Ovulation Calculator

Track your menstrual cycle and predict your most fertile days

Cycle Information

Last Period Start Date

Average Cycle Length

Period Length

Luteal Phase Length

Future Cycles to Show

Note: This calculator provides estimates based on average cycle patterns.

For more accurate tracking, monitor your basal body temperature and cervical mucus.

Consult a healthcare provider for personalized fertility advice.

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Enter your last period date to calculate your fertility window and ovulation date