BAC Estimator
Advice-only estimate based on your inputs. Do not use this to decide whether to drive.
Your details
Weight (lb)
Sex
Male
Female
Hours since first drink
0.5h
1h
2h
Elimination rate β (g/dL·h)
Typical range 0.010–0.020. Default 0.015.
Drinks
Size (oz)
ABV (%)
Remove
+ Add drink
1 U.S. standard drink ≈ 14 g alcohol (e.g., 12 oz 5% beer).
Estimate
0.01 g/dL
1.0 standard drinks • total alcohol 14 g
Earliest ~0.05
≤ now
Earliest ~0.00
0.7h • 4:09 AM
This is only an estimate. People can be impaired even below legal limits. Do not drive after drinking.
For education only. Laws vary by location. Always choose a safe ride.