Flat Bar Weight Calculator
According to the dimensions, shape, weight, and allowable deviation specified by GB/t702-2008, the thickness of hot-rolled flat steel typically ranges from 3mm to 60mm, while the width ranges from 10mm to 200mm.
Hot-rolled flat steel can be delivered either according to its actual weight or its theoretical weight, depending on the market specifications.
You can use the following calculator to calculate the weight of flat bar.
Related Tool: Steel Weight Calculator
Flat Bar Weight Chart
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 12×4 | 0.38 | 16×9 | 1.15 | 20×10 | 1.57 | 25×8 | 1.57 |
| 5 | 0.47 | 10 | 1.26 | 22×4 | 0.69 | 9 | 1.77 |
| 6 | 0.57 | 18×4 | 0.57 | 5 | 0.86 | 10 | 1.96 |
| 7 | 0.66 | 5 | 0.71 | 6 | 1.04 | 11 | 2.16 |
| 8 | 0.75 | 6 | 0.85 | 7 | 1.21 | 12 | 2.36 |
| 14×4 | 0.44 | 7 | 0.99 | 8 | 1.38 | 14 | 2.75 |
| 5 | 0.55 | 8 | 1.13 | 9 | 1.55 | 16 | 3.14 |
| 6 | 0.66 | 9 | 1.27 | 10 | 1.73 | 28×3 | 0.66 |
| 7 | 0.77 | 10 | 1.41 | 11 | 1.9 | 4 | 0.88 |
| 8 | 0.88 | 20×4 | 0.63 | 12 | 2.07 | 5 | 1.1 |
| 16×4 | 0.5 | 5 | 0.79 | 25×3 | 0.59 | 6 | 1.32 |
| 5 | 0.63 | 6 | 0.94 | 4 | 0.79 | 7 | 1.54 |
| 6 | 0.75 | 7 | 1.1 | 5 | 0.98 | 8 | 1.76 |
| 7 | 0.88 | 8 | 1.26 | 6 | 1.18 | 9 | 1.98 |
| 8 | 1 | 9 | 1.41 | 7 | 1.37 | 10 | 2.2 |
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 28×11 | 2.42 | 30×16 | 3.77 | 32×18 | 4.52 | 36×20 | 5.65 |
| 12 | 2.64 | 18 | 4.24 | 20 | 5.02 | 40×3 | 0.94 |
| 14 | 3.08 | 20 | 4.71 | 36×3 | 0.85 | 4 | 1.26 |
| 16 | 3.53 | 32×3 | 0.75 | 4 | 1.13 | 5 | 1.57 |
| 16 | 3.53 | 32×3 | 0.75 | 4 | 1.13 | 5 | 1.57 |
| 30×3 | 0.71 | 4 | 1.01 | 5 | 1.41 | 6 | 1.88 |
| 4 | 0.94 | 5 | 1.25 | 6 | 1.69 | 7 | 2.2 |
| 5 | 1.18 | 6 | 1.5 | 7 | 1.97 | 8 | 2.51 |
| 6 | 1.41 | 7 | 1.76 | 8 | 2.26 | 9 | 2.83 |
| 7 | 1.65 | 8 | 2.01 | 9 | 2.51 | 10 | 3.14 |
| 8 | 1.88 | 9 | 2.26 | 10 | 2.82 | 11 | 3.45 |
| 9 | 2.12 | 10 | 2.54 | 11 | 3.11 | 12 | 3.77 |
| 10 | 2.36 | 11 | 2.76 | 12 | 3.39 | 14 | 4.4 |
| 11 | 2.59 | 12 | 3.01 | 14 | 3.95 | 16 | 5.02 |
| 12 | 2.83 | 14 | 3.51 | 16 | 4.52 | 18 | 5.65 |
| 14 | 3.36 | 16 | 4.02 | 18 | 5.09 | 20 | 6.28 |
| 45×3 | 1.06 | 50×4 | 1.57 | 56×5 | 2.2 | 60×6 | 2.83 |
| 4 | 1.41 | 5 | 1.96 | 6 | 2.64 | 7 | 3.3 |
