 5.652 mm.

Gauge 6 has a thickness of 0.1981 in or 5.032 mm.

Gauge 7 has a thickness of 0.1764 in or 4.481 mm.

Gauge 8 has a thickness of 0.1570 in or 3.988 mm.

Gauge 9 has a thickness of 0.1398 in or 3.551 mm.

Gauge 10 has a thickness of 0.1250 in or 3.175 mm.

Gauge 11 has a thickness of 0.1113 in or 2.827 mm.

Gauge 12 has a thickness of 0.0991 in or 2.517 mm.

Gauge 13 has a thickness of 0.0882 in or 2.240 mm.

Gauge 14 has a thickness of 0.0785 in or 1.994 mm.

Gauge 15 has a thickness of 0.0699 in or 1.775 mm.

Gauge 16 has a thickness of 0.0625 in or 1.588 mm.

Gauge 17 has a thickness of 0.0556 in or 1.412 mm.

Gauge 18 has a thickness of 0.0495 in or 1.257 mm.

Gauge 19 has a thickness of 0.0440 in or 1.118 mm.

Gauge 20 has a thickness of 0.0392 in or 0.996 mm.

Gauge 21 has a thickness of 0.0349 in or 0.886 mm.

Gauge 22 has a thickness of 0.0312 in or 0.792 mm.

Gauge 23 has a thickness of 0.0278 in or 0.706 mm.

Gauge 24 has a thickness of 0.0247 in or 0.627 mm.

Gauge 25 has a thickness of 0.0220 in or 0.559 mm.

Gauge 26 has a thickness of 0.0196 in or 0.498 mm.

Gauge 27 has a thickness of 0.0174 in or 0.442 mm.

Gauge 28 has a thickness of 0.0156 in or 0.396 mm.

Gauge 29 has a thickness of 0.0139 in or 0.353 mm.

Gauge 30 has a thickness of 0.0123 in or 0.312 mm.

Gauge 31 has a thickness of 0.0110 in or 0.279 mm.

Gauge 32 has a thickness of 0.0098 in or 0.249 mm.

Gauge 33 has a thickness of 0.0087 in or 0.221 mm.

Gauge 34 has a thickness of 0.0077 in or 0.196 mm.

Gauge 35 has a thickness of 0.0069 in or 0.175 mm.

Gauge 36 has a thickness of 0.0061 in or 0.155 mm.

Gauge 37 has a thickness of 0.0054 in or 0.137 mm.

Gauge 38 has a thickness of 0.0048 in or 0.122 mm.

Gauge 39 has a thickness of 0.0043 in or 0.109 mm.

Gauge 40 has a thickness of 0.0038 in or 0.097 mm.

Gauge 41 has a thickness of 0.0034 in or 0.086 mm.

Gauge 42 has a thickness of 0.0030 in or 0.076 mm.

Gauge 43 has a thickness of 0.0027 in or 0.069 mm.

Gauge 44 has a thickness of 0.0024 in or 0.061 mm.

Gauge 45 has a thickness of 0.0021 in or 0.053 mm.

Gauge 46 has a thickness of 0.0019 in or 0.048 mm.

Gauge 47 has a thickness of 0.0017 in or 0.043 mm.

Gauge 48 has a thickness of 0.0016 in or 0.041 mm.

Gauge 49 has a thickness of 0.0013 in or 0.033 mm.

Gauge 50 has a thickness of 0.0012 in or 0.030 mm.

Gauge 51 has a thickness of 0.0011 in or 0.027 mm.

Gauge 52 has a thickness of 0.0010 in or 0.024 mm.

## Sheet Metal Gauge Chart (inch, mm)

GAUGE (Ga.) | Steel | Galvanized Steel | Stainless Steel | Aluminum | Electrical Steel |
---|---|---|---|---|---|

