Head circumference in inches to US sizes
Type a value in in to get it in US instantly.
7⅛US
That's 1.02× as large as an average woman’s head, while an average man’s head is 1.02× larger. That fits a head of about 56.9 cm (22.4 inches) around.
What it means
Where does that size sit?
Measure around the head just above the ears and eyebrows. Between sizes, take the larger one; fitted caps run small.
The math
How to convert in to US
US size = head circumference in inches ÷ π; UK = US − ⅛; the EU size is the circumference in centimeters.
Example: 22.4 in = 7⅛ US.
Every unit
That hat in every system
Tables
in to US conversion table
| in | US |
|---|---|
| 20.4 in | 6½ US |
| 20.8 in | 6⅝ US |
| 21.2 in | 6¾ US |
| 21.6 in | 6⅞ US |
| 22 in | 7 US |
| 22.4 in | 7⅛ US |
| 22.8 in | 7¼ US |
| 23.2 in | 7⅜ US |
| 23.6 in | 7½ US |
| 24 in | 7⅝ US |
| 24.3 in | 7¾ US |
| 24.7 in | 7⅞ US |
| 25.1 in | 8 US |
US to in conversion table
| US | in |
|---|---|
| 6½ US | 20.4204 in |
| 6⅝ US | 20.8131 in |
| 6¾ US | 21.2058 in |
| 6⅞ US | 21.5984 in |
| 7 US | 21.9911 in |
| 7⅛ US | 22.3838 in |
| 7¼ US | 22.7765 in |
| 7⅜ US | 23.1692 in |
| 7½ US | 23.5619 in |
| 7⅝ US | 23.9546 in |
| 7¾ US | 24.3473 in |
| 7⅞ US | 24.74 in |
| 8 US | 25.1327 in |
Quick answers
Quick answers
- How many US is 22.4 in?
- 22.4 in is 7⅛ US.
The units
About these units
Head circumference in inches (in)
The same measurement in inches.
US sizes (US)
Circumference in inches ÷ π, in eighths.
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