Makers & production
How much material is left on this roll?
Divide radial build by material thickness for equivalent turns. Multiply by the average circumference, using the core diameter plus one radial build, and convert millimetres to metres. Assume tight, evenly wound material of uniform thickness.
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Worked example
With the example inputs below, the calculator returns these results.
Estimated material length (m) 14.14
- Bare core outside diameter
- 80 mm
- Wound depth on one side of core
- 10 mm
- Thickness of one layer
- 0.2 mm
Other results
- Equivalent turns
- 50
- Outer roll diameter (mm)
- 100
Use your own figures
Check stock on a part-used core without unwinding it. Open the worksheet, replace the example values, then copy or print the result.
Wound material length →