Ovulation Date Calculator

The ovulation date calculator below can help you determine which days of the month you are most fertile.

You should follow these steps in order to use our calculator:

  • Introduce the date of the first day of your last menstruation in the corresponding box following the format day/month/year, for instance: 01/04/2009.
  • For more accuracy, fill in the boxes “Penultimate and antepenultimate menstruation”, if you know this information.
  • Select the length of your menstruation cycle; if you are not sure, please select “28 days”.
  • Press the bottom “Calculate Ovulation Date
Last menstruation date:
Penultimate menstruation date:
Antepenultimate menstruation date:
Lenght of the menstruation cycle:

Next ovulation

Fertil Day
Fertil Day
Fertil Day
Fertil Day

WARNING: This calendar can not and should not be used to prevent pregnancy.

The results provided by this programme it only has orientative value, therefore, Instituto Bernabeu, is exonerated from any kind of responsibility foany third party liability derivated from its use.

More information at the following link:

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