Online Tools and Calculator

BAC Calculator

Rough blood alcohol estimate with the Widmark formula.

kg
drinks
hours

Result

Fill in the fields and tap Calculate to see your result.

Not medical advice. Consult a doctor.

How to use the BAC Calculator

  1. Select sex.
  2. Enter weight.
  3. Enter standard drinks.
  4. Enter hours since first drink.
  5. Tap Calculate to see the result.
  6. Tap Reset to clear the fields and try again.

Last updated: 1 November 2026

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