There is no blood alcohol calculator that is 100% accurate because of the number of factors that come into play regarding the consumption and reduction (burnoff) rates of different people. People being what they are with different metabolism rates, various health issues and the combination of medications that might be taken, drinking frequency and other such factors, the best that can be done is a rough estimation of the BAC level based on known inputs.

**Disclaimer**: This is in no way purported to be a guideline for how much you can drink and still drive or avoid being arrested! The best policy is don't drink and drive period.