Yarn Calculator & Substitution Matcher
Know how much yarn you need, find swaps, and pair your colors — no subscription required.
Skein Calculator
Pick your weight, project and fiber — get total yardage and a skein count, with a safety heads-up.
Substitution Matcher
See same-weight and close-weight swaps with fiber-behavior notes so you can confidently substitute.
Color Pairing
Tap the colors you have and find which curated palette they fit, with placement suggestions.
You don't need to guess at the yarn store anymore. Pick your weight, project and fiber to get a skein count and yardage, see confident substitutions, and match the colors you already own to curated palettes. Buy once, use forever.
Included with your purchase
The Stash Audit
I knew I had yarn. I knew I had yarn. But what I didn't know was that I had seven skeins of the exact same mustard yellow — bought in three different years, for three different projects, none of which I actually started. There were half-finished dishcloths tangled with a scarf I abandoned in 2023. And buried in the very back, a single cake of the most beautiful tie-dyed cotton that I'd completely forgotten I owned. A stash audit isn't about organizing — it's about discovering. It takes thirty minutes, it changes how you create, and it might just save you from buying that fourth skein of mustard yellow. Download to read more...
Calculate yarn yardage, find substitutions, and pair your colors — one time purchase.
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This is a standalone tool — it doesn't require or include a CraftOS subscription.