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Ovulation Calendar


  • This calendar does not give you any idea about safe period for unprotected sex. There is no definitive way to tell if any time is safe for unprotected sex.
  • This calendar is not universal and should not be taken as completely accurate. Menstrual cycle is different in every woman and this calendar may not match your menstrual pattern.
  • Women who have a 28 to 32 day menstrual cycle, may ovulate between 11th day and 21st day of the cycle. This is just an average, because different women have different cycle patterns.
  • This website or Aponjon is not liable for any interpretation based on the calculation done in this calculator. This calculator is a guide at best. Please consult with your physician to get accurate information and guidance.

Please give input of the information sought below:

Note: this is the date when your last menstruation started. Type in the date in DD-MM-YYYY format or pick a date from the calendar icon.

Note: this is the length from first day of one period to the first day of the next period. This can vary from one woman to another. If unsure of your period length, leave it at 28.

: First day of your last menstrual period (the day your bleeding started)

: The probable days of your ovulation; these are the most fertile period. You are more likely to conceive during these days.