Menstrual Cycle Calculator

Menstrual Cycle Calculator

Track your cycle, estimate ovulation, and understand your fertile window.

First Day of Your Last Period:


Average Cycle Length (21–45 days):

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Important Information

• This calculator provides estimates based on average cycle patterns.
• Results may not be accurate for irregular cycles.
• Ovulation is estimated as occurring 14 days before the next expected period.
• For pregnancy planning or medical concerns, consult a qualified healthcare professional.

Medical Disclaimer: This tool is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always seek guidance from a licensed healthcare provider regarding your reproductive health.