Blood Alcohol Calculator

Estimate Blood Alcohol Content (BAC) using the Widmark formula.

1 standard drink ≈ 14g alcohol

How to Use This Calculator

  1. Enter your Sex.
  2. Enter your Weight.
  3. Enter your Units.
  4. Enter your Standard Drinks — 1 standard drink ≈ 14g alcohol.
  5. Enter your Hours Drinking.
  6. Click Calculate to see instant results with a step-by-step breakdown.
  7. Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.

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