Free knitting & crochet math
Stuck on "increase evenly"? We do the math. You keep knitting.
Your pattern said "increase 6 sts evenly" and just… left. Pop in your numbers and get a row you can knit right now. Blanket chains and yarn swaps too. No sign-up, and it works on your phone mid-row.
Your pattern: "Increase 6 sts evenly across 48 sts"
Increase & decrease evenly
Turn "increase 6 sts evenly across" into a row you can actually knit, plus a checklist so you never lose your place. Flat or in the round.
Let's go →Blanket size & starting chain
Swatch in, starting chain out. Plus your row count and how much yarn to grab, for every size from lovey to king.
Let's go →Yarn substitution
Fell for a different yarn? Find out how many skeins to buy, even if it's thicker, thinner or held double. No more yarn chicken.
Let's go →Built for the middle of a project
- A row you can actually follow. Written like your pattern, with a checklist so you don’t lose count halfway across.
- Math you can trust. Every answer gets recounted before you see it. No frogging a whole row because of bad math.
- US or UK terms. Flip crochet results between US sc/dc and UK dc/tr in one tap.
- Inches or cm, yards or meters. Whatever your tape measure and yarn label say.
- Nothing to download. Works on your phone right next to your WIP. No account, no email.
- Swap any yarn weight. Thicker, thinner or held double. Finally a use for that stash.
Free calculators for the math in your patterns
Patterns are great at telling you what to make and not so great at the math in between. “Increase 8 sts evenly.” “Use any worsted yarn.” “Make it any size you like.” Each calculator here takes one of those lines and turns it into something you can knit or crochet right away.
Everything runs in your browser and works the same on a phone, tablet or computer. Your numbers stay on your device.