1. What is a BAC Calculator?

Definition: This calculator estimates Blood Alcohol Content (BAC) based on alcohol consumed, body weight, distribution ratio, elimination rate, and time since consumption.

Purpose: It helps individuals estimate their level of alcohol intoxication for safety and legal compliance.

2. How Does the Calculator Work?

The calculator uses the Widmark formula:

Where:

• \( BAC \) — Blood Alcohol Content (%)
• \( A \) — Alcohol consumed (grams)
• \( W \) — Body weight (grams)
• \( r \) — Distribution ratio (0.68 for men, 0.55 for women)
• \( \beta \) — Elimination rate (%/hour, typically 0.015)
• \( t \) — Time since consumption (hours)

Explanation: The formula calculates the alcohol concentration in the blood and subtracts the amount metabolized over time.

3. Importance of BAC Calculation

Details: Understanding your BAC helps prevent drunk driving, alcohol poisoning, and helps make informed decisions about alcohol consumption.

4. Using the Calculator

Tips: Enter the alcohol consumed in grams, body weight in grams, distribution ratio (default 0.68 for men), elimination rate (default 0.015), and time since drinking began.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert drinks to grams of alcohol?
A: Multiply ounces of alcohol by 23.36 (1 oz ≈ 23.36g). Standard drinks contain about 14g alcohol.

Q2: Why different ratios for men and women?
A: Women typically have higher body fat percentage and lower water content, affecting alcohol distribution.

Q3: Is the elimination rate constant?
A: It varies by individual (0.01-0.025%/hour), but 0.015 is average.

Q4: How accurate is this calculator?
A: It provides estimates. Actual BAC depends on metabolism, food intake, medications, and other factors.

Q5: What's the legal BAC limit for driving?
A: In most US states it's 0.08%, but lower for commercial drivers (0.04%) and zero tolerance for under 21.