How to use this calculator
Make a swatch with your chosen yarn, hook and stitch pattern. Measure the swatch after washing or blocking if applicable. Compare the reference gauge with your own and enter your target dimensions. The calculator computes the approximate number of stitches and rows you will need.
Frequently asked question
Does this automatically rewrite a crochet pattern? No. It provides baseline stitch and row counts. Stitch multiples, increases, decreases, shaping, motifs and construction still require adjustment.
Crochet planning guide
How to calculate crochet gauge
Divide stitches by measured swatch width to find stitches per centimetre. Multiply that rate by your desired project width. Calculate rows separately using swatch height. For example, 21 stitches across 10 cm and a 50 cm width gives 21 ÷ 10 × 50 = 105 stitches.
Pattern gauge versus your gauge
A pattern with 18 stitches across 10 cm differs from a swatch with 21 stitches across 10 cm. Your fabric has more stitches per centimetre and may finish narrower if you follow the original stitch count. Resizing a rectangular panel is more straightforward than resizing a shaped garment.
When to measure a gauge swatch
Crochet a swatch in the actual stitch pattern and yarn. Wash or block it the way the final project will be finished, then measure away from the edges. Recheck your gauge as you work.
What the estimate cannot do
The calculation does not automatically adjust turning chains, stitch multiples, shaping, increases, decreases or garment ease. Follow the pattern construction and round to a compatible stitch repeat where necessary.
Common questions
Does a larger crochet hook change gauge?
Often a larger hook produces larger stitches, but tension, yarn and stitch pattern also matter. Make another swatch rather than relying on a fixed conversion.
Should I measure in inches or centimetres?
Either works if every measurement uses consistent units. This calculator accepts centimetres.