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BAC Level Calculator

Your Profile

Sex
Weight
lbs
154 lbs
Height
ft in
5' 7"
📅 Age
years
Alcohol Tolerance

Drinking Timeframe

🕑 Start time
📅 End time

Food Intake

How much did you eat before/while drinking?

Empty
Barely ate
🍴
Little
Snacks only
🍕
Normal
Regular meal
🥣
A Lot
Full meal
Food slows alcohol absorption and can reduce peak BAC by up to 30%

What did you drink?

Your Results

MINIMAL
0.00‰
Current Blood Alcohol

This is an estimate only. Do not drive or operate machinery if you have consumed alcohol. Individual metabolism varies significantly.

Peak Permille
0.00 ‰
🕐 Estimated Sober
Now
Based on average metabolism rate
Hour-by-Hour Breakdown

Understand BAC impairment levels and what they mean for your body.

Ready to check your BAC?

Use BAC Calculator

Frequently Asked Questions

What BAC level causes impairment?

Impairment begins at very low BAC levels. At 0.02% you may feel relaxed with slight mood changes. At 0.05% you experience lowered alertness and impaired judgment. At 0.08% (the US legal limit) muscle coordination, balance, and reaction time are significantly impaired.

What is a dangerous BAC level?

BAC levels above 0.15% are considered dangerous, with significant impairment to balance, speech, and judgment. Levels above 0.30% can cause loss of consciousness, and levels above 0.40% can be life-threatening.

How fast does BAC decrease?

On average, the body metabolizes alcohol at a rate of about 0.015% (0.15 permille) per hour. This rate varies by individual but cannot be accelerated by coffee, cold showers, or exercise.