Head circumference in cm to UK sizes
Type a value in cm to get it in UK instantly.
7UK
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: UK 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 UK
US size = head circumference in inches ÷ π; UK = US − ⅛; the EU size is the circumference in centimeters.
Example: 56.9 cm = 7 UK.
Every unit
That hat in every system
Tables
cm to UK conversion table
| cm | UK |
|---|---|
| 51.9 cm | 6⅜ UK |
| 52.9 cm | 6½ UK |
| 53.9 cm | 6⅝ UK |
| 54.9 cm | 6¾ UK |
| 55.9 cm | 6⅞ UK |
| 56.9 cm | 7 UK |
| 57.9 cm | 7⅛ UK |
| 58.8 cm | 7¼ UK |
| 59.8 cm | 7⅜ UK |
| 60.8 cm | 7½ UK |
| 61.8 cm | 7⅝ UK |
| 62.8 cm | 7¾ UK |
| 63.8 cm | 7⅞ UK |
UK to cm conversion table
| UK | cm |
|---|---|
| 6½ UK | 52.8652 cm |
| 6⅝ UK | 53.8626 cm |
| 6¾ UK | 54.8601 cm |
| 6⅞ UK | 55.8575 cm |
| 7 UK | 56.855 cm |
| 7⅛ UK | 57.8524 cm |
| 7¼ UK | 58.8499 cm |
| 7⅜ UK | 59.8473 cm |
| 7½ UK | 60.8448 cm |
| 7⅝ UK | 61.8423 cm |
| 7¾ UK | 62.8397 cm |
| 7⅞ UK | 63.8372 cm |
| 8 UK | 64.8346 cm |
Quick answers
Quick answers
- How many UK is 56.9 cm?
- 56.9 cm is 7 UK.
The units
About these units
Head circumference in cm (cm)
Your head measured above the ears.
UK sizes (UK)
An eighth below the US size.
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