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Free online Ovulation Calculator

Use the Ovulation Calculator to find out when your ovulation date is, and increase the likelihood of getting pregnant. The Ovulation Calculator shows your fertile days - keep in mind that you are most fertile on your ovulation date.

Ovulation Calculator

When was the first day of your last menstrual period?

   
Number of days in your menstrual cycle
Your ovulation date (mm/dd/yyyy) is:
Your fertile days are:
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How to use the Ovulation Calculator

On average, there are 28 days in a menstrual cycle - it can last from as little as 22 to as many as 44 days. The Ovulation Calculator gives you the approximate ovulation date, but if your cycle is irregular the results may be less accurate.

Did you find the Ovulation Calculator useful?
See other calculators: Due date calculator and Pregnancy calculator
Contraction Timer See WW Points calculator: WW Points Calculator