| 5 | 1.77 | 6 | 2.36 | 7 | 3.08 | 8 | 3.77 |
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 6 | 2.12 | 7 | 2.75 | 8 | 3.52 | 9 | 4.24 |
| 7 | 2.47 | 8 | 3.14 | 9 | 3.95 | 10 | 4.71 |
| 8 | 2.83 | 9 | 3.53 | 10 | 4.39 | 11 | 5.18 |
| 9 | 3.18 | 10 | 3.93 | 11 | 4.83 | 12 | 5.65 |
| 10 | 3.53 | 11 | 4.32 | 12 | 5.27 | 14 | 6.59 |
| 11 | 3.89 | 12 | 4.71 | 14 | 6.15 | 16 | 7.54 |
| 12 | 4.24 | 14 | 5.5 | 16 | 7.03 | 18 | 8.48 |
| 14 | 4.95 | 16 | 6.28 | 18 | 7.91 | 20 | 9.42 |
| 16 | 5.65 | 18 | 7.07 | 20 | 8.79 | 63×3 | 1.48 |
| 18 | 6.36 | 20 | 7.85 | 60×3 | 1.41 | 4 | 1.98 |
| 20 | 7.07 | 56×3 | 1.32 | 4 | 1.88 | 5 | 2.47 |
| 50×3 | 1.18 | 4 | 1.76 | 5 | 2.36 | 6 | 2.97 |
| 63×7 | 3.46 | 65×8 | 4.08 | 70×9 | 4.95 | 75×10 | 5.89 |
| 8 | 3.95 | 9 | 4.59 | 10 | 5.5 | 11 | 6.48 |
| 9 | 4.45 | 10 | 5.1 | 11 | 6.04 | 12 | 7.07 |
| 10 | 4.94 | 11 | 5.61 | 12 | 6.59 | 14 | 8.24 |
| 11 | 5.44 | 12 | 6.12 | 14 | 7.69 | 16 | 9.42 |
| 12 | 5.93 | 14 | 7.14 | 16 | 8.79 | 18 | 10.6 |
| 14 | 6.92 | 16 | 8.16 | 18 | 9.89 | 20 | 11.78 |
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 16 | 7.91 | 18 | 9.19 | 20 | 10.99 | 80×3 | 1.88 |
| 18 | 8.9 | 20 | 10.21 | 75×3 | 1.77 | 4 | 2.51 |
| 20 | 9.69 | 70×3 | 1065 | 4 | 2.36 | 5 | 3.14 |
| 65×3 | 1.53 | 4 | 2.2 | 5 | 2.94 | 6 | 3.77 |
| 4 | 2.04 | 5 | 2.75 | 6 | 3.53 | 7 | 4.4 |
| 5 | 2.55 | 6 | 3.3 | 7 | 4.12 | 8 | 5.02 |
| 6 | 3.06 | 7 | 3.85 | 8 | 4.71 | 9 | 5.65 |
| 7 | 3.57 | 8 | 4.4 | 9 | 5.3 | 10 | 6.28 |
| 80×11 | 6.91 | 85×12 | 8.01 | 90×14 | 9.89 | 95×14 | 10.44 |
| 12 | 7.54 | 14 | 9.34 | 16 | 11.3 | 16 | 11.93 |
| 14 | 8.79 | 16 | 10.68 | 18 | 12.72 | 18 | 13.42 |
| 16 | 10.05 | 18 | 12.01 | 20 | 14.13 | 20 | 14.92 |
| 18 | 11.3 | 20 | 12.35 | 30 | 21.2 | 22 | 16.41 |
| 20 | 12.56 | 90×3 | 2.12 | 95×3 | 2.24 | 25 | 18.84 |
| 85×3 | 2 | 4 | 2.83 | 4 | 2.98 | 28 | 20.88 |
| 4 | 2.67 | 5 | 3.53 | 5 | 3.73 | 30 | 22.37 |
| 5 | 3.34 | 6 | 4.24 | 6 | 4.47 | 100×3 | 2.36 |
| 6 | 4 | 7 | 4.95 | 7 | 5.22 | 4 | 3.14 |
| 7 | 4.67 | 8 | 5.65 | 8 | 5.97 | 5 | 3.93 |
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 8 | 5.34 | 9 | 6.36 | 9 | 6.71 | 6 | 4.71 |
| 9 | 6.01 | 10 | 7.07 | 10 | 7.46 | 7 | 5.5 |
| 10 | 6.67 | 11 | 7.77 | 11 | 8.2 | 8 | 6.28 |
