Free BAC Calculator Time to Sober Up
Calculate your Blood Alcohol Concentration (BAC) and
the estimated time it takes to sober up automatically.
Estimated BAC
Time to Sober Up
*This result is an estimate. Do not drink and drive.
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About BAC Calculator
The "BAC Calculator" is a tool that estimates the time it takes for alcohol to completely leave your body, based on the type and volume of drinks, your weight, and gender. It also calculates your Blood Alcohol Concentration (BAC) using the Widmark formula.
This is useful as a guideline for when it might be safe to drive the morning after a party. All calculations are performed entirely on your browser, meaning your input data is never saved on any server.
How to Use
Basic Information
Enter your "Gender" and "Weight". These factors significantly affect the alcohol breakdown speed.
Alcohol Amount
Select the type of drink (e.g., Beer, Wine) and enter its volume (ml). You can add multiple types of drinks.
Check Results
Press the "Calculate" button to view your estimated BAC and the time it will take to sober up.
Alcohol Glossary
- BAC (Blood Alcohol Concentration)
- The percentage of alcohol in the bloodstream. A higher number indicates a stronger level of intoxication.
- Pure Alcohol Volume
- The actual grams of alcohol contained in a drink. Calculated as: Volume (ml) × ABV (%) × 0.8 (specific gravity).
- Widmark Formula
- A formula developed by Dr. Erik Widmark to estimate BAC based on weight and amount of alcohol consumed. It is widely used internationally.
- Alcohol Breakdown Rate
- The amount of alcohol the liver can metabolize per hour. Generally, "Weight (kg) × 0.1g" is considered a standard estimate for hourly breakdown.
- DUI (Driving Under the Influence)
- Operating a vehicle with a blood alcohol concentration above the legal limit. This is strictly penalized by law in most countries.
FAQ
- Q.Will I definitely be able to drive after the calculated time?
- No. This calculation is only an average estimate. The breakdown speed varies greatly depending on individual constitution, physical condition, meals, etc. Do not drive if you have any concerns.
- Q.Is the weight and drinking data I enter sent to a server?
- No. All calculations are performed on your browser (local environment). Rest assured that your input data is never sent to or saved on our servers.
- Q.Does sleeping after drinking make the alcohol break down faster?
- During sleep, the function of internal organs slows down, so it is said that the breakdown speed of alcohol is actually slower than when awake.
- Q.Why does it take longer for women to break down alcohol?
- Generally, women have less body water and more body fat compared to men, so their blood alcohol concentration tends to be higher and takes longer to break down.
- Q.Is alcohol still left in my system when I have a hangover?
- Yes, it is highly likely. Also, even if the alcohol is gone, driving while experiencing hangover symptoms like headache or nausea is extremely dangerous.
Use Cases
Driving Guidelines
If you plan to drive the morning after a party, you can calculate an estimate of when the alcohol will clear to plan your schedule safely.
Preventing Overdrinking
By tracking your alcohol intake, you can objectively understand your BAC level and prevent yourself from drinking too much.
Health Management
Use the tool to grasp the burden your daily alcohol intake places on your liver, and set goals for alcohol-free days.
Event Awareness
Organizers can use this tool to educate event participants on safe drinking limits and expected sober-up times to encourage responsibility.
Send Feedback
Please let us know your thoughts to help us improve the tool.
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