One standard drink is about 14 g of pure alcohol (roughly 12 oz beer, 5 oz wine or 1.5 oz spirits). This estimate bac calculator assumes the typical serving sizes shown above.
Enter your sex, weight, number of standard drinks and hours since you started drinking, then let this estimate bac calculator show how your blood alcohol concentration might change over time.
This bac calculator is an educational bac alcohol calculator that uses the Widmark equation to estimate blood alcohol concentration based on your sex, weight, drinking pattern and time. It is a bac level calculator and alcohol bac calculator that shows how your estimated BAC might change after a night out, but it cannot replace real-world testing or legal advice.
The bac calculator asks for your biological sex, body weight in pounds, number of standard drinks and hours since you started drinking. As an estimate bac calculator, it assumes one standard drink is about 14 grams of pure alcohol and converts that into fluid ounces for the Widmark formula.
This bac level calculator uses the Widmark equation with different distribution ratios for men and women to estimate BAC. Even the most accurate bac calculator online is still an approximation, because real blood alcohol concentration depends on individual metabolism, health, medications and many other factors.
The alcohol bac calculator subtracts a typical metabolism rate of about 0.015 BAC per hour after drinking stops. This means your estimated BAC gradually decreases over time, but this bac alcohol calculator cannot predict exactly when you are safe to drive or work.
This bac calculator and estimate bac calculator multiplies the total alcohol from your standard drinks by a distribution factor based on your sex and weight, then subtracts a typical metabolism rate over time. It is a bac alcohol calculator based on the Widmark equation, but real BAC can still be higher or lower than the estimate.
No online bac level calculator or alcohol bac calculator can replace breathalyzer tests or blood tests. Even the most accurate bac calculator is only an approximation and should never be used to decide whether you can drive, work with machinery or perform safety-critical tasks.
This bac level calculator assumes standard drinks of about 14 grams of pure alcohol, a fixed distribution ratio for men and women and a metabolism rate of 0.015 BAC per hour. Because your body may process alcohol differently, this estimate bac calculator should be treated as a rough guide only.
No. This alcohol bac calculator is for information only and cannot guarantee that you are under the legal limit or safe to drive. Laws vary by country and state, and impairment can begin well before 0.08 BAC, so always choose a sober driver and avoid driving after drinking.
Use this bac calculator as a planning and education tool to understand how alcohol may affect your BAC over time. It is not a license to drink more. If you have any doubt, treat the estimate as lower than your real BAC and avoid driving, working at heights or making important decisions after drinking.