Ovulation calculator

Menstrual cycle is different from woman to woman and month to month. You can use this calculator to estimate your most fertile days.

February, 2023
Low chance of getting pregnant
Period
Approximate day of ovulation
Higher chance of getting pregnant
  • 30
  • 31
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 1
  • 2
  • 3
  • 4
  • 5

The calculator is based on Rhythm method (Knaus–Ogino method), is valid for regular menstrual cycles and shall not be used as contraceptive method.