BAC Calculator - Blood Alcohol Content

Your details

Biological sex affects the Widmark r-factor (body water constant): 0.68 for males, 0.55 for females. This is the largest single factor after body weight.
Your current body weight. Heavier people dilute alcohol across more body water.
lb
Selects the legal blood alcohol limit for driving in your region.
How many hours since you had your first drink. The body metabolises roughly 0.015% BAC per hour.
hours
How many servings of the custom drink you consumed.
mL
%
Estimated BACMild impairment
0.042%

Blood alcohol content as a percentage by weight (Widmark formula)

Time until sober (BAC = 0)2.8hours
Time until legal to drive0hours
Total pure alcohol28grams
Legal driving limit0.08%
0.042 %
Minimal<0.03Mild0.03-0.06Impaired0.06-0.1Significant0.1-0.2Dangerous0.2+

Your estimated BAC is 0.042%.

  • Mild euphoria and relaxation are typical. Concentration and fine motor control begin to decline.
  • At 0.015% eliminated per hour, your BAC reaches 0% in about 2 hr 47 min.
  • Your BAC is below the legal limit of 0.08%, but impairment can occur well below the legal threshold.
  • Only time eliminates alcohol. Coffee, water, and food do not speed sobriety.

Next stepEven below the legal limit, reaction time and judgment are affected. Consider a sober driver or waiting longer.

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