Period Tool

PMS Calculator

Predict your PMS symptom window before your period.

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PMS Window Calculator

PMS Begins
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Peak Symptoms
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PMS Ends
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PMS typically starts 1-2 weeks before period and resolves 1-2 days after it begins.

What Is PMS?

Premenstrual syndrome (PMS) refers to physical and emotional symptoms in the luteal phase — 1-2 weeks before menstruation. It affects ~75% of women. Symptoms include bloating, breast tenderness, mood swings, irritability, and fatigue caused by hormonal fluctuations after ovulation.

Evidence-Based PMS Relief

  • Calcium 1000mg/day reduces PMS severity
  • Magnesium 200-400mg/day reduces bloating
  • Regular aerobic exercise during luteal phase
  • Reduce salt, caffeine and alcohol 2 weeks before period
  • 7-9 hours sleep nightly

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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