Calculate Steel Weight for 30 Metals: Formula & Calculator

I. How to Calculate Steel & Metal Weight?

Density-Based Formula

The following weight calculation formula can be used to calculate the steel/metal weight:

Weight (kg) = Sectional Area (mm2) × Length (m) × Density (ρ, g/cm3)× 1/1000

Above is the formula to calculate the steel weight in kg.

Calculate Steel & Metal Weight

Determination of Density

For the metal density, you can also refer to the following:

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Simple Steel Weight Formulas

Simply enter data indicated (Decimal Inches), move from left to right making computations by factors as shown.

  • ROUND Diameter x Diameter x 2.6729 = Lbs. Per Foot 
  • FLAT Thickness x Width x 3.4032 = Lbs. Per Foot 
  • SQUARE Diameter x Diameter x 3.4032 = Lbs. Per Foot 
  • HEXAGON *Diameter x Diameter x 2.9437 = Lbs. Per Foot 
  • OCTAGON *Diameter x Diameter x 2.8193 = Lbs. Per Foot 
  • PIPE Actual O.D. – Wall x Wall x 10.68 = Lbs. Per Foot
  • TUBE O.D. – Wall  x Wall  x 10.68 = Lbs. Per Foot  
  • SHEET Thickness  x Width  x  Length  x  .2904 = Lbs. Each
  • COIL O.D. x O.D.  – I.D.  x I.D. x .2223 = Lbs. Per Inch of Width 
  • SHEET CIRCLE Diameter x  Diameter x  Thickness x  .228 = Lbs. Each
  • PLATE Thickness  x  Width  x  Length x  .2836 = Lbs. Each

PLATE SHAPES:

  • CIRCLE Diameter x  Diameter x  Thickness  x  .2227 = Lbs. Each
  • RING Diameter x Diameter – I.D. x I.D. x Thickness x .2227 = Lbs. Each
  • CIRCLE SECTOR    Radius x Radius x Number of Degrees in Arc x Thickness  x  .0025 = Lbs. Each
  • TRIANGLE (Right Angle) Base Length  x  Height  x Thickness  x  .1418 = Lbs. Each
  • TRAPEZOIDS (2 Sides Parallel) Side “A”  + Side “B”  x Height x Thickness  x 14.18 = Lbs.Each
  • HEXAGON (Equal Sides) Side Length  x  Side Length x  .7367 = Lbs. Each
  • OCTAGON Side Length  x  Side Length  x  1.3692 = Lbs. Each

NOTE: Formulas Are Based on Nominal Weights at .2836 Lbs. Per Cubic Inch and Should Be Considered Approximations Only Rather Than Actual Scale Weight.

Weights of Various Metals in Pounds Per *Cubic Foot

Aluminum168.48Copper559.87
Antimony419.99Gold1206.83
Beryllium113.7Gun Metal (Aver.)544
Bismuth611Iridium1396
Brass (Approx.)535.68Iron491.09
Bronze, Alum.481Iron, Cast Grey442
Bronze (Approx.)541Iron,Wrought480
Cadmium540.86Iron, Slag172
Chromium428Lead707.96
Cobalt552.96Magnesium108.51
Manganese463.1Silver654.91
Mercury849Stainless Steel (18-8)494.21
Molybdenum637.63Steel, Cast/Rolled490
Monel Metal556Tin455.67
Nickel555.72Titanium283.39
Osmium1402Tungsten1204.41
Palladium712Vanadium374.97
Platinum1339.2Zinc445.3
Rhodium755*1728 CU. IN. PER CU. FT.
Ruthenium765

II. Steel & Metal Weight Calculator

To assist you in calculating the weight of various metals and steels, including MS plate, GI sheet, structural steel, MS angle, mild steel, steel bar, square tube, angle, and aluminum, we have created a Steel Weight Calculator and Metal Weight Calculator to help you determine the weight of metals in different shapes.

