Crochet maths, done for you.
How much yarn to buy, how many squares to make, when to stop increasing and what to charge. Pick a skein and get your answer in seconds.
Every blanket, hat and amigurumi starts with a number. We work it out, so your hook keeps moving.
Yarn, squares and corner to corner graphs for blankets of any size.
Yarn calculator
How many yards and skeins for a blanket, scarf, hat or any size.
Open tool →Granny square calculator
How many squares for any blanket, with border and yarn.
Open tool →C2C blanket calculator
Tiles across and down, and when to stop increasing.
Open tool →C2C pattern generator
Turn any picture into a corner to corner graph with written rows.
Open tool →
Turn any picture into a C2C graph
Upload a photo or drawing, choose the size and colours, and get a graph, a colour key with yarn amounts and written instructions for every diagonal row.
Make a graphShaping in the round: crowns, balls and even increases.
Price your work so it pays for your time.
Gauge, yarn weights, hooks and pattern terms.
Why crocheters use HookMath
Answers first
Every page opens with the calculator. Charts and explanations come after, when you want them.
Uses your own gauge
Enter your swatch and the numbers fit your hook and tension, not someone else's.
Your data stays with you
Everything runs in your browser. Pictures you turn into graphs never leave your device.