The formula
your stitches = pattern stitches × your gauge ÷ pattern gauge
Both gauges must be stitches over the same length (both per 4 inches or both per 10 cm). A denser gauge of yours means more stitches for the same width.
Example: a pattern asks for 110 stitches at 22 stitches per 4 inches, but you get 20. You need 110 × 20 ÷ 22 = 100 stitches for the same width.
If you knit it as written
The finished width scales with pattern gauge ÷ your gauge. At 20 stitches instead of 22 you would end up at 22 ÷ 20 = 110% of the intended width. At 24 stitches per 4 inches you would end up at 22 ÷ 24 ≈ 91.7%.
Cautions
- Changing the stitch count also changes shaping, necklines and stitch pattern repeats. Adjust those too, or change needle size to match the pattern gauge instead.
- Row gauge affects length in the same way; convert row counts with the same formula using row gauges.
Frequently asked questions
Should I change needle size or the stitch count?
Changing the needle size to hit the pattern gauge is simplest. Adjust stitch counts only when you like the fabric you get at a different gauge.
What if my gauge has more stitches than the pattern?
The piece will come out smaller if knit as written. With 24 stitches per 4 inches instead of 22 it is about 91.7% of the intended size.
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