the United Kingdom · 1 × 568 ml at 4.5 %
How many units in a pint?
Estimated with the model behind the Abvy app. As of September 2026.
The answer
≈2.6units
units of alcohol in a pint (20 g of pure alcohol). Below: what they do to a 80 kg man after a light meal, first drink at 20:00.
| peak | 20:52 0.21‰ |
|---|---|
| stays under 0.8‰ | the whole evening |
| back to zero | 23:05 after 3 h 10 min |
| pure alcohol | 20 g |
Rounded to ten minutes.
How this was calculated
568 ml at 4.5 % alcohol, started at 20:00 and sipped over 30 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 | 0.29‰ | 3 h 40 min |
| 60 kg | 0.26‰ | 3 h 30 min |
| 70 kg | 0.23‰ | 3 h 20 min |
| 80 kg | 0.21‰ | 3 h 10 min |
| 90 kg | 0.19‰ | 3 h |
| 100 kg | 0.17‰ | 2 h 50 min |
| Weight | Peak | Back to zero |
|---|---|---|
| 50 kg | 0.37‰ | 4 h 20 min |
| 60 kg | 0.33‰ | 4 h |
| 70 kg | 0.30‰ | 3 h 50 min |
| 80 kg | 0.28‰ | 3 h 40 min |
| 90 kg | 0.26‰ | 3 h 30 min |
| 100 kg | 0.24‰ | 3 h 20 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 Kingdom
0.8‰ is the limit for drivers in the United Kingdom (GOV.UK, "Drink drive limits"). 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 3 h 10 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.