Calculate your Blood Alcohol Content instantly with our free, accurate BAC calculator. Check legal limits, sobriety time, and learn about alcohol metabolism.
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1 standard drink ≈ 14g pure alcohol (12oz beer 5%, 5oz wine 12%, 1.5oz spirits 40%). Results are estimates, not medical advice. Learn standard drink sizes.
Explore our BAC Learning Center with 20+ expert articles on alcohol safety and metabolism.
Related tools: BAC Chart by Weight | Legal BAC Limits | Time Until Sober
Want comprehensive alcohol education? Use our BAC calculator tool and visit our Learning Center with 20+ expert articles on blood alcohol content and safe drinking practices.
A blood alcohol calculator estimates your BAC using weight, gender, drinks and time. Our BAC calculator tool provides instant, accurate estimations to help you understand your blood alcohol content. It is for education—not a legal measurement.
Use our BAC calculator tool to determine where you fall on the BAC continuum and understand the effects of different blood alcohol content levels.
How you feel:
Relaxed; More confident; Slight euphoria; Feeling tipsy
How you look:
Relaxed; More talkative; Happy
Learn more about what BAC means and how it affects your body at different levels. Use our BAC calculator to estimate where you might fall on the BAC continuum.
How you feel:
In control; Unstoppable; "Buzzed"; More emotional; The room is spinning; Groggy, nauseous
How you look:
Uncoordinated; Drunk; Out of it; Over-confident; Angry, irrational, jumpy; Sick; Sleepy, can't keep your head up; Slurring your speech
Discover the health risks at different BAC levels and why impairment begins earlier than most people realize. Use our BAC calculator to understand how different factors affect your blood alcohol content.
How you feel:
Lost; Confused; Disoriented; Sick; Dizzy; Exhausted; Angry
How you look:
Uncontrollable; Unintelligible; Unaware; "Wasted," "Gone"; Can't stand up, can't walk; Uncooperative; Loss of bladder control; Cold skin; Unresponsive; Puking; Slow breathing
Understand the warning signs of alcohol poisoning and when to seek emergency medical help. Our BAC calculator can help you recognize dangerous levels of blood alcohol content before they become life-threatening.
Want to learn more about how alcohol affects your body? Use our BAC calculator tool to understand your blood alcohol content levels. Explore our comprehensive BAC learning center with 20+ expert articles.
Simple steps to calculate your estimated Blood Alcohol Content safely and accurately with our BAC calculator. Learn how to use this essential tool for responsible drinking.
Enter your weight, select gender and units (kg/lb) Our BAC calculator tool makes this process simple and accurate.
Choose drink types (beer, wine, liquor) and specify amounts with ABV Our BAC calculator tool makes this process simple and accurate.
Add hours spent drinking to calculate current BAC Our BAC calculator tool makes this process simple and accurate.
Review estimated BAC, legal limits and time to reach 0.00 Our BAC calculator tool makes this process simple and accurate.
Use results for educational purposes and safer decision making Our BAC calculator tool makes this process simple and accurate.
Built for clarity, privacy, and safety education. Our BAC calculator offers accurate estimations and comprehensive safety features to help you make informed decisions. This BAC calculator tool is designed to be the most user-friendly and reliable blood alcohol content estimation tool available online.
Uses the Widmark formula with gender factor and metabolism rate for realistic BAC estimates. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
Calculate BAC for beer, wine, liquor, and other drinks with custom ABV and serving sizes. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
Responsive design adapts to phones, tablets, and desktops for on-the-go checks. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
All calculations happen locally in your browser. We never store or send your inputs. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
Shows an estimate of how long it could take to reach 0.00 BAC. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
Learn factors that affect BAC, safe drinking guidelines, and legal considerations. Our BAC calculator tool incorporates all these features to provide the best blood alcohol content estimation.
Use our BAC calculator tool alongside these resources to better understand your blood alcohol content and make informed decisions about drinking.
See BAC levels for different weights and drink amounts
Know the legal limits in your state and country
Calculate alcohol elimination time and sobriety
Want in-depth alcohol education? Explore our comprehensive learning center:
Visit BAC Learning CenterReliable estimates, simple interface, and SEO-optimized learning resources. Our BAC calculator is the most trusted tool for understanding your blood alcohol content and making safe decisions. This BAC calculator provides the most accurate estimations available online for blood alcohol content.
