๐ Health & Fitness
Blood Alcohol Calculator
This uses the Widmark formula, the standard estimate used in forensic toxicology. It assumes an average elimination rate of 0.015 percentage points per hour and is a rough guide only โ food, medication, hydration and genetics all change the real figure.
How it works
Sex
Body weight
Standard drinks (14 g each)
Hours since first drink
Estimated BAC
Alcohol consumed
Hours to reach zero
Frequently asked questions
How do I use the Blood Alcohol Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.