Weight

Flat, Plate & Square Bar Weight Calculator

Calculate the weight of flat bar, sheet, plate or square bar from thickness, width, length and grade — square bar is simply width = thickness. A real GET form: computes correctly with JavaScript off.

Cross-section

Quantity

Thickness

Width

Square bar: set width = thickness.

Length

1 000 mm = 1 m

Material

Steel grade (optional — search by number or designation) Leave blank to use a generic class estimate instead.

Sourced7.85 g/cm³

1.0038 — Werkstoffnummer catalogue

Material class (fallback — used only when no grade above is chosen) Generic values are class averages, never a substitute for a grade's own measured density.

Reset Recalculates on submit — the same value renders with JavaScript off.

Download as PDFResult sheet · A4Run a calculation first — then the sheet is ready to download.

Flat & square bar weight — frequently asked

How do I calculate a square bar with this form?

Enter the same value for width and thickness — a square bar is the width = thickness special case of the rectangular cross-section.

What is the Factor-8 rule shown under the result?

A trade shortcut: 8.0 kg per m² per mm of thickness, which silently assumes a density of 8.00 g/cm³. We show it with its delta from the exact result — we never use it as the answer.

Does the result change when I pick a grade instead of a material class?

Yes — density varies by grade. The material class value is a generic average, only used as a fallback when no specific grade is chosen.