in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | |

3 | 0.2391 (6.07) | – | – | – | – |

4 | 0.2242 (5.69) | – | – | – | – |

6 | 0.1943 (4.94) | – | – | 0.162 (4.1) | – |

7 | 0.1793 (4.55) | – | 0.1875 (4.76) | 0.1443 (3.67) | – |

8 | 0.1644 (4.18) | 0.1681 (4.27) | 0.1719 (4.37) | 0.1285 (3.26) | – |

9 | 0.1495 (3.80) | 0.1532 (3.89) | 0.1563 (3.97) | 0.1144 (2.91) | – |

10 | 0.1345 (3.42) | 0.1382 (3.51) | 0.1406 (3.57) | 0.1019 (2.59) | – |

11 | 0.1196 (3.04) | 0.1233 (3.13) | 0.1250 (3.18) | 0.0907 (2.30) | – |

12 | 0.1046 (2.66) | 0.1084 (2.75) | 0.1094 (2.78) | 0.0808 (2.05) | – |

13 | 0.0897 (2.28) | 0.0934 (2.37) | 0.094 (2.4) | 0.072 (1.8) | – |

14 | 0.0747 (1.90) | 0.0785 (1.99) | 0.0781 (1.98) | 0.0641 (1.63) | – |

15 | 0.0673 (1.71) | 0.0710 (1.80) | 0.07 (1.8) | 0.057 (1.4) | – |

16 | 0.0598 (1.52) | 0.0635 (1.61) | 0.0625 (1.59) | 0.0508 (1.29) | – |

17 | 0.0538 (1.37) | 0.0575 (1.46) | 0.056 (1.4) | 0.045 (1.1) | – |

18 | 0.0478 (1.21) | 0.0516 (1.31) | 0.0500 (1.27) | 0.0403 (1.02) | – |

19 | 0.0418 (1.06) | 0.0456 (1.16) | 0.044 (1.1) | 0.036 (0.91) | – |

20 | 0.0359 (0.91) | 0.0396 (1.01) | 0.0375 (0.95) | 0.0320 (0.81) | – |

21 | 0.0329 (0.84) | 0.0366 (0.93) | 0.034 (0.86) | 0.028 (0.71) | – |

22 | 0.0299 (0.76) | 0.0336 (0.85) | 0.031 (0.79) | 0.025 (0.64) | 0.0310 (0.787) |

23 | 0.0269 (0.68) | 0.0306 (0.78) | 0.028 (0.71) | 0.023 (0.58) | 0.0280 (0.711) |

24 | 0.0239 (0.61) | 0.0276 (0.70) | 0.025 (0.64) | 0.02 (0.51) | 0.0250 (0.64) |

25 | 0.0209 (0.53) | 0.0247 (0.63) | 0.022 (0.56) | 0.018 (0.46) | 0.0197 (0.50) |

26 | 0.0179 (0.45) | 0.0217 (0.55) | 0.019 (0.48) | 0.017 (0.43) | 0.0185 (0.47) |

27 | 0.0164 (0.42) | 0.0202 (0.51) | 0.017 (0.43) | 0.014 (0.36) | – |

28 | 0.0149 (0.38) | 0.0187 (0.47) | 0.016 (0.41) | 0.0126 (0.32) | – |

29 | 0.0135 (0.34) | 0.0172 (0.44) | 0.014 (0.36) | 0.0113 (0.29) | 0.0140 (0.35) |

30 | 0.0120 (0.30) | 0.0157 (0.40) | 0.013 (0.33) | 0.0100 (0.25) | 0.011 (0.27) |

31 | 0.0105 (0.27) | 0.0142 (0.36) | 0.011 (0.28) | 0.0089 (0.23) | 0.0100 (0.25) |

