Drink driving limit question

So i heard Amy winehouses toxicology report and she was classed as more than five times the drunk driving limit.

This amount of alcohol in her blood was said to be in the category of potentially fatal

My question is how do they work it our to be 5 x the driving limit?? in the UK the driving limit is roughly 0.5-2 pints of beer (depending on size etc etc)

So for example if we went with 2 pints as our drive limit then multiply it by 5 = 10 pints (doesn't add up to me as a fatal amount)

can someone explain it?

" in the UK the driving limit is roughly 0.5-2 pints of beer"

Rubbish.

In the UK, the alcohol limit for drivers is 80mg of alcohol per 100ml of blood, 35mcg per 100ml of breath or 107mg per 100ml of urine.

Therefore if you have 160mg in 100ml of blood you are twice the limit, 240mg, three times the limit, etc.

There is no way of knowing the number of drinks that you can have because all alcohol has different abvs, and all people are different. But I think that your blood can only be 0.05% alcohol until you go over the limit. But this is normally about 1 or 2 pints for people.

Depends on your state.
In states that are more strict on alcoholic beverages, the drinking and driving limits are also more strict.