Ovulation Calculator

Estimate your most fertile days and predict your ovulation date. A helpful tool for planning pregnancy and tracking your menstrual cycle.

First Day of Last Period

Average Cycle Length (Days)

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Used by individuals planning for pregnancy to identify their most fertile days or by those tracking menstrual health cycles for irregularities.

Estimates the ovulation date (typically 14 days before the next period starts) and the 5-6 day "fertile window" where conception is most likely.

Fun Fact: An egg cell (ovum) is the largest cell in the human body—large enough to be seen with the naked eye without a microscope!

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