Estimate how many yards, meters and skeins of yarn a knitting or crochet project needs by type, size, weight and craft.
Estimates assume average tension and plain stockinette or single crochet. Buy a spare skein from the same dye lot to be safe.
About this tool
Yarn Quantity Estimator is a free, in-browser tool that predicts how much yarn a knitting or crochet project needs before you buy. Choose a project type, a size, your yarn weight and craft, enter the yards printed on the ball band, and it returns total yards, meters and the number of skeins to purchase. Nothing is uploaded — every figure is worked out on your device as you change the inputs.
Each project type carries a baseline yardage for a medium item in worsted-weight yarn. That baseline is scaled by a size factor (XS 0.8 up to 2XL 1.5), a yarn-weight factor where finer yarn needs more length to cover the same area (lace 2.6, fingering 2.0, DK 1.2, worsted 1.0, bulky 0.7, super-bulky 0.5), and a craft factor (crochet uses about 1.3× the yarn of knitting for the same piece). A 15% buffer is added, then skeins = ceil(total yards ÷ yards per skein).
Treat the result as a shopping guide, not a stitch-exact count — real usage depends on your tension, stitch pattern and how you finish edges. Buying one extra skein from the same dye lot is cheap insurance against running short, since later balls rarely match shade exactly.
Frequently asked questions
Why does finer yarn need more yardage?
A thinner strand covers less area per yard, so a lace or fingering sweater takes far more length than the same sweater in bulky yarn. The weight factor reflects this: lace is 2.6× the worsted baseline while super-bulky is about 0.5×.
How many skeins should I buy?
The tool divides total yards by the yards-per-skein you enter from the ball band and rounds up, because you buy whole balls. Adding one spare skein from the same dye lot protects against shade differences in a later purchase.
Does crochet really use more yarn than knitting?
Yes. For the same finished area crochet typically consumes about 30% more yarn than knitting because its stitches are taller and denser, so the tool multiplies by 1.3 when you select crochet.
Are these figures exact?
No — they are planning estimates. Actual usage varies with your gauge, stitch pattern, ribbing and edging. Always work a gauge swatch and compare against the pattern's stated yardage when one is available.