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BAC Calculator

Blood Alcohol Content Calculator

No online BAC Calculator should be used to determine an individuals fitness to drive. There are so many variables and factors that can affect a specific individuals BAC level at any given time that the only fail-safe and reliable way to calculate an individuals blood alcohol level at a precise moment in time is by blood analysis or a reliable and type approved breathalyser. This BAC calculator provides reliable estimates based on average biological values and scientific research and should be used for educational, research and information purposes only. If in doubt, use common sense and do not drive.


The Drinkdriving.org Blood Alcohol Calculator

The Drinkdriving.org BAC calculator is based on the widmark method of calculating blood alcohol content. The BAC calculator provides an accurate estimation of an individuals BAC at a certain period in time.

Like any other online BAC calculator it cannot provide results with 100% accuracy due to the many variables that come into play (see below) that can affect an individuals BAC level.

While the calculator takes into account age, gender, weight, drink amount, alcohol percentage and the period of time over which any alcohol has been consumed, it is based on the consumption of alcohol by an average healthy human being.

What is BAC - Blood Alcohol Content?

Blood alcohol content is a measure of the amount of alcohol present in a certain amount of blood. It is usually described as the amount of alcohol in mg per 100ml of blood. The maximum prescribed legal drink driving limit in England and Wales is 80mg/100ml blood or 0.08% and in Scotland it is 50mg/100ml blood or 0.05%.

What is the legal drink driving limit in the UK?

LEGAL DRINK DRIVING LIMIT IN ENGLAND & WALES, UK

England & Wales Drink Driving Limit

The maximum BAC (blood alcohol content) limit in England & Wales is:

35 micrograms of alcohol in 100 millilitres of breath
OR
80 milligrams of alcohol per 100 millilitres of blood
OR
107 milligrams of alcohol per 100 millilitres of urine

LEGAL DRINK DRIVING LIMIT IN SCOTLAND, UK

Scotland Drink Driving Limit

The maximum BAC (blood alcohol content) limit in Scotland is:

22 micrograms of alcohol in 100 millilitres of breath
OR
50 milligrams of alcohol per 100 millilitres of blood
OR
67 milligrams of alcohol per 100 millilitres of urine

It is a criminal offence to drive with a blood alcohol level that exceeds the maximum prescribed legal limit.


FACTORS THAT AFFECT YOUR BAC (Blood Alcohol Content)

Numerous factors can affect an individuals BAC, these include:

REMEMBER THE ONLY 100% SAFE ALCOHOL DRIVING LIMIT IS 0

IF YOU INTEND TO DRINK ALCOHOL - STAY SAFE AND DONT DRIVE!!

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