Blood Alcohol Content (BAC) Calculator

Estimate your Blood Alcohol Content (BAC) based on the Widmark formula to ensure safety and compliance with legal limits.

Select Gender

BAC Comparison

The Blood Alcohol Content (BAC) Calculator uses the Widmark formula to estimate your BAC based on weight, gender, amount of alcohol consumed, and time elapsed since drinking. This tool helps you assess your level of intoxication and understand its potential effects on your body and behavior.

Formula

  • BAC = (Alcohol Consumed in grams / (Body Weight × Gender Constant × 1000)) × 100 − (Time Elapsed in hours × 0.015).
  • Gender Constants: 0.68 for males, 0.55 for females.
  • Example: A 70 kg male consuming 50 grams of alcohol over 1 hour has a BAC of approximately 0.048%.

Why Use the BAC Calculator?

  • Estimate your level of intoxication and potential impairment.
  • Ensure you stay within the legal alcohol limit for driving or operating machinery.
  • Understand how alcohol consumption affects your body to make responsible decisions.

Limitations

  • Provides an estimate and does not account for variations in metabolism, tolerance, or health conditions.
  • Not a substitute for breathalyzer or blood tests for legal or medical purposes.
  • Consult healthcare providers or legal authorities for accurate assessments.

Frequently Asked Questions

What is Blood Alcohol Content (BAC)?

BAC measures the amount of alcohol in your blood as a percentage. For instance, a BAC of 0.08% means 0.08 grams of alcohol per 100 milliliters of blood.

What is the legal BAC limit for driving?

In most countries, the legal limit is 0.08%, but some have stricter limits, like 0.05%, or zero-tolerance policies for young drivers or specific professions.

How accurate is this BAC Calculator?

The calculator uses the Widmark formula for reliable estimates. However, factors like metabolism, medication, and health may affect actual BAC. Use a breathalyzer or blood test for precise results.

How does gender influence BAC?

Women generally have less body water than men, leading to higher BAC levels for the same amount of alcohol consumed.

Does eating affect BAC?

Yes, eating before or while drinking slows alcohol absorption, reducing the speed and level of BAC increase compared to drinking on an empty stomach.

How long does it take to sober up?

The body processes alcohol at an average rate of 0.015% BAC per hour. Factors like weight, health, and gender can affect this rate. Time is the only reliable way to sober up.