Long tail cast on calculator

Scale the yarn used by a small cast-on sample and add a working tail.

Your calculation

Allow 4.22 metres for the long tail.

Tail
422.5 cm
Tail
166.34 in

Use your measurements

Measure both strands consumed by the long-tail cast on before unravelling the sample. The long tail must cover the thumb-side share; using the total sample consumption gives a generous allowance.