Ovulation Calculator

Calculate your ovulation date and fertile window based on your menstrual cycle.

Calculate Ovulation
Enter your menstrual cycle information

Select the first day of your most recent menstrual period

The average length of your menstrual cycle (typically 28 days). This is the number of days from the first day of one period to the first day of the next.

The luteal phase is the time between ovulation and the start of your period (typically 14 days). Leave at 14 if you're unsure.

Your Results
Your calculated ovulation and fertile window

No Results Yet

Fill out the form and click "Calculate Ovulation" to see your results here.