Steel Weight Per Foot Calculator

Steel weight calculation follows the standard formula: Weight = Volume × Density. Steel has a consistent density of approximately 490 pounds per cubic foot (7,850 kg/m³), making it one of the densest common construction materials — roughly three times heavier than concrete and nearly three times heavier than granite.

For flat steel plates and sheets, calculate the volume by multiplying length × width × thickness (all in the same units), then multiply by the density. For structural shapes like I-beams, channels, and angles, it is more practical to use the published weight-per-linear-foot values found in steel reference tables, since these shapes have complex cross-sections that make volume calculation tedious.

When working in inches, a useful shortcut for mild steel plate is to multiply length (in) × width (in) × thickness (in) × 0.2833 to get the weight in pounds. This constant (0.2833 lb/in³) is the density of carbon steel expressed in pounds per cubic inch.