Blood Alcohol Content (BAC) Calculator
Inputs
lbs
hours
Tab to move between fields
Results
Current BAC
0.0651
Legal StatusUnder Legal Limit
Impairment LevelModerate — reduced coordination, impaired judgment
Time to Sober4.34 hours
Peak BAC0.0801
Standard Drinks3
1
Identify Input Parameters
5 parameters
= Body Weight = 170 lbs, Gender = Male, Drinks = 3, Drink Type = Beer (12 oz, 5%), Hours = 1
= 5 input(s) provided
2
Calculate Alcohol Consumed (grams)
alcoholGrams = drinks × sizeOz × 29.5735 × ABV × 0.789
= 3 × 12 × 29.5735 × 0.05 × 0.789
= 42 g
3
Calculate Peak BAC (Widmark formula)
peakBAC = alcoholGrams / (bodyWeight × 453.592 × r)
= 42 / (170 × 453.592 × 0.68)
= 0.0801
4
Apply Metabolism Over Time
BAC = peakBAC − (0.015 × hours)
= 0.0801 − (0.015 × 1)
= 0.0651
5
Estimate Time to Sober
timeToSober = currentBAC / 0.015
= 0.0651 / 0.015
= 4.34 hours