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III. Calculation of Theoretical Steel Weight

The unit of measurement for calculating the theoretical weight of steel is kilograms (kg). The basic formula is:

W (Weight, kg) = F (Cross-sectional Area, mm²) × L (Length, m) × ρ (Density, g/cm³) × 1/1000

The density of steel is: 7.85g/cm³

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 1

Steel Plate weight calculation formula

• Formula: length(m)×width(m)×thickness(mm)×7.85
• E.g: 6m (length)×1.51m(width)×9.75mm (thickness)
• Calculation: 6×1.51×9.75×7.85=693.43kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 2

Steel Pipe weight calculation formula

• Formula: (OD-wall thickness)×wall thickness(mm)×length(m)×0.02466
• E.g: 114mm(OD)×4mm(wall thickness)×6m(length)
• Calculation: (114-4)×4×6×0.02466=65.102kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 3

Steel Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00617
• E.g: Φ20mm (dia.)×6m(length)
• Calculation: 20×20×6×0.00617=14.808kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 4

Square Steel weight calculation formula

• Formula: side width(mm)×side width(mm)×length(m)×0.00785
• E.g: 50mm(side width)×6m(length)
• Calculation: 50×50×6×0.00785=117.75(kg)

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 5

Flat Steel weight calculation formula

• Formula: side width(mm)×thickness(mm)×length(m)×0.00785
• E.g: 50mm(side width)×5.0mm(thickness)×6m(length)
• Calculation: 50×5×6×0.00785=11.775(kg)

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 6

Hexagonal Steel weight calculation formula

• Formula: side-to-side dia.×side-to-side dia.× length(m)×0.0068
• E.g: 50mm(dia.)×6m (length)
• Calculation: 50×50×6×0.0068=102(kg)

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 7

Rebar weight calculation formula

• Formula: dia.mm×dia.mm×length(m)×0.00617
• E.g: Φ20mm(dia.)×12m(length)
• Calculation: 20×20×12×0.00617=29.616kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 8

Flat Steel Tube weight calculation formula

• Formula: (side length+side width)×2×thickness×length(m)×0.00785
• E.g: 100mm×50mm×5mm(thickness)×6m (length)
• Calculation: (100+50)×2×5×6×0.00785=70.65kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 9

Rectangular Steel Tube weight calculation formula

• Formula: side width(mm)×4×thickness×length(m)×0.00785
• E.g: 50mm×5mm (thickness)×6m(length)
• Calculation: 50×4×5×6×0.00785=47.1kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 10

Equal-leg Angle Steel weight calculation formula

• Formula: (side width×2-thickness)×thickness×length(m)×0.00785
• E.g: 50mm×50mm×5(thickness)×6m(length)
• Calculation: (50×2-5)×5×6×0.00785=22.37kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 11

Unequal-leg Angle Steel weight calculation formula

• Formula: (side width+side width-thickness)×thickness×length(m)×0.0076
• E.g: 100mm×80mm×8(thickness)×6m(length)
• Calculation: (100+80-8)×8×6×0.0076=62.746kg

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 12

Brass Pipe weight calculation formula

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.0267

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 13

Copper Pipe weight calculation formula

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.02796

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 15

Brass Pipe weight calculation formula

• Formula: thickness(mm)×(O.D-thickness)×length(m)×0.0267

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 16

Copper Sheet weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.0089

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 17

Zinc Plate weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.0072

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 18

Lead Sheet weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.01137

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 19

Octagonal Steel weight calculation formula

• Formula: length(m)×across width(mm)×across width(mm)×0.0065

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 20

Copper Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00698

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 21

Brass Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00668

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 22

Aluminum Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.0022

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 23

Square Copper Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0089

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 24

Square Brass Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0085

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 25

Square Aluminum Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0028

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 26

Hexagonal Copper Rod weight calculation formula

• Formula: across width(mm)×across width(mm)×length(m)×0.0077

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 27

Hexagonal Brass Rod weight calculation formula

• Formula: width(mm)×across width(mm)×length(m)×0.00736

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 28

Hexagonal Aluminum Rod weight calculation formula

• Formula: across width(mm)×across width(mm)×length(m)×0.00242

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 29

Aluminum Plate weight calculation formula

• Formula: thickness(mm)×width(mm)×length(m)×0.00171

Theoretical Steel Weight Calculation Formula (30 Types of Metals) 30

Aluminum Pipe weight calculation formula

• Formula: thickness(mm)×(O.D(mm)-thickness(mm))×length(m)×0.00879

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