32 | 0.0097 (0.25) | – | – | – | – |

33 | 0.0090 (0.23) | – | – | – | 0.009 (0.23) |

34 | 0.0082 (0.21) | – | – | – | – |

35 | 0.0075 (0.19) | – | – | – | – |

36 | 0.0067 (0.17) | – | – | – | 0.007 (0.18) |

37 | 0.0064 (0.16) | – | – | – | – |

38 | 0.0060 (0.15) | – | – | – | 0.005 (0.127) |

## Steel Gauge Chart (Manufacturers’ Standard)

Unit: inch, mm

Gauge No. | Thickness (in. ) | Thickness ( mm) |

7/0 | 0 | — |

6/0 | 0 | — |

5/0 | 0 | — |

4/0 | 0 | — |

3/0 | 0 | — |

2/0 | 0 | — |

1/0 | 0 | — |

1 | — | |

2 | — | |

3 | 0.2391 | 6.0731 |

4 | 0.2242 | 5.6947 |

5 | 0.2092 | 5.3137 |

6 | 0.1943 | 4.9352 |

7 | 0.1793 | 4.5542 |

8 | 0.1644 | 4.1758 |

9 | 0.1495 | 3.7973 |

10 | 0.1345 | 3.4163 |

11 | 0.1196 | 3.0378 |

12 | 0.1046 | 2.6568 |

13 | 0.0897 | 2.2784 |

14 | 0.0747 | 1.8974 |

15 | 0.0673 | 1.7094 |

16 | 0.0598 | 1.5189 |

17 | 0.0538 | 1.3665 |

18 | 0.0478 | 1.2141 |

19 | 0.0418 | 1.0617 |

20 | 0.0359 | 0.9119 |

21 | 0.0329 | 0.8357 |

22 | 0.0299 | 0.7595 |

23 | 0.0269 | 0.6833 |

24 | 0.0239 | 0.6071 |

25 | 0.0209 | 0.5309 |

26 | 0.0179 | 0.4547 |

27 | 0.0164 | 0.4166 |

28 | 0.0149 | 0.3785 |

29 | 0.0135 | 0.3429 |

30 | 0.012 | 0.3048 |

31 | 0.0105 | 0.2667 |

32 | 0.0097 | 0.2464 |

33 | 0.009 | 0.2286 |

34 | 0.0082 | 0.2083 |

35 | 0.0075 | 0.1905 |

36 | 0.0067 | 0.1702 |

37 | 0.0064 | 0.1626 |

38 | 0.006 | 0.1524 |

39 | — | |

40 | — |

## Galvanized Sheet Gauge Chart (inch, mm)

Gauge No. | Thickness (in. mm) | ||
---|---|---|---|

7/0 | (0000000) | — | |

6/0 | (000000) | — | |

5/0 | (00000) | — | |

4/0 | (0000) | — | |

3/0 | (000) | — | |

2/0 | (00) | — | |

1/0 | (0) | — | |

1 | — | ||

2 | — | ||

3 | — | ||

4 | — | ||

5 | — | ||

6 | — | ||

7 | — | ||

8 | 0.1681 | 4.2697 | |

9 | 0.1532 | 3.8913 | |

10 | 0.1382 | 3.5103 | |

11 | 0.1233 | 3.1318 | |

12 | 0.1084 | 2.7534 | |

13 | 0.0934 | 2.3724 | |

14 | 0.0785 | 1.9939 | |

15 | 0.071 | 1.8034 | |

16 | 0.0635 | 1.6129 | |

17 | 0.0575 | 1.4605 | |

18 | 0.0516 | 1.3106 | |

19 | 0.0456 | 1.1582 | |

20 | 0.0396 | 1.0058 | |

21 | 0.0366 | 0.9296 | |

22 | 0.0336 | 0.8534 | |

23 | 0.0306 | 0.7772 | |

24 | 0.0276 | 0.701 | |

25 | 0.0247 | 0.6274 | |

26 | 0.0217 | 0.5512 | |

27 | 0.0202 | 0.5131 | |

28 | 0.0187 | 0.475 | |

29 | 0.0172 | 0.4369 | |

30 | 0.0157 | 0.3988 | |

31 | 0.0142 | 0.3607 | |

32 | 0.0134 | 0.3404 | |

33 | — | ||

34 | — | ||

35 | — | ||

36 | — | ||

37 | — | ||

38 | — | ||

39 | — | ||

40 | — |

## Stainless Steel Gauge Chart (U.S. Standard) (inch, mm)

Gauge No. | Thickness (in. mm) | ||
---|---|---|---|

7/0 | (0000000) | 0.5 | 12.7 |

6/0 | (000000) | 0.46875 | 11.90625 |

5/0 | (00000) | 0.43775 | 11.11885 |

4/0 | (0000) | 0.40625 | 10.31875 |

3/0 | (000) | 0.375 | 9.525 |

2/0 | (00) | 0.34375 | 8.73125 |

1/0 | (0) | 0.3125 | 7.9375 |

1 | 0.28125 | 7.14375 | |

2 | 0.26563 | 6.74688 | |

3 | 0.25 | 6.35 | |

4 | 0.23438 | 5.95313 | |

5 | 0.21875 | 5.55625 | |

6 | 0.20313 | 5.15938 | |

7 | 0.1875 | 4.7625 | |

8 | 0.17188 | 4.36563 | |

9 | 0.15625 | 3.96875 | |

10 | 0.14063 | 3.57188 | |

11 | 0.125 | 3.175 | |

12 | 0.10938 | 2.77813 | |

13 | 0.09375 | 2.38125 | |

14 | 0.07813 | 1.98438 | |

15 | 0.07031 | 1.78594 | |

16 | 0.0625 | 1.5875 | |

17 | 0.05625 | 1.42875 | |

18 | 0.05 | 1.27 | |

