To be safe, drivers should ensure they are completely sober before driving – including the following day.
There’s no way of knowing exactly how long it takes to sober up completely after drinking, but it’s longer than many people think. As a rough guide drivers should allow at least one hour to absorb alcohol, plus at least one hour for each unit consumed – but it can take longer, so it’s wise to leave extra time to be safe. Our morning-after calculator shows how long it can take to be alcohol-free after a few drinks.
Please note: the calculator requires a Flash-enabled browser.