Pack Years Calculator

Free calculate pack years of smoking. This is an educational tool only - always consult a healthcare provider.

Smoking History

Results

Enter smoking history to calculate pack years

About Pack Years

  • • Pack Years = (Cigarettes per Day / 20) × Years
  • • 1 pack = 20 cigarettes
  • • Used to assess lung cancer risk
  • • <10: Lower risk
  • • 10-20: Moderate risk
  • • >20: Higher risk