Convert percent alcohol by volumes to british proof (historic)s
1 % ABV = 1.75 proof (UK) — 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 0.01
- Percent alcohol by volumes % ABV 1
- Degree Gay-Lussacs °GL 1
- Per mille alcohol by volumes ‰ ABV 10
- US proofs proof (US) 2
- British proof (historic)s proof (UK) 1.75
Every row is Percent alcohol by volume (% ABV) converted through the volume fraction, in exact rational arithmetic.
How to convert percent alcohol by volumes to british proof (historic)s
Multiply the number of percent alcohol by volumes by 1.75 to get british proof (historic)s.
The exact factor is 1.75 — as a fraction, 7/4.
British proof (historic): Historic convention: 100 proof equals 4/7 alcohol by volume. Modern UK labels use ABV.
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 |
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 |
Frequently asked
How many british proof (historic)s are in a percent alcohol by volume?
One percent alcohol by volume equals 1.75 british proof (historic)s (% ABV → proof (UK)). That figure is exact, not rounded.
How do you convert percent alcohol by volumes to british proof (historic)s?
Multiply the number of percent alcohol by volumes by 1.75 to get british proof (historic)s.
What is 1 proof (UK) in percent alcohol by volumes?
One british proof (historic) is 0.5714285714 percent alcohol by volumes.
What is 10 % ABV in proof (UK)?
10 % ABV = 17.5 proof (UK).
What exactly is a british proof (historic)?
Historic convention: 100 proof equals 4/7 alcohol by volume. Modern UK labels use ABV.