Blood Alcohol Calculator BAC Calculator Drunk Calc

Drunk Calc is the best way to accurately estimate your blood alcohol level online. Using its advanced algorithm, Drunk Calc can predict how drunk you are.

Learn about Drunk Calc

See why Drunk Calc is the #1 BAC Calculator

Advanced BAC Calculator

Drunk Calc uses a sophisticated algorithm to accurately estimate your blood alcohol level. Our BAC calculator takes important pieces of information such as your height, weight, biological sex, hunger level, how many drinks you've consumed, and how long you've been drinking, to predict your current blood alcohol level. No other BAC calculator has an algorithm quite as comprehensive as Drunk Calc's.

Safety First Approach

Drunk Calc's main purpose is to help reduce the number of alcohol-related fatalities on the road. One of the many ways we achieve this is by having a zero-tolerance approach to driving while drunk. Drunk Calc will never tell you, explicitly or otherwise, that it is safe for you to drive. Drunk Calc will always encourage you to find an alternative way home, whether that be a taxi, an uber, or a long walk. Learn more about the dangers of driving while drunk, as well as why you shouldn't drive even if you've only had a few drinks, on our FAQ page.

Free Blood Alcohol Calculator

Tying in to our main goal, we believe that everyone should be able to easily, accurately, and freely estimate their blood alcohol content. That's why Drunk Calc is, always has been, and always will be, free to use for everyone. If Drunk Calc can help prevent a single alcohol-related death by offering a free, accurate, easy-to-use BAC calculator, then we have done our job.

Legal Alcohol Limit

Every Country has its own legal alcohol limit for driving, and most set the limit somewhere between 0.05% and 0.08%. While we certainly believe that Drunk Calc is a fantastic BAC calculator, there's always room for error. That is why we will never compare your estimated BAC to the legal alcohol limit for driving in your Country. If you have had even one alcoholic drink, our advice will always be to refrain from driving. If you're curious about the legal alcohol limit for driving in your Country, Wikipedia has a list with every Country's legal limit.

Fast Blood Alcohol Level Estimate

Drunk Calc is fast. Lightning fast. Our mission with Drunk Calc was to create a BAC calculator that was accurate, easy-to-use, and most of all, fast. After all, what good is a BAC calculator if it's hard to use and super slow? We've crunched the numbers, and our final answer is 60 seconds. 60 seconds is how long it will take the average user to fill out their details and receive their estimated blood alcohol level. So what are you waiting for? Give the fastest blood alcohol calculator on earth a shot right now!

Drunk Calc Features

Drunk Calc receives constant improvements, and one of the ways we do this is by releasing new and exciting features all of the time. The latest and greatest feature added to Drunk Calc was the chart feature. You may notice that when you use the BAC calculator, there is a chart that appears below your results. This chart will tell you what your current BAC is, what your peak BAC is (and when you will reach it), and when your BAC will reach 0%.

Learn More About Drunk Calc

If you've still got questions, we've got answers. Learn all about Drunk Calc and BAC calculators on one of our great info pages:

If you've ever wondered why, wonder no more. Get all of your what questions answered here. Or maybe you'd like to know how. Perhaps you have some frequently asked questions that need answering?

We've also got some great resources for alcohol and drug addiction. If you want to contact us, that's where you can do it. And if you feel like reading our terms and conditions, be our guest.

Step 1: Personal Details

Enter your biological sex, weight, and height

Biological Sex

Change to lbs
Change to kg
Change to ft & in
Change to cm

Step 2: Drink Details

Enter the drinks you have consumed

Drink Type

Change to fl oz
Change to mL

Cocktail Choice

Hunger Level

Drinks Consumed
Clear all drinks

Step 3: Your Results

Your estimated BAC is displayed below

BAC Table
Current BAC
Peak BAC
Time Till Peak
Time Till Zero
Test It Yourself

For your own safety and for the safety of everyone else on the road, please don't drink and drive. We recommend walking, using public transport, or getting an Uber instead.

BAC Chart
Plan Ahead

More than 10,000 people in the United States will die this year as a result of drunk driving. It's not worth it. Please don't drink and drive.