How to calculate it
Multiply the sample's yarn use by project area ÷ sample area, then add the reserve percentage. Divide by the yards in one skein and round up to whole skeins.
Worked example
A 10 × 10 in sample using 50 yd scales to 1,000 yd for a 40 × 50 in project. With 10% reserve and 220 yd skeins, buy 5 skeins.
Before you cut or buy
- Area scaling assumes the same yarn, hook, stitch pattern and gauge throughout.
- Shaping, borders, textures and color changes can make real use differ; weigh a representative swatch when possible.
Common questions
Can I estimate a blanket from a small crochet swatch?
Yes, when the swatch uses the same yarn, hook, pattern and tension. Weighing a larger representative swatch often improves the estimate, especially for textured stitches.
Why round skeins up?
You cannot normally buy part of a skein. The calculator adds your reserve, divides by the label's yards per skein and rounds up to a whole number.
Use your own measured materials and pattern instructions. Estimates cannot account for every variation in technique, shrinkage or layout.