A top-down crochet hat is a flat circle that stops growing at the right diameter, then falls straight. Pick the head (or enter one), add your gauge, the crown rounds, the stop point, and the body length all follow.
Head and Gauge
Stop Increasing At
60stitches
hat around 19.8 in · 5 increase rounds
Crown: the flat circle rounds to 60 stitches, then work even until the hat measures 8 in, and rib the brim.
- Crown stops at5.9 in across
- Increase rounds5 (+12 each)
- Beanie height, about8 in
- Even rounds after the crownto 8 in total
The Formulas
hat around = head × (1 − ease) · crown stops when its circumference = hat aroundcrown diameter at the stop = hat around ÷ π · rounds = final stitches ÷ increases per roundOnce the flat circle’s edge measures the hat’s circumference, every later round works even and the fabric turns the corner by itself. The stop diameter is the number to tape-measure against: circumference ÷ π.
Worked Example
An adult hat (22 in head), dc crown, 13 sts per 4 in, 10% ease:
- Hat around: 22 × 0.9 = 19.8 in → 19.8 × 3.25 = 64.4, snapped to the dc crown’s multiple of 12 → 60 stitches.
- Crown: 60 ÷ 12 = 5 increase rounds, stopping when the flat circle tapes 5.9 in across.
- Then work even to 8 in total height for a beanie, about 6 more dc rounds, and rib the brim.
Hat Sizes, All Heads
Typical head sizes with hat circumference at 10% ease and beanie heights: crown to brim.
| Size | Head | Hat around | Beanie height |
|---|---|---|---|
| Newborn | 14″ | 12.6″ | 5″ |
| Baby | 16″ | 14.4″ | 5.5″ |
| Toddler | 18″ | 16.2″ | 6.5″ |
| Child | 20″ | 18.0″ | 7″ |
| Teen | 21″ | 18.9″ | 7.5″ |
| Adult | 22″ | 19.8″ | 8″ |
| Large adult | 23.5″ | 21.2″ | 8.5″ |
How to Measure
- Head: tape above the ears and across mid-forehead: where the hat will sit.
- Check the crown flat: at the stop round, the circle should tape circumference ÷ π across. Bigger: frog a round. Smaller: one more.
- Height measures from the crown’s center down; slouch hats add 2–3 in of even rounds past the beanie height.
Assumptions and Defaults
- Top-down, flat-circle crown at the standard +6/+8/+12 per round.
- Stitch counts snap to the crown’s increase multiple.
- Ribbed brims (slip stitch or post-stitch) pull in: work them on the same count.
Hat Questions, Answered
How many stitches go around a crochet hat?
A crochet hat has the head circumference × 0.9 × your stitches per inch around, rounded to the crown’s multiple, which gives 64 dc for an adult at 3.25 stitches per inch. The crown increases until it reaches that count, and then the hat is worked even.
When do I stop increasing a crochet hat crown?
You stop increasing the crown when the flat circle measures the hat circumference ÷ π across, about 6.3 in for an adult, or when your stitch count reaches the number above. Both checks agree when your gauge is accurate, so either one tells you it is time to work even.
How tall is a crochet beanie?
An adult crochet beanie is about 8 in from crown to brim, while toddler beanies run about 6½ in and newborn beanies about 5 in. Slouchy styles add 2 to 3 in of even rounds, and the chart carries every size.
Why does my crochet hat flare at the bottom?
A crochet hat flares at the bottom when the crown has one increase round too many, so the circle never turns into a tube. Undo back to the stop count and work even from there; the change from circle to cylinder happens on its own once the increases stop.