📅 Ovulation Calculator
Predict your ovulation date and fertile window based on your menstrual cycle.
⚠️ This calculator is for informational purposes only. Consult a healthcare provider for family planning advice.
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Ovulation Date
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Fertile Window Start
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Fertile Window End
Period
Fertile Window
Ovulation Day
Other Days
Ovulation Calculator
Predict your ovulation date and fertile window based on your cycle length. Visual calendar shows your period, fertile days, and ovulation day.
Frequently Asked Questions
How does this work?
Ovulation typically occurs 14 days before your next period. The fertile window is the 5 days before ovulation plus the day of ovulation.
How accurate is this?
This calculator uses average cycle data. Actual ovulation varies. Use this as a guide, not a guarantee.
What is the fertile window?
The fertile window is typically 6 days: the 5 days before ovulation and the day of ovulation. Sperm can survive up to 5 days in the reproductive tract.