Ribbing Calculator
Cast-on for a snug ribbed cuff, brim or hem that pulls in.
Result
Cast on 88 sts for the ribbing
8 fewer than the body (rounded to the 4-st repeat), then increase to 96 on the first body round.
Or keep the body count and work the ribbing on a needle one or two sizes smaller — either way the ribbing grips.
Calculated at fibercalc.site/ribbing — free knitting & crochet calculators.
How to use
- Enter the body stitch count — how many stitches the main fabric has.
- Choose your rib pattern so the cast-on rounds to a whole number of repeats.
- Set the pull-in: how much snugger you want the ribbing than the body (10% is a good default for a cuff or hat brim).
- Cast on the number shown for the ribbing, then increase back to the body count on the first plain round.
Good to know
- Ribbing is stretchy and pulls in, so casting on fewer stitches makes a cuff, hat brim or sock top hug rather than flare.
- A simpler alternative is to keep the body count and work the ribbing on a needle one or two sizes smaller — that also pulls it in.
- More pull-in makes a tighter band. Around 10% suits most cuffs and brims; sock cuffs and tight hats can go a little more.
FAQ
- Why does my ribbing flare out?
- Because it has the same stitch count as the body but ribbing naturally wants to pull in — worked at full width it looks loose. Casting on fewer, or using a smaller needle, fixes it.
- How much pull-in should I use?
- About 10% is a reliable default for cuffs and hat brims. For a very snug sock cuff or beanie, try 12–15%; for a barely-gathered edge, less.
- How do I get back to the body stitch count?
- Increase evenly on the first row or round after the ribbing — the Increase / Decrease Evenly calculator spaces those increases for you.