FREE CROCHET TOOLS
Crochet course math checker
Review consumed stitches and produced stitches in a supported written round sequence.
Completely free. Noncommercial. No account, ads or uploads.
Enter your measurements and calculate to see the result.
How the calculation works
Each supported instruction has a consumed count and a created count. The checker compares consumption with the previous computed round, and production with the written total. It does not alter your text or guess unknown instructions.
Worked example
(4 sc, inc) x 6 consumes 30 stitches and creates 36. If the written total is [35], that line needs review. An unknown instruction leaves its count unresolved; dependent instructions remain marked for review.
What this tool covers
Choose US or UK source terms. Supports basic and taller stitches through US double treble, nested repeats, chain and slip stitches, joins, colors, FLO/BLO, post targets, magic rings, and written totals. Bobble/bo uses one input and one output for arithmetic; check the actual stitch definition separately. Counting chains and joins follows the instructions; a turning chain can be marked (does not count) or (counts as 1). Unknown stitches remain unverified. The current studio uses its own construction controls; this checker is a separate reading aid. At most 200 courses, 50,000 characters and 5,000 expanded steps. Count agreement does not establish physical shape or seam fit.
Inputs stay in this tab. Copy the result for your own review; these calculators do not apply old-format data to the current studio.