Ovulation Calculator

Knowing the days you are most likely to be fertile or ovulation date can increase your chance of getting pregnant. The typical menstrual cycle is 28 days long, but each woman is different. There are about 6 days during each menstrual cycle when you can get pregnant. This is called your fertile window. Use the calculator to see which days you are most likely to be fertile.

This ovulation calculator provides an estimate of your fertile window and is not a guarantee of pregnancy or of birth control. The ovulation calculator and information on this website are not medical advice. Talk to your doctor or nurse to plan for pregnancy and find birth control that works for you.

Fertile windows are different for every woman and can be different from month to month in the same woman. Learn more about your fertility if you are trying to get pregnant.

First Day of the Last Menstrual Period (LMP)

Menstrual Cycle (Period): Average Cycle is 28 (± 7) Days Long

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