Stainless Steel Coil Calculator | Weight, Length & OD

Product & material

Grade / density basis

Preset density: 7,800 kg/m³ at room temperature for 310S/1.4845. Use a documented density for other grades.

Unit system Metric Imperial

Dimensions

Thickness

Width

Coil length

Order / calculation mode

Calculation

Theoretical coil result

Enter values and calculate.

Substituted formula: Calculate to show the formula and substituted values.
Density basis used: Calculate to show the density used for this result.
Calculation notes: Calculate to show the notes that apply to this result.

Use the calculated coil value for sizing and logistics. Actual outside diameter or weight can vary with gaps, crown, telescoping, packing and actual density.

How the result is calculated

Nominal dimensions are normalized before calculation; metric and imperial displays represent the same stored values.
310S uses the reviewed room-temperature producer density shown below; other listed grades require an explicit custom density.
Weight and length modes treat the coil as flat strip with uniform thickness and width.
Outer diameter is an annulus-volume estimate, not a winding specification. Gaps, crown, telescoping, packing and actual density can change the delivered OD.
Results are theoretical purchasing estimates, not certified, scale, invoicing or settlement values.

Worked examples

310S coil weight ↔ length

At 1.5 mm thick, 1,000 mm wide and 7,800 kg/m³, 500 m of nominal flat strip weighs 5,850 kg. Entering the same 5,850 kg returns 500 m before display rounding.

Compare available stainless coil and stainless strip supply forms.

310S annulus OD estimate

A 1,000 kg coil, 1,000 mm wide, with 508 mm ID and 7,800 kg/m³ density gives a theoretical 649.076 mm OD from annular volume.

Review the 310S grade basis, then confirm winding tolerances and packing with the supplier.

Next purchasing steps

Use this coil estimate in an RFQ Review coil supply Review strip supply Review Technical Center guidance

Frequently asked questions

Is the calculated coil outer diameter exact?

No. It is an annulus-volume estimate. Gaps between wraps, crown, telescoping and actual density can change the delivered outside diameter.

Which density should I use?

Use the reviewed grade-specific value when available. Otherwise enter the density from the applicable material documentation and confirm the commercial order-weight basis with the supplier.

Can I convert both coil length and weight?

Yes. Weight-from-length and length-from-weight use the same nominal thickness, width and density. With the same inputs, the results are inverse apart from display rounding.

Does the coil calculation include processing loss?

No. Add head and tail cuts, edge trim, samples and setup loss separately from the agreed processing plan. Calculated metal length is not a guarantee of usable finished length.