Menstrual Cycle Calculator
A free online tool to predict your menstrual cycle, ovulation, and fertile windows, helping women plan and monitor their reproductive health accurately.
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About This Tool
How to Use
- Select the date of your last period using the date picker.
- Enter your average cycle length in days.
- Optionally, specify cycle variability (if your cycles are irregular).
- Click 'Calculate' to view predicted period, ovulation, and fertility window.
Frequently Asked Questions
Find Quick Answers
How accurate is the cycle prediction?
Can I use this tool if my cycles are irregular?
Is this tool suitable for medical diagnosis?
Can I use different date formats?
Is my data stored or shared?
Need to run multiple calculations?
Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.
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