What is a BAC calculator?

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.

Is the BAC estimate accurate?

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.

Do you store my data?

No. All calculations run in your browser and are not uploaded or stored on our servers.

What is a standard drink?

In the U.S., one standard drink contains about 14g of pure alcohol: 12oz beer (5%), 5oz wine (12%), or 1.5oz spirits (40%).

What is the legal BAC limit?

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.

How long until I am sober?

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.

guides

Found 5 articles about “guides”

Best Apps for Tracking Your BAC: A Comprehensive Review

An in-depth review of the best apps for tracking BAC. We analyze features, accuracy, privacy, and how they fit into a responsible drinking strategy.

BAC Calculator Team7 min readAug 9

Tools

Apps

Guides

Home Breathalyzer Reviews and Recommendations

Key features to consider when buying a personal breathalyzer and how to use it responsibly.

BAC Calculator Team6 min readAug 9

Tools

Breathalyzer

Guides

How Long Does Alcohol Stay in Your System? A Comprehensive Guide

A detailed guide to alcohol detection windows in breath, blood, urine, and saliva, the factors affecting metabolism, and the science behind sobering up.

BAC Calculator Team6 min readAug 9

Guides

Metabolism

Safety

Safe Drinking Guidelines: A Comprehensive Guide to Knowing Your Limits

A detailed, evidence-informed guide to making safer choices when drinking alcohol, covering planning, pacing, and prevention strategies.

BAC Calculator Team5 min readAug 9

Guides

Safety

Health

Standard Drink Sizes: Ultimate Visual Measurement Guide 2025

Complete visual guide to standard drinks vs reality - beer, wine, spirits comparison with actual serving sizes, craft variations, common misconceptions, and precise alcohol content calculations.

BAC Calculator Team9 min readAug 9

Measurement

Guides

Visual