Period Tool

Menstrual Cycle Calculator

Calculate your menstrual cycle length and understand what it means.

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Menstrual Cycle Calculator

Cycle Length
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Status
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Next Period
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Your Menstrual Cycle Has 4 Phases

  • Menstruation (Days 1-5): Uterine lining sheds. Hormones at lowest.
  • Follicular Phase (Days 1-13): Estrogen rises, follicles develop, energy increases.
  • Ovulation (Day 14 in 28-day cycle): LH surge triggers egg release.
  • Luteal Phase (Days 15-28): Progesterone rises. If no pregnancy, both drop causing menstruation.

Medical Disclaimer: This tool is for educational purposes only and should not replace professional medical advice. Always consult a qualified healthcare provider.

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