Crochet Hat Crown Calculator

Round-by-round increase or decrease schedule for hat crowns, worked bottom-up or top-down.

Head Circumference (inches)

Stitches per Inch (gauge)

Starting Ring Stitches

Bottom-up (crown increases) Top-down (crown decreases)

How to Use

Select a standard hat size or enter a custom head circumference.
Enter your stitch gauge (stitches per inch from your swatch).
Choose bottom-up for crown-up construction (magic ring to full circumference) or top-down for decrease schedule (full circumference down to closure).
The calculator outputs round-by-round instructions you can follow directly.

About Hat Construction

Most crochet hats start with a magic ring and increase each round until the crown reaches the target circumference. The number of increases per round equals the starting stitch count (e.g., start with 6 → increase 6 sts each round). After reaching circumference, work even for the body of the hat.

Results are estimates. Actual results vary by gauge, tension, yarn, and hook size.