BAC Calculator
Estimate blood alcohol concentration (BAC) from drinks consumed, body weight, and time.
Inputs explained
- Number of Drinks — Standard drinks consumed. Example: 3.
- Weight (lbs) — Your body weight in pounds.
- Gender — Male or Female — affects alcohol distribution.
- Hours Since First Drink — How long ago you started drinking, which lowers BAC over time.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: 3 drinks for a 160-lb man over 2 hours gives a BAC of roughly 0.04% (estimate only).
Frequently asked questions
Is the BAC Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Number of Drinks, Weight (lbs), Gender, Hours Since First Drink. Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the BAC Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.