Free tool · Calculator
Steel plate weight calculator
Length × width × thickness × density — nothing more. Type your plate dimensions and quantity and the weight updates as you type, in pounds and kilograms. Imperial mode takes fractions the way the shop writes them: 3/16, 1 1/4.
Converting shop fractions? The mm ↔ inch converter → · More free in-browser tools: the DXF viewer →
Runs entirely in your browser. Nothing you type is sent anywhere — there is no server to send it to.
The math is length × width × thickness × density, computed right here on this page. No accounts, no analytics, no uploads.
Plate
DECIMALS OR FRACTIONS — 3/16, 1 1/4, 1-1/4 ALL WORK · FLAT RECTANGULAR PLATE ONLY
Quick reference · carbon steel
Common plate weights per square foot
The numbers below are computed from the carbon-steel density above (0.2836 lb/in³ = 7,850 kg/m³) — the same math as the calculator, not a catalog lookup.
| Thickness | in | mm | lb/ft² | kg/m² |
|---|
A 4×8 ft sheet is 32 ft² — multiply the lb/ft² figure by 32 for a full-sheet weight.
Limits · stated plainly
What this calculates: flat rectangular plate only — length × width × thickness × density, times quantity. No shapes, no cutouts, no holes deducted, no camber. What the numbers are: nominal weights from the densities shown above; actual plate varies with rolling tolerance and chemistry, and the mill cert governs. Weights are computed from the kg/m³ figure; pounds are derived at 2.204623 lb/kg, and both round to one decimal. Where the math runs: in this page, in your browser. Nothing you type is stored or sent anywhere.