Metal Weight
Weight of plate, sheet, bar, tube, and angle from dimensions and material density.
Ideal geometry,
one density.
Every number here can be checked by hand.
How weight is calculated
Mass (kg) = section area (mm²) × length (mm) × density (kg/m³) ÷ 10⁹. Areas use the ideal section: plate and flat bar = width × thickness; round bar = π × d² ÷ 4; square = side²; hex bar = (√3 ÷ 2) × (across-flats)²; round tube = π × wall × (OD − wall); rectangular tube = 2 × wall × (width + height − 2 × wall); angle = thickness × (leg A + leg B − thickness). Inch dimensions are converted at exactly 25.4 mm; lb/ft uses 1 kg = 2.20462 lb and 1 m = 3.28084 ft. Worked example: a 1,000 × 1,000 × 10 mm mild-steel plate weighs 78.5 kg; a 1 in round bar is 2.67 lb/ft.
Why supplier weights differ
Catalogues include corner and root radii, rolling tolerances, and the exact alloy density; this page assumes sharp corners and a typical density per material (editable). An equal angle 50 × 50 × 5 mm computes to 3.73 kg/m here and is listed around 3.77 kg/m by mills — about 1 %. Use supplier data for purchasing and structural work.
What this utility does not do
No beams, channels, or coils yet; no pricing; no cutting plan (for that, hand the profile to Material Planner). Inputs stay in your browser; the same four anonymous usage counts as the rest of the site apply.