Ovulation Calculator
Estimate your ovulation date and fertile window based on your menstrual cycle. Enter First Day of Last Period and Average Cycle Length (days) to get Estimated Ovulation D
Parameters
Enter the required details below
Ready to Calculate
Enter your parameters and click calculate to see the results here.
How to Use
- Enter First Day of Last Period.
- Enter Average Cycle Length (days).
- Click Calculate to see Estimated Ovulation Date, Fertile Window Start, Fertile Window End and Next Period Date.
- Check the result. Use Reset if you want to try different numbers.
About This Calculator
Estimate your ovulation date and fertile window based on your menstrual cycle. This tool is in the Health & Fitness collection on Qalculators. Enter First Day of Last Period and Average Cycle Length (days) to calculate Estimated Ovulation Date, Fertile Window Start, Fertile Window End and Next Period Date. Results stay in your browser unless you copy them.
Frequently asked questions
What does Ovulation Calculator calculate?+
Estimate your ovulation date and fertile window based on your menstrual cycle. You enter First Day of Last Period and Average Cycle Length (days) and receive Estimated Ovulation Date, Fertile Window Start, Fertile Window End and Next Period Date.
What information do I need for Ovulation Calculator?+
You need First Day of Last Period and Average Cycle Length (days). Optional fields can stay at their defaults.
Is Ovulation Calculator free to use?+
Yes. Ovulation Calculator is free and does not require an account. The calculation runs in your browser.
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