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BAC Formula:

$$\text{BAC}_{\text{Female}}\;=\;\frac{\left(10\text{N}\;-\;7.5\text{H}\right)}{5.5\text{M}}$$

$$\text{BAC}_{\text{Male}}\;=\;\frac{\left(10\text{N}\;-\;7.5\text{H}\right)}{6.8\text{M}}$$

Where,

  • BAC shows blood alcohol content.
  • N is the number of standard drinks consumed.
  • H show drinking hours.
  • M is the mass of kilograms.

Blood Alcohol Level Chart for Females

Drinks in 1 hr 100 lbs 120 lbs 140 lbs 160 lbs 180 lbs 200 lbs 220 lbs 240 lbs
1 0.05 0.04 0.03 0.03 0.03 0.02 0.02 0.02
2 0.09 0.08 0.07 0.06 0.05 0.05 0.04 0.04
3 0.14 0.11 0.11 0.09 0.08 0.07 0.06 0.06
4 0.18 0.15 0.13 0.11 0.10 0.09 0.08 0.08
5 0.23 0.19 0.16 0.14 0.13 0.11 0.10 0.09
6 0.27 0.23 0.19 0.17 0.15 0.14 0.12 0.11

Blood Alcohol Level Chart for Males

Drinks in 1 hr 100 lbs 120 lbs 140 lbs 160 lbs 180 lbs 200 lbs 220 lbs 240 lbs
1 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02
2 0.08 0.06 0.05 0.05 0.04 0.04 0.03 0.03
3 0.11 0.09 0.08 0.07 0.06 0.06 0.05 0.05
4 0.15 0.12 0.11 0.09 0.08 0.08 0.07 0.06
5 .19 .16 .13 .12 .11 .09 .09 .08
6 0.23 0.19 0.16 0.14 0.13 0.11 0.10 0.09