19 | 0.04375 | 1.11125 | |

20 | 0.0375 | 0.9525 | |

21 | 0.03438 | 0.87313 | |

22 | 0.03125 | 0.79375 | |

23 | 0.02813 | 0.71438 | |

24 | 0.025 | 0.635 | |

25 | 0.02188 | 0.55563 | |

26 | 0.01875 | 0.47625 | |

27 | 0.01719 | 0.43656 | |

28 | 0.01563 | 0.39688 | |

29 | 0.01406 | 0.35719 | |

30 | 0.0125 | 0.3175 | |

31 | 0.01094 | 0.27781 | |

32 | 0.01016 | 0.25797 | |

33 | 0.00938 | 0.23813 | |

34 | 0.00859 | 0.21828 | |

35 | 0.00781 | 0.19844 | |

36 | 0.00703 | 0.17859 | |

37 | 0.00664 | 0.16867 | |

38 | 0.00625 | 0.15875 | |

39 | — | ||

40 | — |

## Aluminum Gauge Chart (inch, mm)

Gauge No. | Thickness (in. mm) | ||
---|---|---|---|

7/0 | (0000000) | 0.65135 | 16.54439 |

6/0 | (000000) | 0.58005 | 14.73324 |

5/0 | (00000) | 0.51655 | 13.12034 |

4/0 | (0000) | 0.46 | 11.684 |

3/0 | (000) | 0.40964 | 10.40486 |

2/0 | (00) | 0.3648 | 9.26592 |

1/0 | (0) | 0.32486 | 8.25144 |

1 | 0.2893 | 7.34822 | |

2 | 0.25763 | 6.5438 | |

3 | 0.22942 | 5.82727 | |

4 | 0.20431 | 5.18947 | |

5 | 0.18194 | 4.62128 | |

6 | 0.16202 | 4.11531 | |

7 | 0.14428 | 3.66471 | |

8 | 0.12849 | 3.26365 | |

9 | 0.11443 | 2.90652 | |

10 | 0.10189 | 2.58801 | |

11 | 0.09074 | 2.30485 | |

12 | 0.08081 | 2.05252 | |

13 | 0.07196 | 1.82781 | |

14 | 0.06408 | 1.62773 | |

15 | 0.05707 | 1.44953 | |

16 | 0.05082 | 1.29083 | |

17 | 0.04526 | 1.14953 | |

18 | 0.0403 | 1.0237 | |

19 | 0.03589 | 0.91161 | |

20 | 0.03196 | 0.81181 | |

21 | 0.02846 | 0.72293 | |

22 | 0.02535 | 0.64381 | |

23 | 0.02257 | 0.5733 | |

24 | 0.0201 | 0.51054 | |

25 | 0.0179 | 0.45466 | |

26 | 0.01594 | 0.40488 | |

27 | 0.0142 | 0.36055 | |

28 | 0.01264 | 0.32108 | |

29 | 0.01126 | 0.28593 | |

30 | 0.01003 | 0.25464 | |

31 | 0.00893 | 0.22677 | |

32 | 0.00795 | 0.20193 | |

33 | 0.00708 | 0.17983 | |

34 | 0.0063 | 0.16012 | |

35 | 0.00561 | 0.1426 | |

36 | 0.005 | 0.127 | |

37 | 0.00445 | 0.11311 | |

38 | 0.00397 | 0.10071 | |

39 | 0.00353 | 0.08969 | |

40 | 0.00314 | 0.07986 |

## Brass Gauge Chart (Brown & Sharpe) (inch, mm)

Gauge No. | Thickness (in. mm) | ||
---|---|---|---|

7/0 | (0000000) | 0.65135 | 16.54439 |

6/0 | (000000) | 0.58005 | 14.73324 |

5/0 | (00000) | 0.51655 | 13.12034 |

4/0 | (0000) | 0.46 | 11.684 |

3/0 | (000) | 0.40964 | 10.40486 |

2/0 | (00) | 0.3648 | 9.26592 |

1/0 | (0) | 0.32486 | 8.25144 |

1 | 0.2893 | 7.34822 | |

2 | 0.25763 | 6.5438 | |

3 | 0.22942 | 5.82727 | |

4 | 0.20431 | 5.18947 | |

5 | 0.18194 | 4.62128 | |

6 | 0.16202 | 4.11531 | |

7 | 0.14428 | 3.66471 | |

8 | 0.12849 | 3.26365 | |

9 | 0.11443 | 2.90652 | |

10 | 0.10189 | 2.58801 | |

11 | 0.09074 | 2.30485 | |

12 | 0.08081 | 2.05252 | |

13 | 0.07196 | 1.82781 | |

14 | 0.06408 | 1.62773 | |

15 | 0.05707 | 1.44953 | |

16 | 0.05082 | 1.29083 | |

17 | 0.04526 | 1.14953 | |

18 | 0.0403 | 1.0237 | |

19 | 0.03589 | 0.91161 | |

20 | 0.03196 | 0.81181 | |

21 | 0.02846 | 0.72293 | |

22 | 0.02535 | 0.64381 | |

23 | 0.02257 | 0.5733 | |

24 | 0.0201 | 0.51054 | |

25 | 0.0179 | 0.45466 | |

26 | 0.01594 | 0.40488 | |

27 | 0.0142 | 0.36055 | |

28 | 0.01264 | 0.32108 | |

29 | 0.01126 | 0.28593 | |

30 | 0.01003 | 0.25464 | |

31 | 0.00893 | 0.22677 | |

32 | 0.00795 | 0.20193 | |

33 | 0.00708 | 0.17983 | |

34 | 0.0063 | 0.16012 | |

35 | 0.00561 | 0.1426 | |

36 | 0.005 | 0.127 | |

