Head circumference in cm to US sizes
Type a value in cm 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.
Convert the other way: US to cm
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 cm to US
US size = head circumference in inches ÷ π; UK = US − ⅛; the EU size is the circumference in centimeters.
Example: 56.9 cm = 7⅛ US.
Every unit
That hat in every system
Tables
cm to US conversion table
| cm | US |
|---|---|
| 51.9 cm | 6½ US |
| 52.9 cm | 6⅝ US |
| 53.9 cm | 6¾ US |
| 54.9 cm | 6⅞ US |
| 55.9 cm | 7 US |
| 56.9 cm | 7⅛ US |
| 57.9 cm | 7¼ US |
| 58.8 cm | 7⅜ US |
| 59.8 cm | 7½ US |
| 60.8 cm | 7⅝ US |
| 61.8 cm | 7¾ US |
| 62.8 cm | 7⅞ US |
| 63.8 cm | 8 US |
US to cm conversion table
| US | cm |
|---|---|
| 6½ US | 51.8677 cm |
| 6⅝ US | 52.8652 cm |
| 6¾ US | 53.8626 cm |
| 6⅞ US | 54.8601 cm |
| 7 US | 55.8575 cm |
| 7⅛ US | 56.855 cm |
| 7¼ US | 57.8524 cm |
| 7⅜ US | 58.8499 cm |
| 7½ US | 59.8473 cm |
| 7⅝ US | 60.8448 cm |
| 7¾ US | 61.8423 cm |
| 7⅞ US | 62.8397 cm |
| 8 US | 63.8372 cm |
Quick answers
Quick answers
- How many US is 56.9 cm?
- 56.9 cm is 7⅛ US.
The units
About these units
Head circumference in cm (cm)
Your head measured above the ears.
US sizes (US)
Circumference in inches ÷ π, in eighths.
Keep going