Ovulation Calculator

How does the ovulation calculator work?

Most women ovulate about two weeks before the first day of their period. Our calculator works out when your cycle will end, and counts back two weeks to estimate when you may ovulate. You will be fertile in the days leading up to ovulation, as well as the day itself, so the ovulation calculator will show your entire fertile window. This is the best time of the month for you to have intercourse if you’re trying for a baby. You will also get to know your upcoming fertile days, and when your baby will be due if you do conceive. So you’ll have all the information you need to start planning your pregnancy.