Ovulation Calculator
Track your fertile window and ovulation date
Enter Details
Enter your cycle details
Calculate your fertile window and ovulation date
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References
- World Health Organization (WHO) - BMI Classification
- National Institutes of Health (NIH) - Clinical Guidelines
- Centers for Disease Control and Prevention (CDC) - Healthy Weight
About Ovulation Calculator
How It Works
Ovulation typically occurs 14 days before your next expected period. For a 28-day cycle, ovulation occurs around day 14. The fertile window spans approximately 6 days, ending on ovulation day.
How to Interpret Results
The calculator identifies your estimated ovulation day and fertile window. The highest probability of conception occurs when intercourse happens in the 2-3 days leading up to ovulation.
Health Tips
Track additional fertility signs like basal body temperature and cervical mucus for more accurate ovulation detection. Use ovulation predictor kits to confirm timing. Maintain a healthy weight for optimal fertility.
Limitations
Cycle lengths vary between individuals and from month to month. Stress, illness, and hormonal conditions like PCOS can disrupt ovulation timing. Estimates are least accurate for irregular cycles.
Last reviewed: July 16, 2026
Medical Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or qualified health provider with any questions regarding your health.