Blood Alcohol Calculator

Estimate your blood alcohol concentration based on drinks consumed, body weight, sex, and time elapsed.

🍺 Blood Alcohol Calculator

Results

Est. BAC0.058%
StatusImpaired
Est. Time to Sober3.9 hours

πŸ’‘ How BAC Is Estimated

BAC uses the Widmark formula: BAC = (alcohol consumed in grams / (body weight Γ— distribution factor)) βˆ’ (0.015 Γ— hours). Distribution factor: 0.68 for males, 0.55 for females. One standard drink = 14g pure alcohol.

BAC of 0.05% = mildly impaired. 0.08% = legally drunk in many countries. 0.15%+ = severely impaired. The body metabolises alcohol at roughly 0.015% per hour β€” this rate is fixed and cannot be sped up.

70 kg male, 3 standard drinks over 2 hours: estimated BAC β‰ˆ 0.04%. Time to fully sober: β‰ˆ 2.6 hours.

Blood Alcohol Calculator FAQ

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