Convert british proof (historic)s to percent alcohol by volumes
1 proof (UK) = 0.571428571429 % ABV — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 6 alcohol strength units
- Volume fractions v/v 0.005 714 285 714 29
- Percent alcohol by volumes % ABV 0.571 428 571 429
- Degree Gay-Lussacs °GL 0.571 428 571 429
- Per mille alcohol by volumes ‰ ABV 5.714 285 714 29
- US proofs proof (US) 1.142 857 142 86
- British proof (historic)s proof (UK) 1
Every row is British proof (historic) (proof (UK)) converted through the volume fraction, in exact rational arithmetic.
How to convert british proof (historic)s to percent alcohol by volumes
Multiply the number of british proof (historic)s by 0.571428571429 to get percent alcohol by volumes.
British proof (historic): Historic convention: 100 proof equals 4/7 alcohol by volume. Modern UK labels use ABV.
British proof (historic) to Percent alcohol by volume conversion table
| British proof (historic)s (proof (UK)) | Percent alcohol by volumes (% ABV) |
|---|---|
| 1 proof (UK) | 0.571 428 57 |
| 2 proof (UK) | 1.142 857 1 |
| 3 proof (UK) | 1.714 285 7 |
| 5 proof (UK) | 2.857 142 9 |
| 10 proof (UK) | 5.714 285 7 |
| 20 proof (UK) | 11.428 571 |
| 25 proof (UK) | 14.285 714 |
| 50 proof (UK) | 28.571 429 |
| 100 proof (UK) | 57.142 857 |
| 250 proof (UK) | 142.857 14 |
| 500 proof (UK) | 285.714 29 |
| 1000 proof (UK) | 571.428 57 |
Percent alcohol by volume to British proof (historic) conversion table
| Percent alcohol by volumes (% ABV) | British proof (historic)s (proof (UK)) |
|---|---|
| 1 % ABV | 1.75 |
| 2 % ABV | 3.5 |
| 3 % ABV | 5.25 |
| 5 % ABV | 8.75 |
| 10 % ABV | 17.5 |
| 20 % ABV | 35 |
| 25 % ABV | 43.75 |
| 50 % ABV | 87.5 |
| 100 % ABV | 175 |
| 250 % ABV | 437.5 |
| 500 % ABV | 875 |
| 1000 % ABV | 1750 |
Frequently asked
How many percent alcohol by volumes are in a british proof (historic)?
One british proof (historic) equals 0.5714285714 percent alcohol by volumes (proof (UK) → % ABV). That figure is exact, not rounded.
How do you convert british proof (historic)s to percent alcohol by volumes?
Multiply the number of british proof (historic)s by 0.571428571429 to get percent alcohol by volumes.
What is 1 % ABV in british proof (historic)s?
One percent alcohol by volume is 1.75 british proof (historic)s.
What is 10 proof (UK) in % ABV?
10 proof (UK) = 5.714 285 7 % ABV.
What exactly is a british proof (historic)?
Historic convention: 100 proof equals 4/7 alcohol by volume. Modern UK labels use ABV.