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Cable Drum Capacity Calculator — Reel Length & Fill

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Dimension unit Flange diameter Barrel / core diameter Winding width between flanges Finished cable OD Use finished outside diameter including sheath/jacket.Radial edge clearance / freeboard Reserved from cable build to flange edge.Packing factor (%) Explicit winding-volume utilization assumption.Working fill (%) Additional operational reserve after packing.Length output Target cable length (optional) Reverse-solves theoretical minimum flange diameter in the selected output length unit.Supplier capacity (optional) Compare supplier capacity in the selected output length unit.

Calculated result

382.73 m working capacity

Usable winding diameter: 750 mm

Ideal volume-equivalent capacity: 531.56 m

After 90% packing: 478.41 m

Working capacity at 80% fill: 382.73 m

Discrete geometry diagnostic: about 11 full radial layers × 22 whole cable diameters across the winding width

Show the working

1. Usable diameter = 800 − 2 × 25 = 750 mm.
2. Ideal length = 450 × (750² − 300²) ÷ 20² = 531.56 m.
3. Packed capacity = 531.56 × 0.9 = 478.41 m.
4. Working capacity = 478.41 × 0.8 = 382.73 m.

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