Calculator
Yarn Substitution Calculator
Working out how many balls of a substitute yarn you need? Enter what your pattern recommends and up to three yarns you're considering as a substitute — we'll do the maths so you can compare them side by side.
1. Your pattern's recommended yarn
Total weight given in the pattern for the size you're making, e.g. "approx 300 g".
Check the yarn's ball band label.
Check the yarn's ball band label.
Substitute 1
Check the yarn's ball band label.
Enter this to check how the substitute's density compares to the recommended yarn.
Compare up to 3 candidate yarns side by side.