Pearl Index Calculator

Free calculate Pearl Index. This is an educational tool only - always consult a healthcare provider.

Contraceptive Data

Results

Enter data to calculate Pearl Index

About Pearl Index

  • • Pearl Index = (Pregnancies × 1200) / Total Months
  • • Failure rate per 100 woman-years
  • • Lower = More effective
  • • Typical use vs perfect use differ
  • • Used to compare contraceptives