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Stock weight calculator

Weight is density times volume — the work is in the volume. A 500 mm length of Ø50 6061 bar is 2.65 kg; the same bar in 316 stainless is 7.85 kg. Pick the shape (round, hex, tube, plate, ring), enter dimensions, choose a material, and the calculator returns the weight in kg and lb — for quoting, freight, and sanity-checking a cert against the delivered bar.

Dimensions

Volume per piece
49.087cm³
Mass per piece (kg)
0.385kg
Mass per piece (lb)
0.850lb

Volume comes from the selected solid-geometry shape; mass = volume in cm³ × density in g/cm³ ÷ 1000, with lb converted from kg.

Material context: materials and hardness conversion.

Secondary verifiedCoverage: common

Standard engineering handbook values (MatWeb material property data; manufacturer datasheets)

Limitation: Densities are nominal handbook values; alloy, temper, and form variation is typically ±1–2%.

Limitation: Not a substitute for the material specification on the drawing.

Values follow the governing standard, which is authoritative for production and inspection decisions. Verify against it before you rely on a number.

Standard names are trademarks of their respective owners; ASdrawn is not affiliated with or endorsed by any standards body.

Why calculate stock weight before you cut?

Weight drives cost. Quoting material, booking freight, and checking a delivered bar against its mill cert all need the weight of a shape that is not on a scale yet. Weight is density times volume — the part that is easy to get wrong is the volume of a tube, hex, or ring, which this calculator handles for each stock form.

Pick the shape, enter the dimensions, choose a material for its handbook density, and read the weight in kg and lb. Handbook densities carry a small alloy-and-temper spread, so treat the result as a close estimate for quoting and sanity checks, not a certified mass.