Blood Alcohol Content (BAC) Table: Estimated BAC by Standard drinks
Reference table of estimated BAC for Blood Alcohol Content (BAC) across a range of standard drinks values — exact, engine-computed figures you can read off at a glance.
Blood Alcohol Content (BAC) Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Estimated BAC
0.073
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Blood Alcohol Content (BAC) Calculator
The Blood Alcohol Content (BAC) Calculator works out your estimated bac in an instant. Enter standard drinks, body weight and distribution ratio (0.68 men, 0.55 women) and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the standard drinks.
- Enter the body weight.
- Enter the distribution ratio (0.68 men, 0.55 women).
- Enter the hours since first drink.
- Read off your estimated bac — the calculator updates automatically, with no button to press.
Worked example
For example, with standard drinks of 4, body weight of 80 kg, distribution ratio (0.68 men, 0.55 women) of 0.68 and hours since first drink of 2, the estimated bac is 0.073.
| Standard drinks | 4 |
|---|---|
| Body weight | 80 kg |
| Distribution ratio (0.68 men, 0.55 women) | 0.68 |
| Hours since first drink | 2 |
| Estimated BAC | 0.073 |
|---|
Results are estimates for educational use, not professional advice.
Key terms explained
- Ratio
- A comparison of two quantities showing how many times one contains the other.
Frequently asked questions
This tool uses the Widmark formula: grams of alcohol divided by body water mass, minus the alcohol metabolised over time (about 0.015% per hour).
A standard drink here contains about 14 grams of pure alcohol, roughly a 350 ml beer, 150 ml wine, or 45 ml of spirits.
No. BAC varies with food, metabolism, medication and gender. Treat the result as a rough estimate only and never drive after drinking.
Limits differ by country, often around 0.03% to 0.08%. Many places set zero tolerance for new or commercial drivers.
Enter the standard drinks. Enter the body weight. Enter the distribution ratio (0.68 men, 0.55 women). Enter the hours since first drink. Read off your estimated bac — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Blood Alcohol Content (BAC): Formula, Steps & Examples
Learn how to calculate Blood Alcohol Content (BAC) — the formula explained step by step, with worked examples and a free calculator to check your answer.