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Blood alcohol (BAC) estimator
A rough BAC estimate from drinks, weight and time, and when it reaches zero.
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- Works on any device
About Blood alcohol (BAC) estimator
Gives a rough blood alcohol concentration from the number of drinks, your weight, sex and the hours since you started, using the Widmark idea. The body clears alcohol at roughly 0.015 percent per hour. Results are estimates only and must never be used to decide whether you can drive.
How to use Blood alcohol (BAC) estimator
- Enter your weight and sex.
- Add the drinks you had and over what time.
- Read the estimated BAC and when it may reach zero.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
Can I use this to check if I can drive?
No. Real alcohol levels vary widely between people. The only safe choice after drinking is not to drive.
Why is the result only a rough estimate?
Real BAC depends on food, body water, medicine, health and how fast you drink. The tool uses an average formula, so it cannot know your true level.
How fast does the body clear alcohol?
The body clears alcohol at a fairly steady rate, and coffee, water or a shower do not speed it up. Time is the only thing that lowers it.
Is Blood alcohol (BAC) estimator free?
Yes. Blood alcohol (BAC) estimator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Blood alcohol (BAC) estimator on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.