Florida BAC Calculator: Use the interactive estimator below to calculate an estimated blood alcohol concentration (BAC) based on body weight, sex, drinks, and time spent drinking. It uses a simplified Widmark-style calculation for educational purposes.
Florida law makes it unlawful to drive or be in actual physical control of a vehicle while impaired, and a blood-alcohol level of 0.08 or more grams per 100 milliliters of blood is an unlawful level under Florida Statutes § 316.193. A BAC of 0.08 or higher is also prima facie evidence of impairment under § 316.1934.
Why a BAC Calculator Is Only an Estimate
Widmark-style calculations use assumptions about alcohol distribution and elimination. Actual BAC can vary because of food intake, drink strength and size, absorption, metabolism, medications, medical conditions, timing, and individual physiology. The only way to determine a person’s actual BAC is through an appropriate chemical test. A calculator should never be used to decide whether it is safe or legal to drive.
Florida DUI and BAC Information
Under Florida Statutes § 316.193, DUI law addresses both impairment and specified alcohol levels. A person may be charged based on impairment of normal faculties or a blood- or breath-alcohol level of 0.08 or more. Under § 316.1934, a result of 0.05 or less creates a statutory presumption against impairment; above 0.05 but below 0.08 creates no presumption either way; and 0.08 or higher is prima facie evidence of impairment.
For more information, see our Sarasota DUI Defense page and our Florida Breathalyzer Refusal Law article.
Florida Blood Alcohol Level Calculator
Enter your information for an educational BAC estimate. A standard drink is approximately 12 oz. of 5% beer, 5 oz. of 12% wine, or 1.5 oz. of 40% spirits.
Important: This calculator is only an estimate. It cannot determine actual impairment or predict the result of a breath, blood, or urine test. If you have been drinking, do not drive.
