US proof to British proof
Type a value in proof to get it in °UK instantly.
35°UK
That's about the same as fortified wine. A 330 ml serving holds about 6.6 alcohol units.
What it means
How strong is that?
Alcohol units use 10 ml of pure alcohol, the UK and EU standard, for a 330 ml serving. Guidance differs by country.
The math
How to convert proof to °UK
To convert US proof to British proof, multiply by 0.875.
Example: 40 proof × 0.875 = 35 °UK.
In the other direction, 1 °UK = 1.14286 proof.
Every unit
Your strength in every unit
Tables
proof to °UK conversion table
| proof | °UK |
|---|---|
| 3 proof | 2.625 °UK |
| 4 proof | 3.5 °UK |
| 5 proof | 4.375 °UK |
| 8 proof | 7 °UK |
| 12 proof | 10.5 °UK |
| 14 proof | 12.25 °UK |
| 20 proof | 17.5 °UK |
| 30 proof | 26.25 °UK |
| 40 proof | 35 °UK |
| 43 proof | 37.625 °UK |
| 50 proof | 43.75 °UK |
| 57 proof | 49.875 °UK |
| 60 proof | 52.5 °UK |
| 70 proof | 61.25 °UK |
°UK to proof conversion table
| °UK | proof |
|---|---|
| 3 °UK | 3.42857 proof |
| 4 °UK | 4.57143 proof |
| 5 °UK | 5.71429 proof |
| 8 °UK | 9.14286 proof |
| 12 °UK | 13.7143 proof |
| 14 °UK | 16 proof |
| 20 °UK | 22.8571 proof |
| 30 °UK | 34.2857 proof |
| 40 °UK | 45.7143 proof |
| 43 °UK | 49.1429 proof |
| 50 °UK | 57.1429 proof |
| 57 °UK | 65.1429 proof |
| 60 °UK | 68.5714 proof |
| 70 °UK | 80 proof |
Quick answers
Quick answers
- How many °UK is 1 proof?
- 1 proof is 0.875 °UK.
- How many °UK is 10 proof?
- 10 proof is 8.75 °UK.
- How many °UK is 40 proof?
- 40 proof is 35 °UK.
The units
About these units
US proof (proof)
Exactly twice the ABV. A bottle at 80 proof is 40% alcohol.
British proof (°UK)
The historic scale where 100° means 57.15% ABV, from the gunpowder test.
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