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Ovulation Calculator

Calculates the ovulation period, the days most likely to get pregnant, and the estimated due date if pregnant based on the first day of your last period and the average length of your menstrual cycle.

Calculator

Select and input the first day of your last period, and select your length of cycles, then click "Calculate" to see your ovulation calendar.
First Day of Your Last Period:
mm/dd/yyyy
Average Length of Cycles:

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Related Information

Sperm can live for 3-6 days, but the egg can only live for 12-24 hours. So choosing an appropriate time to have intercourse is important for conceiving. Generally speaking, it is most likely to succeed that you have sex one or two days before ovulation and again on the day you ovulate.


More Information: More about Ovulation