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Steel Weight & Cost Calculator

Weight of any cut length from your own dimensions — not a standard-section lookup.

Metric · IS practiceFormula shown with your numbersNothing stored

How this calculator works

Weight comes from volume and density, nothing else. The calculator works out the cross-sectional volume for the shape you pick, multiplies by length to get mm³, converts to cubic metres and multiplies by the density of the material. Enter a rate per kilogram and it also returns the material cost for the lot, with and without 18% GST.

Formulas used

Plate or flatV = L × W × T
Round barV = (π/4) × D² × L
Pipe or tubeV = (π/4) × (OD² − ID²) × L, ID = OD − 2t
Square barV = a² × L
Hex barV = 0.866 × AF² × L
AngleV = (a + b − t) × t × L
Mass from volumem = V ÷ 10⁹ × ρ

Densities used

Mild steel (IS 2062)7850 kg/m³
SS 3047930 kg/m³
SS 3167980 kg/m³
Cast iron7200 kg/m³
Aluminium2700 kg/m³
Brass8500 kg/m³
Copper8960 kg/m³

Checked against

ISA 75×75×8 equal angle works out at 8.92 kg/m against the 8.9 kg/m printed in the IS section tables — the small difference is the root radius, which the formula ignores.

Worth knowing

This is theoretical weight. Rolling tolerance on plate and pipe normally puts the actual weight within ±2–5%, and cutting kerf and offcut scrap are not included.

Steel Weight & Cost Calculator — common questions

How do I calculate the weight of a steel plate?
Multiply length × width × thickness in millimetres to get the volume in mm³, divide by 1,000,000,000 and multiply by 7850 for mild steel. A 1000 × 500 × 6 mm plate is 3,000,000 mm³, which is 23.55 kg.
What density should I use for stainless steel?
7930 kg/m³ for SS 304 and 7980 kg/m³ for SS 316. Both are heavier than mild steel at 7850, so a stainless part is roughly 1–2% heavier than the same part in MS.

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Got a number you don’t like?

If the sizing is telling you something awkward, send it over. We build these machines — we can tell you whether the number is wrong or the layout is.

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Contact

Chennai, Tamil Nadu

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+91 91763 23669

spdynamics25@gmail.com

Eshwar C S

Works & office

T-231 A, Sidco Women's Industrial Park
Kattur, Avadi, Chennai – 600 062
Tamil Nadu, India

GSTIN

33DENPP4793D1Z5

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