Make safer decisions before you drive or operate machinery Our BAC calculator tool makes it easy to access all these benefits with just a few clicks.
Understand how weight, gender, and time affect your BAC Our BAC calculator tool makes it easy to access all these benefits with just a few clicks.
Plan nights out with awareness of legal BAC limits Our BAC calculator tool makes it easy to access all these benefits with just a few clicks.
Use on any device without registration or downloads Our BAC calculator tool makes it easy to access all these benefits with just a few clicks.
Share learning articles with friends and family to promote safety Our BAC calculator tool makes it easy to access all these benefits with just a few clicks.
Access 20+ expert articles on alcohol education in our Learning Center. Combine this knowledge with our BAC calculator tool for a complete understanding of alcohol effects.
Learn about factors affecting BAC, gender differences, and safe drinking practices
Want comprehensive alcohol education?
Explore Learning CenterFor drivers, students, event planners, and health-conscious individuals. Anyone who wants to understand their blood alcohol content should use our BAC calculator for safer decision-making. This BAC calculator tool is essential for anyone who wants to make informed decisions about alcohol consumption.
Drivers checking if they should avoid driving after drinking Use our BAC calculator tool to make informed decisions in all these situations.
Event planners estimating responsible alcohol service Use our BAC calculator tool to make informed decisions in all these situations.
Students learning the science of alcohol metabolism Use our BAC calculator tool to make informed decisions in all these situations.
HR and compliance teams educating employees about alcohol policies Use our BAC calculator tool to make informed decisions in all these situations.
Travelers comparing international legal BAC limits Use our BAC calculator tool to make informed decisions in all these situations.
Anyone curious about "how long until sober" estimates Use our BAC calculator tool to make informed decisions in all these situations.
Answers to common questions about BAC estimation and safety. Learn how to use our BAC calculator effectively with these frequently asked questions. This BAC calculator tool is designed to be the most comprehensive and user-friendly blood alcohol content estimation tool available.
A BAC calculator estimates your Blood Alcohol Content based on inputs like weight, gender, number of standard drinks and time. It provides an educational estimate, not a legal measurement. Our BAC calculator tool addresses all these common questions with accurate estimations.
It uses the Widmark formula and typical metabolism rates. Individual physiology, medications, and food intake can cause significant variation. For legal or safety-critical purposes, use a certified test. Our BAC calculator tool addresses all these common questions with accurate estimations.
No. All calculations run in your browser and are not uploaded or stored on our servers. Our BAC calculator tool addresses all these common questions with accurate estimations.
In the U.S., one standard drink contains about 14g of pure alcohol: 12oz beer (5%), 5oz wine (12%), or 1.5oz spirits (40%). Our BAC calculator tool addresses all these common questions with accurate estimations.
In most U.S. states, the per se limit for non-commercial adult drivers is 0.08 BAC; many countries have different limits. Younger drivers and commercial drivers often have lower limits. Our BAC calculator tool addresses all these common questions with accurate estimations.
A typical elimination rate is about 0.015 BAC per hour, but this varies. Our tool shows an estimate of time to reach 0.00 BAC. Our BAC calculator tool addresses all these common questions with accurate estimations.
Biological sex significantly affects BAC due to differences in body water percentage, enzyme activity, and hormonal influences. Women typically have higher BAC levels than men of the same weight after consuming the same amount of alcohol.
Our BAC calculator tool provides instant, accurate estimations of your blood alcohol content based on scientific formulas. It helps you make informed decisions about driving, drinking responsibly, and understanding how alcohol affects your body. The BAC calculator is easy to use, privacy-focused, and available on all devices.
Over 25 personal and situational factors affect BAC levels, including body weight, body fat percentage, gender, age, food consumption, drink strength, consumption rate, medications, and health conditions. Our BAC calculator tool takes many of these factors into account to provide accurate estimations.
Safe drinking involves planning transportation, setting personal drink limits, eating before drinking, pacing yourself, and understanding standard drink sizes to avoid unintentional overconsumption. Use our BAC calculator tool to monitor your estimated blood alcohol content and stay within safe limits.
Still have questions? Use our BAC calculator tool and explore our Learn section to better understand blood alcohol content and safe drinking practices. Our BAC calculator is the best resource for estimating your blood alcohol content and making informed decisions about drinking.