Ovulation Calendar

From first day of your period to the first day of your next period. Ranges from: 22 to 44. Default = 28 Optional: Leave 28 if unsure.

Do you know your days of ovulation?

Use our free ovulation calendar below as a guide to help you track your ovulation. Some people also refer to this as an ovulation calculator.

If you are trying to get pregnant, you should get a copy of the Essential Guide to Getting Pregnant. Also check out our Fertility Shop.

When are you most fertile?

Our calculator can help you discover the most fertile days of your menstrual cycle or your “Estimated Fertility Window” based on information you provide.

Find out a date for your next period and when you could possibly receive a positive pregnancy test.

How long do you ovulate?

For women who have a 28 to 32-day menstrual cycles, ovulation can take place between days 11 through 21. Remember this is just an average of days that ovulation could take place—every woman’s cycle is different.