37 | 0.00445 | 0.11311 | |

38 | 0.00397 | 0.10071 | |

39 | 0.00353 | 0.08969 | |

40 | 0.00314 | 0.07986 |

## FAQs About Sheet Metal Gauge Thickness

### What is sheet metal gauge?

Gauge, commonly known as the American term, is a unit of measurement for diameter that originated in North America and is part of the Browne & Sharpe measurement system.

The gauge number is larger, the diameter is smaller. It is also utilized to denote thickness after standardization.

In simpler terms, sheet metal gauge refers to the “thickness of sheet metal”.

The higher the number, the sheet metal is thinner, and vice versa, the lower the number, the greater the sheet metal thickness.

For instance, 8-gauge sheet metal is thicker than 16-gauge sheet metal.

Gauges are not tied to standard measurement systems and are used to measure the thickness of sheet metal in inches or millimeters.

There are various measurement systems currently in use, and the values obtained vary based on the type of metal being used.

The standard range of sheet metal gauges ranges from 30 for the thinnest to 7 for the thickest.

When customizing metal parts, your metal manufacturer will consult the steel gauge chart.

When purchasing steel, it is crucial to verify the actual thickness with your supplier, especially if you are receiving polished or treated materials.

You can refer to the sheet metal gauge table for the exact thickness of the sheet metal.

### How to read sheet metal gauge chart?

As shown in the sheet metal gauge table, the gauge number corresponds to the thickness in inches and millimeters respectively.

It is essential to note that various metal materials correspond to different thickness values.

For example, a 16-gauge sheet metal made of steel would measure 0.0598 inches (1.5189 mm), while a 16-gauge sheet metal made of galvanized steel would measure 0.0635 inches (1.6129 mm).

### The history of gauge

The use of “GAUGE” as a measure of thickness dates back to the early days of the American Industrial Revolution.

Wire makers sought a way to quantify their products and the gravimetric method was the simplest solution.

However, this method created difficulties when buyers ordered a specific amount of wire without specifying the diameter.

To address this issue, wire craftsmen started to report the diameter based on the number of times the wire was drawn. This is the origin of the GAUGE measurement system.

Because each drawing reduced the diameter of the wire, the more times it was drawn, the smaller the diameter of the wire. As a result, the larger the GAUGE number, the smaller the diameter of the corresponding wire.

Steel mills eventually adopted a similar approach when rolling plates as it was easier to weigh than to measure the thickness.

Steel plates could be sold based on the unit area weight, with the thinner plates weighing less per square foot.

Steel mills found it convenient to specify the thickness of their steel plates using the GAUGE number system, which was based on the GAUGE number system used by the wire industry.

The origins of the GAUGE number system were influenced by the level of industrial development at the time.

In the 18th and 19th centuries, industrial standards in the United States were largely nonexistent, so each manufacturer had to develop its own standards.

