Free crochet calculators & converters

The maths behind every project, done for you. No sign-up, works on your phone, in cm or inches. Tools that name stitches work in US and UK terms.

Understand a pattern

Stuck on a line or a stitch? The decoder explains any row you paste in, the identifier names a stitch from a photo, and the converter switches a whole pattern between US and UK terms.

🔎 Pattern decoder · newPaste a confusing line. Get it in plain words, drawn out, with the count checked.📷 Stitch identifier · newWhat stitch is this? Photo in, stitch name out. With the lesson.🇺🇸🇬🇧 US ↔ UK terms converterPaste a pattern, convert it. Plus the full conversion chart.

Plan a project

Before you start: how many chains to make for the width you want, how much yarn to buy, and which hook goes with your yarn.

⛓️ Foundation chain calculatorHow many chains to start, for any width, gauge and stitch.🧶 Yarn calculatorHow much yarn do I need? Yards, metres and skeins for any project.🪝 Hook size chartmm ↔ US ↔ UK conversion with yarn weights.

While you crochet

Keep count without losing your place: tap once per row, track a repeat inside a pattern, and set the row you are aiming for.

🔢 Row counter · newOne big tap button on your phone. Repeats, a target row, and it remembers your count.

Sell what you make

Work out a fair price that pays for your materials and your time.

💷 Pricing calculatorPrice your makes fairly. Time, materials, fees, profit.

Want it all in one place?

These tools are the free, standalone versions of what the Crochets app does automatically: design a piece on a grid and it writes the pattern, counts every stitch and row, calculates the yarn, and shows a preview picture of the finished piece before you buy a single skein. In your terms, in the hand you crochet with.

Do the math in the app: free

Pattern designer, yarn amounts, row counters and every stitch in the hand you crochet with. No card needed.

Start free →