Drunk driving, how much is too much? This is probably the most raised question in any discussion about drunk driving! The answer to this simple question is unfortunately not as easy, and is determined by what the legal alcohol limit is. The basic scientific answer is to be found in the Widmark Formula:
People often ask how much they can drink before they go past the limit, here is a “basic” answer:
1 metric tot is 8,4 g of ethyl alcohol.
The average beer contains between 13 – 16 grams of ethyl alcohol.
One beer is therefore ± equivalent of a double eg brandy.
In trials all the participants (Male & Female students) exceeded the legal limit = 0,05g/dl after two beers.
According to the Widmark formula:
A = p x c x 10 x r
A = amount of alcohol in grams
p = mass of the person
x 10 = to convert promille ( parts per thousand) to g/dl or g/%
“r” = Widmark factor which is on average 0,7 for men and 0,6 for females.
c = blood alcohol level.
Blood alcohol level = A divided by p x r x 10.
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