US sizes to UK sizes
Type a value in US 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 56.85 cm (22.38 inches) around.
Convert the other way: UK to US
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 US to UK
US size = head circumference in inches ÷ π; UK = US − ⅛; the EU size is the circumference in centimeters.
Example: 7⅛ US = 7 UK.
Every unit
That hat in every system
Tables
US to UK conversion table
| US | UK |
|---|---|
| 6½ US | 6⅜ UK |
| 6⅝ US | 6½ UK |
| 6¾ US | 6⅝ UK |
| 6⅞ US | 6¾ UK |
| 7 US | 6⅞ UK |
| 7⅛ US | 7 UK |
| 7¼ US | 7⅛ UK |
| 7⅜ US | 7¼ UK |
| 7½ US | 7⅜ UK |
| 7⅝ US | 7½ UK |
| 7¾ US | 7⅝ UK |
| 7⅞ US | 7¾ UK |
| 8 US | 7⅞ UK |
UK to US conversion table
| UK | US |
|---|---|
| 6½ UK | 6⅝ US |
| 6⅝ UK | 6¾ US |
| 6¾ UK | 6⅞ US |
| 6⅞ UK | 7 US |
| 7 UK | 7⅛ US |
| 7⅛ UK | 7¼ US |
| 7¼ UK | 7⅜ US |
| 7⅜ UK | 7½ US |
| 7½ UK | 7⅝ US |
| 7⅝ UK | 7¾ US |
| 7¾ UK | 7⅞ US |
| 7⅞ UK | 8 US |
| 8 UK | 8⅛ US |
Quick answers
Quick answers
- How many UK is 7⅛ US?
- 7⅛ US is 7 UK.
The units
About these units
US sizes (US)
Circumference in inches ÷ π, in eighths.
UK sizes (UK)
An eighth below the US size.
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