Ovulation Calculator

Menstrual periods are different from woman to woman and month to month. Use this calculator to see when you may be ovulating to help find your most fertile days.
FERTILE WINDOW
APPROXIMATE OVULATION
NEXT PERIOD
PREGNANCY TEST DAY
This tool cannot and should not be used to prevent pregnancy.
Results are estimates and actual ovulation will vary for each woman.
For more information, visit the WebMD Ovulation Calculator.