Yarn Needed
170 yd
Skeins
1
Hook
5.0–6.0mm
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Inputs
Result
Adult M baseline: 22.5″ circumference × 8.5″ depth. Worsted base 170 yd × 1.0 size factor × 1.0 beanie multiplier = 170 yd.
Inputs
Result
Baby size factor = (16×6) / (22.5×8.5) = 0.50. Bulky base 120 yd × 0.50 × 1.35 slouchy = 81 yd. Rounded result.
An adult medium beanie in worsted weight yarn typically needs 150–200 yards. The exact amount depends on head size, hat style, and stitch pattern.
Worsted weight (#4) is the most popular for hats because it works up quickly and provides good warmth. DK (#3) gives a lighter hat, while bulky (#5) creates a thick winter hat.
Wrap a flexible tape measure around the widest part of the head, just above the ears and eyebrows. This circumference determines the starting chain or magic ring size for the hat crown.
The number of rows depends on yarn weight and the hat depth needed. In worsted weight, an adult hat is typically 20–22 rows of double crochet from crown to brim.
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Last Updated: Mar 19, 2026
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