Calculate when you are sober again after drinking alcohol
Enter how much alcohol you drank and get an estimate of how much time you have to wait until you are sober again. The calculation is not scientific but based under the common assumption that the alcohol was consumed evenly during this period and that 2 cl of alcohol is digested every hour. In fact, alcohol metabolization is related to gender, liver function etc which this calculation does not consider.
Do NOT use this calculation as an absolute source to whether you can drive or operate a motorized vehicle! If you have consumed alcohol, the only safe method is to leave the car the day after. If you really want to see whether you are sober enough to drive or not, you should purchase an breathalyzer (like this cheap one or this good one) (for next time). It will give you the exact alcohol level of your blood. It is better that YOU check it than the police, right!?
This calculation uses alcohol given in volume percent. It is half the alcohol proof. I.e. 100 alcohol proof = 50% and 40 alcohol proof = 20 %.