US sizes to EU sizes
Type a value in US to get it in EU instantly.
54.41EU
That's 1.05× as big as an average women’s ring, while an average men’s ring is 1.1× bigger. That is about 17.32 mm across the inside.
Convert the other way: EU to US
What it means
How big is that ring?
Measure a ring that fits across its inside, or wrap a strip of paper around the finger. Fingers swell in heat, so measure warm.
The math
How to convert US to EU
Each scale steps differently: EU = circumference in mm, US = (circumference − 36.54) ÷ 2.55, and the diameter is the circumference divided by π.
Example: 7 US = 54.4115 EU.
Every unit
Your ring size in every system
Tables
US to EU conversion table
| US | EU |
|---|---|
| 3 US | 44.1975 EU |
| 4 US | 46.751 EU |
| 5 US | 49.3045 EU |
| 6 US | 51.858 EU |
| 7 US | 54.4115 EU |
| 8 US | 56.965 EU |
| 9 US | 59.5185 EU |
| 10 US | 62.072 EU |
| 11 US | 64.6255 EU |
| 12 US | 67.179 EU |
| 13 US | 69.7325 EU |
EU to US conversion table
| EU | US |
|---|---|
| 44.2 EU | 3.00098 US |
| 46.8 EU | 4.01919 US |
| 49.3 EU | 4.99824 US |
| 51.9 EU | 6.01645 US |
| 54.4 EU | 6.9955 US |
| 57 EU | 8.01371 US |
| 59.5 EU | 8.99276 US |
| 62.1 EU | 10.011 US |
| 64.6 EU | 10.99 US |
| 67.2 EU | 12.0082 US |
| 69.7 EU | 12.9873 US |
Quick answers
Quick answers
- How many EU is 1 US?
- 1 US is 39.0905 EU.
- How many EU is 10 US?
- 10 US is 62.072 EU.
- How many EU is 7 US?
- 7 US is 54.4115 EU.
The units
About these units
US sizes (US)
American numeric sizes, stepping 2.55 mm of circumference each whole size.
EU sizes (EU)
The ISO standard, equal to the inner circumference in millimeters.
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