Please don't use the Confused.com morning after calculator in the place of sensible caution. If you're drinking, don't drive. If you're driving, don't drink.

No blood alcohol calculator is 100% accurate, as a number of factors will affect how your body processes alcohol. Use the tool for reference purposes only, You shouldn't use it to determine whether you're fit to drive. We can't emphasise this enough, if in doubt, do not drive.