Formula variables
- Flange and core diameters define the annular cable space.
- Reel width is the winding width in millimetres.
- Cable outside diameter is the entered cable OD.
- Packing factor reduces ideal length for real winding gaps.
Assumptions
- The calculator treats the wound cable space as an annulus around the reel core.
- Packing factor is entered by the user to account for imperfect winding.
- Cable outside diameter is entered from measured or manufacturer data.
- This calculator does not replace reel tags, measured length, manufacturer data, or project material reconciliation.
Examples
Part reel estimate. A 900 mm flange, 300 mm core, 500 mm width, 25 mm cable OD, and 0.75 packing factor estimate about 432 m.
Material workflow. Use reel tag data or measured payout where exact remaining length matters.