Ovulation Calculator

The Stork® Ovulation Calculator

When you’re trying to conceive, knowing which phase you’re in can really help you identify the best times to practice making a baby. Menstrual cycles vary from woman to woman, as does timing of ovulation. This ovulation calculator is designed to help you predict the most fertile days in your cycle.

The most fertile days are those in which you are most likely to be ovulating and therefore the most likely to successfully conceive.

Please select the first day of your last menstrual period:

Please select the first day of your last menstrual period:

Usual number of days in your cycle:

*Average length will vary by woman
**A woman’s best days to conceive can start at least one day prior and last at least one day after fertile date.