Alcohol calculator
Estimate your blood alcohol level in per mille, how long it takes to sober up and when you drop below the 0.2 ‰ driving limit. Everything is calculated in your browser.
Level of intoxication
| 0–0.2 ‰ | Sober or minimal Practically no effect. You may drive only once the level is below 0.2 ‰. |
|---|---|
| 0.2–0.5 ‰ | Mild effect Slower reactions and less self-criticism. In Estonia driving at this level is already prohibited. |
| 0.5–1.5 ‰ | Light intoxication Muscles relax, mood lifts, you become talkative and active, concentration gets worse. |
| 1.5–2.5 ‰ | Moderate intoxication Slurred speech, poor coordination, possible irritability and short memory gaps. |
| 2.5–3 ‰ | Heavy intoxication Loss of coordination, confused speech, possible memory loss and loss of consciousness. |
| 3–5 ‰ | Alcohol poisoning Life-threatening. Call 112 for help. |
| > 5.0 ‰ | Potentially fatal level A level that can be fatal. Call an ambulance on 112 immediately. |
How the calculator works
- 1Widmark formulaPer mille = pure alcohol (g) / (weight × r). Pure alcohol = volume (ml) × strength (%) / 100 × 0.789.
- 2Body water factor rCalculated with the Seidl formula from your sex, weight and height. On average r is about 0.7 for men and about 0.6 for women.
- 3Empty or full stomachOn an empty stomach about 90% of the alcohol is absorbed, after a meal about 70%, so the peak is lower and comes later.
- 4Sobering upThe body breaks down about 0.15 per mille an hour on average. Coffee, a cold shower or sleep do not speed it up.
The result is an estimate, not evidence, and does not replace a breathalyser. The rate at which alcohol is broken down varies from person to person. The calculator is for adults (18+). Drinking too much harms your health.
Frequently asked questions
How many per mille is one beer?
A 0.5 l bottle of 5% beer gives an 80 kg man about 0.3 and a 60 kg woman about 0.5 per mille. The calculator gives an exact estimate for your weight and height.
How fast does alcohol leave the body?
On average about 0.15 per mille an hour, so 1 per mille takes roughly 6–7 hours.
When can I drive after drinking?
In Estonia only when your blood alcohol is below 0.2 per mille. The calculator shows an estimate, but only a breathalyser can tell you for sure.
Does the calculator save my data?
No. The calculation runs in your browser and nothing is sent anywhere.
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