While the only fully accurate way to calculate blood alcohol level (BAC) is through a lab test, this video provides a handy mathematical formula for measuring your own BAC. It is important to remember that men and women metabolize alcohol differently, so any estimates should be adjusted for gender and weight.

The first step in the calculation is to multiply the number of standard drinks consumed by 0.025. Then determine the number of hours that have passed since you finished your last beverage, and subtract 0.025% for every hour that passes. This should give you a rough estimate of your current BAC. Drivers who want to get on the road should wait until their BAC is at or near zero before getting behind the wheel.

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