Menstrual (Period) Calendar Calculator
Predict your next menstrual periods.
This tool is for informational purposes only and does not replace medical advice. Consult a physician for decisions about your health.
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Result
29 Haziran 2026
Next period: Monday, 29 June 2026
Result in all units
Step-by-step solution
What Is a Period Calendar?
A menstrual (period) calendar estimates your next period date and fertile window based on your cycle length. It is used for cycle tracking and planning.
How is it calculated?
How Is It Calculated?
- Enter the first day of your last period and your average cycle length.
- Next period = last period + cycle length.
- Ovulation is about 14 days before the next period.
Frequently Asked Questions
Does it give accurate results for irregular cycles?
In irregular cycles the prediction may shift; an average cycle length over several months gives a more reliable result.