Over time, these standards became more consistent, and the unified standard wire gauge (SWG), steel sheet material manufacturer’s standard gauge (MSG), and non-ferrous metals’ American Wire Gauge (AWG) were established.

**Related reading:** Ferrous vs Non-ferrous Metals

Wire craftsmen aimed to reduce the cross-section of the wire as quickly as possible, but due to the limitations of material deformation, the amount of diameter reduction in a single pass was limited.

Over time, the wire industry determined the optimal number of times required for wire drawing, resulting in the exponential decay curve seen in GAUGE numbers.

It is important to note that the same GAUGE number may correspond to different thickness values for different metals.

For example, 21 gauge corresponds to a standard steel thickness of 0.0329 inches (0.84mm), while it corresponds to a galvanized steel thickness of 0.0366 inches (0.93mm) and an aluminum thickness of 0.028 inches (0.71mm).

It is important to verify the actual thickness with your supplier, especially if you are receiving polished or treated materials.

The same gauge value will correspond to different thickness values for different metals. This is because the properties and characteristics of different metals affect their ability to be drawn or formed into a specific gauge size.

For example, 21 gauge corresponds to a thickness of 0.0329 inches (0.84mm) for standard steel, 0.0366 inches (0.93mm) for galvanized steel, and 0.028 inches (0.71mm) for aluminum.

It is important to consider the type of metal being used when determining the appropriate gauge for a specific application, as this will affect the final thickness and weight per unit area of the material.

**What thicness is ****7**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 7 gauge.

The 7 gauge steel thickness is 0.1793″ and 4.5542mm;

The 7 gauge stainess steel thickness is 0.1875″ and 4.7625mm;

The 7 gauge aluminum thickness is 0.14428″ and 3.66471mm;

The 7 gauge brass thickness is 0.14428″ and 3.66471mm;

**What thickness is 1****0**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 10 gauge.

The 10 gauge steel thickness is 0.1345″ and 3.4163mm;

The 10 gauge galvanized sheet thickness is 0.1382″ and 3.5103mm;

The 10 gauge stainess steel thickness is 0.14063″ and 3.57188mm;

The 10 gauge aluminum thickness is 0.10189″ and 2.58801mm;

The 10 gauge brass thickness is 0.10189″ and 2.58801mm;

**What thickness is 1****1**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 11 gauge.

The 11 gauge steel thickness is 0.1196″ and 3.0378mm;

The 11 gauge galvanized sheet thickness is 0.1233″ and 3.1318mm;

The 11 gauge stainess steel thickness is 0.125″ and 3.175mm;

The 11 gauge aluminum thickness is 0.09074″ and 2.30485mm;

The 11 gauge brass thickness is 0.09074″ and 2.30485mm;

**What thickness is 1****3**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 13 gauge.

The 13 gauge steel thickness is 0.0897″ and 2.2784mm;

The 13 gauge galvanized sheet thickness is 0.0934″ and 2.3724mm;

The 13 gauge stainess steel thickness is 0.09375″ and 2.38125mm;

The 13 gauge aluminum thickness is 0.07196″ and 1.82781mm;

The 13 gauge brass thickness is 0.07196″ and 1.82781mm;

**What thickness is 1****4**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 14 gauge.

The 14 gauge steel thickness is 0.0747″ and 1.8974mm;

The 14 gauge galvanized sheet thickness is 0.0785″ and 1.9939mm;

The 14 gauge stainess steel thickness is 0.07813″ and 1.98438mm;

The 14 gauge aluminum thickness is 0.06408″ and 1.62773mm;

The 14 gauge brass thickness is 0.06408″ and 1.62773mm;

**What thickness is 1****6**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 16 gauge.

The 16 gauge steel thickness is 0.0598″ and 1.5189mm;

The 16 gauge galvanized sheet thickness is 0.0635″ and 1.6129mm;

The 16 gauge stainess steel thickness is 0.0625″ and 1.5875mm;

The 16 gauge aluminum thickness is 0.05082″ and 1.29083mm;

The 16 gauge brass thickness is 0.05082″ and 1.29083mm;

**What thickness is 1****8**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 18 gauge.

The 18 gauge steel thickness is 0.0478″ and 1.2141mm;

The 18 gauge galvanized sheet thickness is 0.0516″ and 1.3106mm;

The 18 gauge stainess steel thickness is 0.05″ and 1.27mm;

The 18 gauge aluminum thickness is 0.0403″ and 1.0237mm;

