Short answer: Steel weight is simply volume times density. With a density of about 7.85 g/cm3 for carbon steel, you can estimate the weight of bar, pipe, sheet, and plate from their dimensions. This quick reference gives the formulas and a density table so you can price and plan shipments accurately.
At a Glance
The Core Formula
Weight = Volume x Density. For steel, density is about 7.85 g/cm3 (7850 kg/m3). Convert all dimensions to the same unit, compute the cross-sectional area or volume, multiply by 7.85, and you have the mass. This works for any form once you know the geometry.
Per-Meter and Per-Sheet Quick Formulas
Round bar (kg/m): 0.006165 x diameter(mm)2. Square bar (kg/m): 0.00785 x side(mm)2. Sheet/plate (kg/m2): thickness(mm) x 7.85. Pipe (kg/m): 0.02466 x wall(mm) x (OD – wall)(mm). Keep units in mm and the constants do the rest.
Density by Material
The chart shows why density matters when comparing metals. Carbon and alloy steels sit near 7.85; stainless is a little lower (~7.9); aluminum is ~2.7 and copper ~8.96, so the same volume weighs very differently. Aluminium en stainless pages give their own figures.
Why Weight Estimates Matter
Accurate weight drives shipping cost, crane and support sizing, and quotation. Send HXSCO your dimensions and quantity and we will confirm weights with mill certificates so your plan and budget stay accurate.
Veelgestelde vragen
About 7.85 g/cm3 (7850 kg/m3) for carbon and most alloy steels; stainless is slightly higher at ~7.9.
For round bar: 0.006165 x d(mm)2 kg/m; square bar: 0.00785 x side(mm)2 kg/m; pipe: 0.02466 x wall x (OD – wall) kg/m.
Weight per m2 = thickness(mm) x 7.85; multiply by area for total mass.
Slightly – about 7.9 vs 7.85 g/cm3, a negligible difference for most estimates.
Yes – send dimensions and quantity; we confirm with mill-test certificates for accurate quoting and shipping.
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