Here is the full formula below🍻

The first thing you need to work out is standard drinks consumed. See formula below,

Standard drinks
0.789 x V x A

V= Volume of drinks in Litres

A= % of alcohol

 

Once you have your standard drinks consumed, you can now work out the estimated BAC with the below formula.

BAC for female 10N-7.5H/5.5M

BAC for males 10N-7.5H/6.8M

Let break this down…

N= number of drinks consumed

H= Number of hours drinking

M= Persons mass in KG

Lets do an example🥳

Say if a male had 6 beers that were 330mls at 4.5% alcohol, my standard drinks are 0.789 x (6×330=1.98Litres) x 4.5= 7.02

Then we can workout the estimated BAC

10 x 7.2(standard drinks) – 7.5 x 3(hours drinking) divided by 6.8 x M(mass in KG’s) = 0.077% BrAC

Note… It’s important to note that these are estimated results. Do not rely on the results to measure your ability to drive after drinking alcohol.

We have a BAC calculator on the bottom of every page to make this easier. Check it out below.⬇️⬇️