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Free Crochet Calculators

The three questions every project starts with — how many squares, how much yarn, which colors — answered with math instead of guesswork. Free, no signup, phone-friendly.

Measure One Square, Plan the Whole Blanket

Every calculator here starts from something you measure, not an assumed gauge. Crochet a single square, block it, measure it, and the blanket calculator turns that number into the full plan: how many squares for a baby blanket, a throw, or a king-size spread, laid out in an across-by-down grid with the true finished dimensions. The yarn calculator works the same way for yardage — project size, stitch, and yarn weight in; yards, meters, and whole skeins out, with a safety margin so you never run out one row from the border.

Colors Are a Math Problem Too

The pattern generator shuffles round-by-round color combinations from curated yarn palettes and previews a whole blanket of them — because a square that looks good alone can turn muddy in a 10×12 grid. When a combination clicks, download the chart and take it to your project bag. All three tools share the same idea: do the arithmetic once, properly, and spend the hours on the hooking, not the second-guessing.

Frequently Asked Questions

How do I work out how many granny squares I need?

Divide the target blanket width and length by the finished size of one blocked square, rounding to whole squares. The blanket calculator does this for every standard size from lovey to king — and shows the across × down grid, the true finished dimensions, and a yarn estimate.

How much yarn do I need for a crochet blanket?

It depends on three things: the blanket area, the stitch (granny stitch uses noticeably less than single crochet), and the yarn weight. The yarn calculator combines all three and returns total yards, meters, and whole skeins with a 10% safety margin.

Are the calculators free? Do I need an account?

Completely free, no account, and they work on your phone at the yarn store. The pages carry ads (that is what keeps them free), but nothing interrupts the calculators themselves.

My gauge is different — can I still use them?

Yes: both calculators take YOUR measured square size or project dimensions as input rather than assuming a gauge. Measure one finished, blocked square and enter that — the math follows your tension, not an average.