Metal Weight Calculator
Work out the weight of steel and other metals in kilograms. Choose the shape, enter the sizes in millimetres and the length in metres, and the weight updates as you type.
Select shape
Theoretical weight from nominal sizes. Actual weight varies with rolling tolerance and, for H and I beams, the root radius.
How the weight is calculated
Weight (kg) = cross-section area (mm²) × length (m) × density (g/cm³) ÷ 1000. For mild steel the density is 7.85 g/cm³.
| Shape | Cross-section area (mm²) | Example (mild steel, 1 m) |
|---|---|---|
| Plate / sheet | thickness × width | 10 × 1000 mm = 78.50 kg |
| Round bar | π × D² ÷ 4 | 50 mm dia = 15.41 kg |
| Round pipe | π × (OD − t) × t | 60 mm OD × 4 mm = 5.52 kg |
| Square / rectangular tube | 2 × t × (W + H − 2t) | 50 × 50 × 3 mm = 4.43 kg |
| Equal angle | t × (2A − t) | 50 × 50 × 5 mm = 3.73 kg |
| H beam / I beam | 2 × B × tf + (H − 2tf) × tw | 100 × 100 × 6 mm = 13.56 kg |
D = diameter, OD = outside diameter, t = wall or leg thickness, W = width, H = height, A = leg length, B = flange width, tf = flange thickness, tw = web thickness.
Frequently asked questions
What is the density of mild steel?
7.85 g/cm³, which is 7850 kg/m³. Stainless steel is about 8.00 g/cm³ and aluminium about 2.70 g/cm³.
How do I calculate the weight of a steel plate?
Weight (kg) = length (m) × width (m) × thickness (mm) × 7.85. For example, a 2000 × 6000 × 10 mm plate weighs 2 × 6 × 10 × 7.85 = 942 kg.
How do I calculate MS pipe weight per metre?
Weight (kg/m) = (OD − t) × t × 0.02466, with OD and t in mm. For example, 60 mm OD × 4 mm wall = 56 × 4 × 0.02466 = 5.52 kg/m.
Why is the real weight different from the calculator?
Mills roll steel within a thickness tolerance, and hot-rolled beams and angles have rounded corners, so the actual weight can be slightly more or less than the theoretical figure.
Need these materials in Dubai?
Ibnee Younus Building & Construction Materials Trading Co. LLC supplies MS plate, pipes, tubes, beams, angles, channels, GI sheet and mesh from Dubai Industrial City. Send your sizes and quantities for a quotation.