The 18 gauge brass thickness is 0.0403″ and 1.0237mm;

**What thickness is ****20**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 20 gauge.

The 20 gauge steel thickness is 0.0359″ and 0.9119mm;

The 20 gauge galvanized sheet thickness is 0.0396″ and 1.0058mm;

The 20 gauge stainess steel thickness is 0.0375″ and 0.9525mm;

The 20 gauge aluminum thickness is 0.03196″ and 0.81181mm;

The 20 gauge brass thickness is 0.03196″ and 0.81181mm;

**What thickness is ****22**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 22 gauge.

The 22 gauge steel thickness is 0.0299″ and 0.7595mm;

The 22 gauge galvanized sheet thickness is 0.0336″ and 0.8534mm;

The 22 gauge stainess steel thickness is 0.03125″ and 0.79375mm;

The 22 gauge aluminum thickness is 0.02535″ and 0.64381mm;

The 22 gauge brass thickness is 0.02535″ and 0.64381mm;

**What thickness is ****24**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 24 gauge.

The 24 gauge steel thickness is 0.0239″ and 0.6071mm;

The 24 gauge galvanized sheet thickness is 0.0276″ and 0.701mm;

The 24 gauge stainess steel thickness is 0.025″ and 0.635mm;

The 24 gauge aluminum thickness is 0.0201″ and 0.51054mm;

The 24 gauge brass thickness is 0.0201″ and 0.51054mm;

**What thickness is ****26**** gauge?**

Listed below are the inch thickness and mm thickness corresponding to 26 gauge.

The 26 gauge steel thickness is 0.0179″ and 0.4547mm;

The 26 gauge galvanized sheet thickness is 0.0217″ and 0.5512mm;

The 26 gauge stainess steel thickness is 0.01875″ and 0.47625mm;

The 26 gauge aluminum thickness is 0.01594″ and 0.40488mm;

The 26 gauge brass thickness is 0.01594″ and 0.40488mm;

## FAQs

**1. What is sheet metal gauge? **

A: Sheet metal gauge is a standardized system used to measure the thickness of sheet metal. It provides a numerical value, called the gauge number, that corresponds to a specific thickness. The gauge system is primarily used in the United States, while other regions often use millimeters or inches for measuring sheet metal thickness.

**2. How does the sheet metal gauge system work? **

A: The sheet metal gauge system works by assigning a gauge number to a specific thickness of sheet metal. Generally, the higher the gauge number, the thinner the metal. The gauge numbers and corresponding thicknesses vary depending on the material, such as steel, aluminum, brass, or copper.

**3. Why is it important to know the sheet metal gauge thickness? **

A: Knowing the sheet metal gauge thickness is essential for various applications in manufacturing, fabrication, and construction. It helps determine material properties such as strength, weight, and flexibility. It also ensures compatibility with other components, proper fit and function, and adherence to industry standards and regulations.

**4. How do I convert sheet metal gauge to thickness in inches or millimeters? **

A: To convert sheet metal gauge to thickness in inches or millimeters, you can use a conversion chart or an online calculator. A conversion chart lists the gauge numbers and their corresponding thicknesses in inches and millimeters for different materials. An online calculator allows you to input the gauge number and material type to obtain the thickness in your desired unit of measurement.

**5. Can the same gauge number have different thicknesses for different materials? **

A: Yes, the same gauge number can have different thicknesses for different materials. For example, a 16-gauge steel sheet will have a different thickness than a 16-gauge aluminum sheet. This is because each material has a unique set of properties, and the gauge system is adjusted accordingly.

**6. How does sheet metal thickness affect fabrication processes? **

A: Sheet metal thickness directly impacts various fabrication processes, such as cutting, bending, forming, and welding. For instance, thicker materials typically require more force and energy for cutting and bending. Additionally, certain processes like deep drawing or press braking have limitations based on the material thickness. It is essential to consider these factors when selecting the appropriate thickness for your project.

**7. What are common sheet metal thicknesses used in fabrication? **

A: Common sheet metal thicknesses used in fabrication vary depending on the material and application. For example, common steel sheet thicknesses range from 30 gauge (0.012 inches or 0.305 mm) to 7 gauge (0.1793 inches or 4.55 mm). Aluminum sheets often range from 40 gauge (0.0031 inches or 0.079 mm) to 4 gauge (0.2242 inches or 5.69 mm). The specific thickness required depends on the material properties, design requirements, and fabrication processes involved in a given project.

