The National Trial Lawyers

(215) 940-1200

Two Penn Center Plaza

1500 John F.Kennedy Boulevard

Suite 900

Philadelphia, PA 19102

Phone (215) 940-1200

Fax 215-940-2701


Blood Alcohol Content Calculator

Arrested for a DUI in Pennsylvania? Did you take the breathalyzer? Or perhaps you're thinking about having a few drinks and getting behind the wheel. Before doing that, spend a few moments with this BAC calculator to determine your potential for a DUI arrest in Pennsylvania.
Fluid Ounces Consumed (Beer ~ 12 oz. Wine Glass ~ 4 oz. 1 Shot ~ 1.5 oz)
Your Weight (Lbs)
Alcohol Percentage in Beverage (Beer ~ 4-4.5% Wine ~ 15-20% 1 Shot ~ 30-50%)
Hours Spent Drinking

This calculator is to be used for entertainment purposes only.
Please note the disclaimer below.
For more information on this BAC Calculator, please click here.
For a more accurate analysis of BAC readings, use these charts.
Fluid Ounces Consumed
Percent Alcohol
Your Weight (Lbs)
Hours Spent Drinking

Fluid Ounces Consumed Percent Alcohol
Your Weight (Lbs) Hours Consuming Drink
BAC Percentage
BAC Analysis

Blood alcohol concentration (BAC) is the amount of alcohol in the bloodstream. A BAC of .05 means the person has .05 grams of alcohol in every 100 mL of their blood.
As the liver metabolizes alcohol at about one standard drink per hour, the BAC level drops unless more alcohol is consumed. BAC is measured with a breathalyzer, or by analyzing a sample of blood.
Factors affecting your BAC
The more a person drinks, the higher their BAC. But 2 people who drink the same amount might register quite different BACs.

Body size: A smaller person will have a higher BAC than a larger person because the alcohol is concentrated in a smaller body mass.

Empty stomach: Someone with an empty stomach will reach a higher BAC sooner than someone who has just eaten a meal. Food in the stomach slows down the rate at which alcohol passes into the bloodstream.
Body fat: People with a lot of body fat tend to have higher BACs because alcohol is not absorbed into fatty tissue and the alcohol is concentrated in a smaller body mass.
Women: After drinking the same amount of alcohol, a woman will almost always have a higher BAC than a male.
Because of all these variable factors, counting the number of standard drinks you consume can give only a rough guide to your BAC.

DISCLAIMER: The results generated by the BAC Calculator are rough estimates of an average healthy person's BAC assuming typical beverage sizes, recipes and alcohol content. The BAC estimates generated by the BAC Calculator should not be used to infer anyone's fitness to work, drive or perform any other task or duty and is for entertainment purposes only.