How to Calculate Blood Alcohol Level

Alcohol level in blood is a measure of how much alcohol is in your blood, determined as percentage. A higher blood alcohol concentration (BAC) is, the more intoxicated an individual is. Different states have different laws regarding the maximum BAC allowed before someone is considered legally intoxicated. Driving while in excess of the legal blood alcohol alcohol limit can cause you to be charged by police with driving while intoxicated, which can cost you your license and perhaps send you to jail. You can estimate your alcohol level based on your weight and the number of drinks you've consumed.

Instructions

• 1

  Weigh yourself. Your blood alcohol level is dependent upon two factors; your weight and the amount of alcohol in the drinks. For the example, assume a weight of 100 pounds.

• 2

  Count the number of drinks you've consumed. One drink is equal to a 12-ounce bottle of beer, one glass of wine or an ounce of 100-proof liquor (about what you'd find in an average mixed drink).

• 3

  Calculate the blood alcohol level based on your weight. This number is .038 for every drink for a 100-pound person. Every additional 10 pounds decreases this number by .02 or .03. For example, a 150-pound person would have a blood alcohol level of .025 after one drink.

• 4

  Add the number of drinks consumed to calculate your alcohol level, then subtract the number of hours that have passed since you consumed your last drink. Multiply the number of hours by .015, which is the amount of alcohol the body processes each hour, according to DrunkDrivingDefense.com. For example, a 150-pound person who's had four drinks would have a blood alcohol level of .10. If it has been two hours since his last dink, two hours times .015 equals .03--and .10 minus .03 gives a blood alcohol level of .07.