Menstrual Period Calculator
Predict your next three menstrual periods based on your cycle length.
Enter your details
Your results
Next period starts
July 3, 2026
- Next period window
- July 3, 2026 - July 7, 2026
- Period after that
- July 31, 2026
- Third upcoming period
- August 28, 2026
Tracking Your Cycle
A normal menstrual cycle is 21-35 days. Tracking your cycle helps identify irregularities, plan around hormonal symptoms, and time conception or contraception.
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Frequently Asked Questions
Is it normal to have an irregular cycle?
Occasional irregularity is common, especially around stress, illness, or weight changes. Frequent irregularity warrants a check-up.