| 11 | 7.34 | 12 | 8.48 | 12 | 8.95 | 9 | 7.07 |
| 100×10 | 7.85 | 105×7 | 5.77 | 110×4 | 3.45 | 110×28 | 24.18 |
| 11 | 8.64 | 8 | 6.59 | 5 | 4.32 | 30 | 25.91 |
| 12 | 9.42 | 9 | 7.42 | 6 | 5.18 | 120×3 | 2.83 |
| 14 | 10.99 | 10 | 8.24 | 7 | 6.04 | 4 | 3.77 |
| 16 | 12.56 | 11 | 9.07 | 8 | 6.91 | 5 | 4.71 |
| 18 | 14.13 | 12 | 9.89 | 9 | 7.77 | 6 | 5.65 |
| 20 | 15.7 | 14 | 11.54 | 10 | 8.64 | 7 | 6.59 |
| 22 | 17.27 | 16 | 13.19 | 11 | 9.5 | 8 | 7.54 |
| 25 | 19.63 | 18 | 14.84 | 12 | 10.36 | 9 | 8.48 |
| 28 | 21.98 | 20 | 16.49 | 14 | 12.09 | 10 | 9.42 |
| 30 | 23.55 | 22 | 18.18 | 16 | 13.82 | 11 | 10.36 |
| 105×3 | 2.47 | 25 | 20.61 | 18 | 15.54 | 12 | 11.3 |
| 4 | 3.3 | 28 | 23.08 | 20 | 17.27 | 14 | 13.19 |
| 5 | 4.12 | 30 | 24.73 | 22 | 19 | 16 | 15.07 |
| Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight | Spec. (mm) | Weight |
| kg/m | kg/m | kg/m | kg/m | ||||
| 120×20 | 18.84 | 125×14 | 13.74 | 130×10 | 10.21 | 140×10 | 10.99 |
| 22 | 20.72 | 16 | 15.7 | 11 | 11.23 | 11 | 12.09 |
| 25 | 23.55 | 18 | 17.66 | 12 | 12.25 | 12 | 13.19 |
| 28 | 26.38 | 20 | 19.63 | 14 | 14.29 | 14 | 15.39 |
| 30 | 28.26 | 22 | 21.5 | 16 | 16.33 | 16 | 17.58 |
| 125×3 | 2.94 | 25 | 24.53 | 18 | 18.87 | 18 | 19.78 |
| 4 | 3.93 | 28 | 27.48 | 20 | 20.41 | 20 | 21.98 |
| 5 | 4.91 | 30 | 29.44 | 22 | 22.45 | 150×3 | 3.53 |
| 6 | 5.89 | 130×3 | 3.06 | 140×3 | 3.3 | 4 | 4.71 |
| 7 | 6.67 | 4 | 4.08 | 4 | 4.4 | 5 | 5.89 |
| 8 | 7.85 | 5 | 5.1 | 5 | 5.5 | 6 | 7.07 |
| 9 | 8.83 | 6 | 6.12 | 6 | 6.59 | 7 | 8.24 |
| 10 | 9.81 | 7 | 7.14 | 7 | 7.69 | 8 | 9.42 |
| 11 | 10.79 | 8 | 8.16 | 8 | 8.79 | 9 | 10.6 |
| 12 | 11.78 | 9 | 9.18 | 9 | 9.89 | 10 | 11.78 |
| 150×11 | 12.95 | 150×14 | 16.49 | 150×18 | 21.2 | 150×20 | 23.55 |
| 12 | 14.13 | 16 | 18.84 | Â | |||
What is flat bar?
Flat steel refers to a type of steel with a width of 12-300mm, thickness of 3-60mm, rectangular section, and slightly rounded edges. It can be used as a finished product or as raw material for welded pipes and thin slabs for laminated rolling.
Flat steel is commonly used for making hoop iron, tools, and mechanical parts, as well as for house frame structural components and escalators in buildings.
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