BAC Calculator
Estimate Blood Alcohol Content (BAC) using Widmark's formula. For educational purposes only.
What is BAC?
BAC is the percent of alcohol in your blood. Legal driving limits are typically 0.05% or 0.08%.
How is it calculated?
BAC% = (grams alcohol) / (body water grams × r) × 100 − 0.015 × hours.
Frequently Asked Questions
- Is this safe to use to decide if I can drive?
- No. Never use BAC estimates to decide if you can drive. Many factors are not modeled.