the United States · 1 × 355 ml at 5 %
What is your BAC after one beer?
Estimated with the model behind the Abvy app. As of September 2026.
The answer
≈0.013% BAC
peak for a 80 kg man, light meal, first drink at 20:00
| peak | 20:44 0.13‰ |
|---|---|
| stays under 0.8‰ | the whole evening |
| back to zero | 22:25 after 2 h 30 min |
| pure alcohol | 14 g |
Rounded to ten minutes.
How this was calculated
355 ml at 5 % alcohol, started at 20:00 and sipped over 25 minutes, for a 80 kg man who had a light meal beforehand - the same pharmacokinetic model the Abvy app runs, not a rule of thumb. Real values vary by roughly ±20-30 % with hydration, medication and genetics, so read the number as the middle of a range.
The same drinks for other bodies
Body water decides how far the same alcohol spreads: a lighter person or a woman reaches a higher peak from identical drinks and needs longer to get back to zero.
| Weight | Peak | Back to zero |
|---|---|---|
| 50 kg | 0.18‰ | 2 h 50 min |
| 60 kg | 0.16‰ | 2 h 40 min |
| 70 kg | 0.15‰ | 2 h 30 min |
| 80 kg | 0.13‰ | 2 h 30 min |
| 90 kg | 0.12‰ | 2 h 20 min |
| 100 kg | 0.11‰ | 2 h 10 min |
| Weight | Peak | Back to zero |
|---|---|---|
| 50 kg | 0.24‰ | 3 h 10 min |
| 60 kg | 0.21‰ | 3 h |
| 70 kg | 0.19‰ | 3 h |
| 80 kg | 0.18‰ | 2 h 50 min |
| 90 kg | 0.16‰ | 2 h 40 min |
| 100 kg | 0.15‰ | 2 h 30 min |
Rounded to ten minutes. Enter your own weight, meal and pace in the calculator to see your evening as a curve.
The legal limit in the United States
0.8‰ is the limit for drivers in the United States (NHTSA, "Drunk Driving"). The estimate above says nothing about whether you may drive: reaction time and judgement suffer well below the limit, the model has a wide margin, and a breathalyser measures where this page only estimates. The only safe number for driving is zero.
For a 80 kg man the model lands back at zero about 2 h 30 min after the first drink and never reaches 0.8‰ at this pace. A lighter body, an empty stomach or a faster pace push the peak up and the zero later; the table above shows the spread.
Abvy runs this estimate live while you drink: every glass you log moves the curve and the time you'll be back at zero.
iPhone beta on TestFlight
Android beta on Google PlayAbvy estimates - it never measures. It is not a breathalyzer and can't tell you whether you're under a legal limit or fit to drive.