Calculator
Cast-On Calculator
Tell us your gauge and how wide you want your finished piece — we'll do the math.
Calculator
How this works
Cast-on math is simple but easy to get wrong by hand. Multiply your desired finished width by your gauge (stitches per inch) and round to a whole number. We do that for you — and we round to your stitch repeat if you have one.
What's a stitch multiple?
Many stitch patterns repeat every N stitches. K2P2 ribbing repeats every 4 stitches. Setting a stitch multiple ensures your cast-on count fits the pattern cleanly so you don't end with a half-rib.
Tips for getting accurate gauge
- Knit a swatch at least 4 inches × 4 inches in your project pattern.
- Wash and block the swatch — gauge changes after blocking.
- Measure stitches across the middle (not the edges) of the swatch.
- If you're between two gauges, go down a needle size and re-swatch.