Convert us proofs to percent alcohol by volumes
1 proof (US) = 0.5 % ABV — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.5% ABV
As a fraction: 1/2
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1 proof (US) = 0.5 % ABV
Show this value in all 6 alcohol strength units
- Volume fractions v/v 0.005
- Percent alcohol by volumes % ABV 0.5
- Degree Gay-Lussacs °GL 0.5
- Per mille alcohol by volumes ‰ ABV 5
- US proofs proof (US) 1
- British proof (historic)s proof (UK) 0.875
Every row is US proof (proof (US)) converted through the volume fraction, in exact rational arithmetic.
How to convert us proofs to percent alcohol by volumes
Multiply the number of us proofs by 0.5 to get percent alcohol by volumes.
The exact factor is 0.5 — as a fraction, 1/2.
US proof to Percent alcohol by volume conversion table
| US proofs (proof (US)) | Percent alcohol by volumes (% ABV) |
|---|---|
| 1 proof (US) | 0.5 |
| 2 proof (US) | 1 |
| 3 proof (US) | 1.5 |
| 5 proof (US) | 2.5 |
| 10 proof (US) | 5 |
| 20 proof (US) | 10 |
| 25 proof (US) | 12.5 |
| 50 proof (US) | 25 |
| 100 proof (US) | 50 |
| 250 proof (US) | 125 |
| 500 proof (US) | 250 |
| 1000 proof (US) | 500 |
Percent alcohol by volume to US proof conversion table
| Percent alcohol by volumes (% ABV) | US proofs (proof (US)) |
|---|---|
| 1 % ABV | 2 |
| 2 % ABV | 4 |
| 3 % ABV | 6 |
| 5 % ABV | 10 |
| 10 % ABV | 20 |
| 20 % ABV | 40 |
| 25 % ABV | 50 |
| 50 % ABV | 100 |
| 100 % ABV | 200 |
| 250 % ABV | 500 |
| 500 % ABV | 1000 |
| 1000 % ABV | 2000 |
Frequently asked
How many percent alcohol by volumes are in a us proof?
One us proof equals 0.5 percent alcohol by volumes (proof (US) → % ABV). That figure is exact, not rounded.
How do you convert us proofs to percent alcohol by volumes?
Multiply the number of us proofs by 0.5 to get percent alcohol by volumes.
What is 1 % ABV in us proofs?
One percent alcohol by volume is 2 us proofs.
What is 10 proof (US) in % ABV?
10 proof (US) = 5 % ABV.