BAC Calculator

Blood Alcohol Concentration (BAC) Calculator

Blood Alcohol Concentration (BAC) describes the amount of alcohol circulating in your bloodstream at a given time. It reflects how much alcohol has entered your system compared to how quickly your body can process it. BAC is influenced by many factors, including how much you drink, how fast you drink, your body composition, and whether you’ve eaten. While breath or blood tests provide the most accurate readings, BAC calculators can help estimate impairment levels and raise awareness of how alcohol affects the body.

Male / Female BAC Charts

Alcohol affects men and women differently due to variations in body water, enzymes, and hormones. Women often reach higher BAC levels than men after consuming the same amount of alcohol, even at similar weights, because alcohol is less diluted and metabolized more slowly. As a result, impairment can occur faster and last longer, while high alcohol intake poses serious risks for everyone.

Male

Female

BAC (%)	Typical Effects	Safety & Driving Impact
0.01 – 0.03	Mild relaxation, subtle mood changes	Judgment may begin to shift
0.04 – 0.06	Lowered inhibitions, increased talkativeness	Reduced attention and response ability
0.07 – 0.09	Delayed reactions, reduced coordination	Unsafe to drive; impaired decision-making
0.10 – 0.14	Slurred speech, poor balance, emotional shifts	High crash risk
0.15 – 0.19	Confusion, nausea, major coordination loss	Inability to drive safely
0.20 – 0.29	Disorientation, memory gaps	Extreme danger
0.30 – 0.39	Stupor, suppressed reflexes	Life-threatening impairment
0.40+	Loss of consciousness	High risk of coma or death