1. What is Blood Alcohol Content?

Blood Alcohol Content (BAC) is a measure of the amount of alcohol present in a person's bloodstream. It's expressed as a percentage and is used to determine legal intoxication levels for activities like driving.

2. How Does the Calculator Work?

The calculator uses the Widmark formula:

Where:

• \( drinks \) — Number of standard drinks consumed
• \( factor \) — Alcohol distribution factor (typically 5.14 for men, 4.27 for women)
• \( weight \) — Body weight in kilograms
• \( time \) — Hours since first drink
• 0.015 — Average alcohol elimination rate per hour

Explanation: The equation estimates BAC by accounting for alcohol consumed, body weight, and time for alcohol metabolism.

3. Importance of BAC Calculation

Details: Knowing your BAC helps determine impairment level and whether it's safe to drive. Most countries have legal limits (typically 0.05%-0.08%) for driving.

4. Using the Calculator

Tips: Enter number of standard drinks, alcohol factor (default 5.14 for men), your weight in kg, and hours since first drink. All values must be valid (weight > 0).

5. Frequently Asked Questions (FAQ)

Q1: What counts as a standard drink?
A: Typically 14g pure alcohol - about 12oz beer (5%), 5oz wine (12%), or 1.5oz spirits (40%).

Q2: How accurate is this calculator?
A: It provides an estimate. Actual BAC varies based on metabolism, food intake, medication, and other factors.

Q3: What's the legal BAC limit for driving?
A: Varies by country: 0.08% in US/UK, 0.05% in most EU/AU, 0.03% in some countries, and 0.00% for commercial drivers.

Q4: How long does alcohol stay in your system?
A: Alcohol is metabolized at about 0.015% BAC per hour on average, but this varies by individual.

Q5: Can I sober up quickly with coffee or cold showers?
A: No. Only time reduces BAC. These might make you feel more alert but don't accelerate alcohol metabolism.