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How to calculate sheet steel weight
The theoretical mass of a flat sheet can be estimated by multiplying its volume by material density. A value of 7,850 kg/m³ is commonly used as an approximation for carbon steel; it should not be treated as a confirmed delivery weight.
Formula
With dimensions in millimetres and density in kg/m³: weight (kg) = length × width × thickness × density ÷ 1,000,000,000.
For example, a flat carbon-steel sheet measuring 2,000 × 1,000 × 10 mm has a theoretical result of about 157 kg. This illustrates the formula; it is not a declared weight for a particular supplied product.
Why can the result differ?
Actual mass can vary with material composition, tolerances, coating and measurement method. Coils, sections and tubes require their cross-sectional geometry to be included; the flat-sheet formula cannot be applied directly to them.
For shipping, invoicing or engineering, use the producer documentation and measured dimensions. This calculator is for an approximate estimate only.
Approximate sheet weight calculator
Theoretical weight: —
This is an estimate and must not be treated as the actual product weight.
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The formula and density assumption are for approximate calculation. Use the supplier certificate, product standard and actual dimensions for confirmed values.