6 units · base unit v/v · 1
Alcohol strength converter
US proof is exactly twice the ABV percentage. Historic British proof uses 100 proof for spirit at 4/7 alcohol by volume.
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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.
Common alcohol strength conversions
- % ABV → °GL
- % ABV → proof (US)
- % ABV → proof (UK)
- °GL → % ABV
- °GL → proof (US)
- °GL → proof (UK)
- proof (US) → % ABV
- proof (US) → °GL
- proof (US) → proof (UK)
- proof (UK) → % ABV
- proof (UK) → °GL
- proof (UK) → proof (US)
All alcohol strength units
Each unit expressed in volume fractions (v/v), the unit everything in this category converts through.
| Unit | Symbol | System | Value in v/v |
|---|---|---|---|
| Volume fraction | v/v | SI | 1 |
| Percent alcohol by volume | % ABV | metric | 0.01 |
| Degree Gay-Lussac | °GL | metric | 0.01 |
| Per mille alcohol by volume | ‰ ABV | metric | 0.001 |
| US proof | proof (US) | us | 0.005 |
| British proof (historic) | proof (UK) | historic | 0.00571428571429 |
About alcohol strength units
Convert alcohol by volume, volume fraction, US proof and historic British proof.
US proof is exactly twice the ABV percentage. Historic British proof uses 100 proof for spirit at 4/7 alcohol by volume.
Dimensional formula: 1. Every conversion on this page goes through the volume fraction, using exact fractions rather than decimal approximations. Read how that works →