Understanding Blood Alcohol Content (BAC)

The Blood Alcohol Content (BAC) Calculator is a comprehensive tool designed to estimate the concentration of alcohol in your bloodstream based on several key factors: your body weight, the number of standard drinks consumed, and the time elapsed since your first drink.

A standard drink typically contains about 14 grams of pure alcohol, which is equivalent to:

• 12 oz (355 ml) of regular beer (5% alcohol)
• 5 oz (150 ml) of wine (12% alcohol)
• 1.5 oz (45 ml) of distilled spirits (40% alcohol)

This calculator uses the Widmark formula, which takes into account your body’s water content (approximately 58% of body weight) and the average alcohol elimination rate (about 0.015% per hour). The results provide an estimation that can help you make informed decisions about your alcohol consumption.

BAC Effects Reference:

• 0.02-0.03%: Slight euphoria, loss of shyness
• 0.04-0.06%: Feeling of relaxation, warmth, minor impairment
• 0.07-0.09%: Mild impairment of balance, speech, vision; reduced self-control
• 0.10-0.12%: Significant impairment of motor coordination and judgment
• 0.13-0.15%: Major impairment of motor control, blurred vision
• 0.16-0.20%: Dysphoria predominates, nausea may appear
• 0.25%+: Severe intoxication, potential alcohol poisoning

Important Note: Most jurisdictions set the legal driving limit at 0.08% BAC or lower. Never drive after drinking, and always arrange for a designated driver or alternative transportation when consuming alcohol. This calculator provides estimates only and should not be used as a definitive measure of your fitness to drive or operate machinery.