Stainless Steel Coil Weight Calculator
Stainless steel coil weight depends on the grade: austenitic grades like SS 304 and 316 are denser (7.93 g/cm³) than ferritic SS 430 (about 7.70 g/cm³) - roughly a 3% difference that matters when you're pricing by weight.
This is an interactive calculator; enable JavaScript to use it. Enter coil OD, ID and width to get weight in kg/tonnes, plus strip length if thickness is given.
Typical Stainless Steel Coil Specifications
| Density | SS 304/316: 7.93 · SS 430: 7.70 g/cm³ |
| Common thickness | 0.3–6mm |
| Common coil ID | 508mm or 610mm |
| Typical coil weight | 3–20 tonnes |
Example: an SS 304 coil with 1400mm OD, 508mm ID and 1250mm width weighs about π/4 × (1400² − 508²) × 1250 × 7.93 × 10⁻⁶ ≈ 13.2 tonnes.
Coil Weight Formula
Weight (kg) = π/4 × (OD² − ID²) × Width × Density × 10⁻⁶ - with OD, ID and Width in millimetres and density in g/cm³.
Frequently Asked Questions
Do SS 304 and SS 430 coils of the same size weigh the same?
No. SS 304 (7.93 g/cm³) is about 3% heavier than SS 430 (7.70 g/cm³) for identical dimensions. Select the correct grade in the calculator to avoid pricing and logistics errors.
Why does SS coil weight matter more than for mild steel?
Stainless is several times the price of mild steel per kg, so a 3% weight error is a much larger commercial error. Accurate weights also matter for surface-critical handling equipment ratings.