⚖️ Metal Weight Calculator
Choose a shape and material, enter the dimensions, and get the weight of your stock in pounds and kilograms — for quoting, ordering, and working out what your crane or your back can lift.
Informational estimates only — verify against manufacturer specs; not professional engineering advice.
🧮 Weigh Your Stock
⚖️ Estimated weight
What is a Metal Weight Calculator?
Every steel supplier prices and ships by weight, and every fabricator needs that number before the first cut — to quote a job, size the freight, and know whether a plate is a two-person lift or a forklift job. This calculator turns a shape, a set of dimensions, and a material into a weight without you hunting through a mill catalogue.
It computes volume from the geometry of the section — solid for bar, hollow for pipe — and multiplies by the documented density of the alloy you pick. The answer comes back in both pounds and kilograms so it drops straight into a quote or a shipping form. It is a working estimate: mill tolerances and alloy grade shift the real mass, so confirm anything critical against the manufacturer's spec.
❓ Frequently Asked Questions
How is metal weight calculated?
Weight = volume × density. The calculator works out the volume from the shape and your dimensions — length × width × thickness for plate, π·r²·length for round bar, side²·length for square bar, and the annular ring for pipe — then multiplies by the material's density. Mild steel is about 7.85 g/cm³, stainless 8.0, aluminium 2.70, copper 8.96.
Why is my piece slightly heavier or lighter than the estimate?
Nominal densities assume a clean, room-temperature alloy at its exact nominal dimensions. Mill tolerances on thickness and diameter, alloy grade, and surface scale all move the real figure a little. Treat the result as a close working estimate, not a certified mass — weigh critical pieces on a scale.
Can I mix metric and imperial?
Pick one system per calculation. Enter every dimension in millimetres, or every dimension in inches; the output is always given in both pounds and kilograms so you can quote either way. For a plate listed as 8 ft × 4 ft × 10 mm, convert the feet to a single unit first.
Is this an exact figure for structural work?
No — it is an informational estimate for material takeoffs, shipping, and shop planning. Verify against manufacturer specs and the actual mill certificate for anything load-bearing. Not professional engineering advice.