Crochet Calculators

These free crochet calculators do the yarn and size math for you. Pick the one you need, type in a few numbers from your pattern, your yarn label or a small swatch, and get your answer right away. They work on your phone too, so you can use them at the yarn store.

Every calculator has its own page, with step by step help and a worked example, so you can check your numbers before you start.

Stitch multiples calculatorTurn “a multiple of 4 + 2” into the right starting chain for your width.Open → Scarf calculatorHow much yarn your scarf needs, from a small swatch.Open → Yarn substitution calculatorUse a different yarn: how many skeins of your yarn you need.Open → Yarn stash calculatorHow much yarn is left in your leftover balls, by weight.Open → Project yardage calculatorHow much yarn a finished project used, so you can make it again.Open → C2C blanket size calculatorFinished size of a corner to corner blanket, or the blocks you need.Open → Blanket sizing calculatorStarting chains, stitches, rows and yarn for any blanket size, from your swatch.Open → Crochet time calculatorHow long a project will take, from your skeins and your own pace.Open → Stitch Studio project keeperKeep each project’s hook, yarn and row count together on your phone.Open →

Which calculator do I need?

Before you start a project

Use the stitch multiples calculator to find your starting chain, the blanket sizing calculator for a blanket of any size, the scarf calculator for a scarf, and the C2C blanket size calculator for a corner to corner graph.

When you are buying yarn

Use the yarn substitution calculator if you want a different yarn from the one in the pattern. It tells you how many skeins of your yarn to buy.

When you use up your stash

Use the yarn stash calculator to see how much is left in your leftover balls, and the project yardage calculator to see how much yarn a finished project used.

To plan your time

Use the crochet time calculator to see how long a project will take, and Stitch Studio to keep your hook, yarn and row count together on your phone.

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