The blood alcohol calculation estimates a theoretical level from profile, alcohol amount, body weight, meal, drinking pace and elapsed time. It must be read with maximum caution. It must never be used to decide whether driving is possible: only a breathalyzer or official test is reliable, and the only safe driving level is zero.
Estimated BAC = alcohol grams / (body weight × distribution factor) - elimination rate × elapsed time
The engine first calculates grams of pure alcohol: volume in ml × alcohol strength × 0.8 ÷ 100. It then applies a Widmark-type approach: total alcohol ÷ (body weight × distribution coefficient), with 0.68 for the male profile and 0.55 for the female profile. The result is adjusted for meal and drinking pace, then reduced with an indicative elimination rate of 0.12 g/L per hour.
Example matching the default settings: male, 80 kg, 5 glasses of wine, 12.5 cl each at 12%, full meal, consumed over 2 hours. Each glass contains about 12 g of alcohol, or 60 g total. After adjustments and 2 hours of elimination, the displayed estimate is close to 0.73 g/L.
The result is a theoretical blood estimate with substantial uncertainty. As the value rises, alertness, reflexes and judgment are more likely to be impaired. A low value never guarantees fitness to drive or perform risky activity.
The actual amount consumed depends on volume, alcohol strength and number of drinks. A small strong drink can contain as much alcohol as a larger weaker one.
The Widmark approach distributes alcohol according to weight and a profile coefficient. It is a simplified model, not an individual measurement.
A full meal or slower drinking may delay and reduce the estimated peak. It does not make the situation safe or remove alcohol grams.
The engine uses an indicative rate of 0.12 g/L per hour. The real pace varies between people and cannot be accelerated reliably.
The page must not be used to seek permission to drive. After alcohol, arrange a no-driving return or wait with reliable verification.
After heavy or late drinking, alcohol may remain for hours after sleep. Feeling better does not prove a zero level.
A health or wellness calculator gives an order of magnitude based on general formulas. It does not replace diagnosis, medical follow-up or individual assessment, especially during pregnancy, illness, treatment or unusual symptoms. Use the number as preparation for a better-informed discussion, not as a standalone verdict.
Age, height, weight, sex, activity, cycle data or heart rate should be entered carefully. A simple input error can strongly change interpretation for energy needs, heart-rate zones or body markers.
Use the result to follow a trend rather than judge a single day. Sleep, hydration, activity and energy expenditure naturally vary; a consistent average is more useful than a conclusion from one calculation. Recheck the inputs when your routine, weight, training or objective changes.
If the result affects an important medical, nutrition or training decision, confirm it with a qualified professional. Personal context, history and goals can completely change the correct interpretation.
The estimated peak may be lower or later, but alcohol remains present.
The pace factor raises the theoretical peak and associated risk.
Do not drive after drinking; plan taxi, friend, transport or accommodation.
Use a reliable device if consumption was late or heavy.
This page does not replace a breathalyzer, certified device, medical advice or official control. Metabolism, sex, body weight, food, medication, fatigue, health, absorption speed and data accuracy can strongly change the real level. After drinking, do not drive.
No. It must never be used for that. Only reliable testing is authoritative, and the only safe driving level is zero.
Volume in ml × alcohol strength × 0.8 ÷ 100, then multiplied by the number of drinks.
It may slow absorption, but it does not remove alcohol consumed.
It varies. The engine uses an indicative elimination rate, but real situations require reliable measurement.
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