Yarn Calc
How much yarn does your project need — and what can you substitute when the pattern's yarn is unavailable, discontinued, or out of budget? Answered with the math shown, from manufacturer ball-band specs, never a bare number.
How much yarn do I need?
Project
Yarn weight
Your swatch gauge, if you have one (stitches per 4 in — optional)
Buying a specific yarn? (optional — converts the estimate to skeins)
Substitute this yarn
The yarn you need a substitute for
Discontinued yarns — best substitutes
These yarns are marked discontinued on their maker's own page (or their line was retired from the maker's catalog). Each page ranks in-production substitutes with the reasoning shown.