Yarn yardage calculator
Estimate yarn from a swatch and project size
For knitting, crochet, and simple rectangular projects, swatch-based estimates can answer the basic buying question: how much yarn do I need?
Swatch yardage calculator
When to use this tool
Use this for general yarn planning when you have a representative swatch. For handweaving, the dedicated weaving calculator is better because it separates warp, weft, loom waste, sett, and PPI.