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This depends on a few things, including how much you weigh, how much you’ve had to drink and when you started drinking. Using our calculator can give you an idea of how much alcohol might be left in your system but it’s not an alcohol unit calculator nor should it be used in place of sensible caution.
Medical studies suggest that on average, the body removes alcohol at the rate of about one unit per hour. This is an average though, so how your own body processes alcohol will differ.
Our morning after calculator uses a conservative estimate of 1 hour per unit of alcohol consumed, plus an extra hour for the first drink to get into your system.
Also, despite the myths, there’s no way to speed up the process. Drinking coffee or taking a cold shower might make you feel different, but it won’t lower the amount of alcohol in your system.