**8. How do I choose the right sheet metal thickness for my project? **

A: To choose the right sheet metal thickness for your project, you should consider factors such as material type, required strength, weight, flexibility, and fabrication processes. You may also need to adhere to industry standards, building codes, and regulations. Consulting with a professional engineer or fabricator can help ensure that you select the appropriate thickness for your specific application.

Abu hamza alnaserThank you very much. It is clear now about steel.

But how i can get the thickness for aluminum sheet.

MachineMfgYou can check out the aluminum thickness chart in this article.

Zairul Hazreek Ya'acobI bookmarked it and even printed it hardcopy for easy future reference

Mehul raoSir i don’t know how to convert gauge to point in copper cercal plz give me idea

tapanhow gauge to mm is different for different material

MachineMfgwe will soon update this article with the history of gauge, then you will understand, so stay tuned.

PSdesignThis is the best explanation of gauges I’ve ever seen. Just when I would think I understood this, I’d end up questioning everything all over again, which is how I ended up here. So, thank you for the “Okay, NOW I get it!” moment! Makes perfect sense why it made no sense before, because it’s subjective, like lots of other American empirical systems. Again, thanks so much!

Steve SurridgeThank you for the informative information.

But surely the most logical solution is for the US & Canada to change to the metric system?

The UK & Europe have been metricated since 1969.

This would surely save a lot of messing around as there are different thickness for different materials with the same gauge.

Eric PalmerThe US is metric, and has been since the beginning of the metric system. Prior to the invention of the metric system the world was in chaos, with dozens of strange and incompatible and incommensurable systems of measurement in use. None of them were well-defined. Many countries, including the United States, saw the need in both commerce and in science for a single well-thought-out system of measurement. It took a long time, (France began working on it before 1700) but eventually a far superior system of weights and measures was worked out and entered into by treaty.

In 1875, an international agreement, known as the Convention of the Metre, set up well defined metric standards for length and mass and established permanent mechanisms [commitees] to recommend and adopt further refinements in the metric system. This agreement, commonly called the ‘Treaty of the Meter’ in the United States, was signed by 17 countries, including the United States.

So it can be said with complete correctness that the United States has always been “metric.” (The one unresolved dispute is the American insistence on using “.” as a decimal mark, whereas the Europeans prefer a “,” .)

Why, then, is the U.S. civilian population still using the inch-pound and statute mile systems of units, when the rest of the world, including the United Kingdom, has converted to metric? Because American businesses three generations ago didn’t want to go to the expense of re-tooling, the American people two generations ago believed rumors (that the metric system was a subversive European plot) instead of looking at the science, and their legislators were not willing to force the issue. Still, among scientists, the metric system is used almost exclusively. It is simply better. All the “English” units are now defined in terms of metric primary standards. So for the public it will take longer, but we will get there. Nobody is forced to do anything they don’t want to. Get used to it at your own pace, but familiarity with all systems now in use will be an advantage to you.

John JoyceSo, if I follow you correctly regarding how Gauge originated, the reason that the thickness of a given Gauge of different metals varies is a result of the different physical properties of a given metal. That is, how much of a size reduction can be made in a given pass through a die. As gold is an extremely ductile metal, I would expect that for a given wire diameter the Gauge of a gold wire would be less than for the same given diameter of an iron wire. That is the numeric value of the Gauge thickness of a gold wire would be smaller than for an equivalent diameter iron wire because you can have a greater diameter reduction with gold wire for a given draw because it is much more ductile than iron. Am I following your logic correctly or have I gone astray somewhere?

If the Gauge is determined by the number of pulls, wouldn’t that mean that the diameter of different steel alloy compositions for the same Gauge would vary or has the use of Gauge now separated from the number of draws and that for a type of material, such as iron or steel over a fairly broad alloy range, the same thickness is assigned a “standard” Gauge number, even if the reality was that it might require a significant difference in the number of draws to get to the same diameter?

Also, is the starting diameter of a stock rod standard over different metals? If it is not, then what is a Gauge value of zero. That is, it hasn’t been drawn at all? If you don’t have a standard starting diameter, it would seem that the same Gauge number could correspond to vastly different thicknesses depending on the diameter of your starting stock.

Sorry, I’m not trying to be picky, as this was an informative post. I just find it fascinating and want to make sure that I correctly understand how this scale was developed and used.

Thanks,

John