Ovulation Calculator


When do you ovulate? How do you know when you are ovulating? Use this free ovulation calculator (you can think of it also as a fertility calculator) to generate an ovulation calendar showing when you will ovulate next and your most fertile days for the next 7 cycles. In addition, you will find out the due date for each cycle if you are to get pregnant during your fertile days.

To use this tool, simply enter the first day of your last period and the number of days in your cycle below, and click on the Find button. First, remember to bookmark this site by pressing Control-D so you can return to this page at any time.



Ovulation Calculator

First day of your last menstrual period:



Cycle length:











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