StitchTip calculator
Hat yarn calculator
Turn a measured swatch into a practical yarn estimate for a fitted crochet or knitted hat.
How hat yarn is estimated
Finished circumference is multiplied by height to approximate fabric area, then swatch yarn consumption is scaled to that area with an optional margin.
Hat yarn example
A hat measuring 56 cm around and 22 cm high has an approximate fabric area of 1,232 cm² before crown shaping.
Frequently asked questions
Does the estimate include a pom-pom?
No. Add a separate allowance for pom-poms, tassels, folded brims or dense colorwork.