When will you be safe to drive?
Wines & spirits
There are several different wine glass sizes and wine comes in different strengths - from 12%-15%.
A 250ml glass of 15% wine - is a four-hour drink.
Drink a bottle of 15% wine - just three 250ml glasses - and you can't drive for 13 hours - 1pm the next day if you finish drinking at midnight.
Measures of spirits
It doesn't matter what mixer you use. The alcohol takes the same amount of time to leave your system whether your vodka's just on ice or in a large glass of orange juice. Pub measures vary - 25ml (one unit) used to be standard, but 35ml is now more common.
• A 25ml shot - is a one-hour drink.
• A 35ml shot - is a one and a half-hour drink.
• A 70ml double - is a three-hour drink.
If you are pouring spirits yourself, you'll probably pour generous doubles, triples or more. Take this into account when calculating your hours.
Men v. Women
It takes exactly the same amount of time for women to lose alcohol from their blood stream as men. Their livers work at the same speed.
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