Ovulation calculator

Women’s menstrual cycles are different, and women should get to know their body better. This is where our ovulation calculator can help you discover your unique cycle! Estimate your most fertile days for better control of your sex life.

Determine your most fertile days

You’re most likely to get pregnant fall in your fertile window. These windows can differ for every woman, but on average there’s about a 6-day span during each menstrual cycle when conception is possible and chances of getting pregnant increase significantly – this includes ovulation day! Estimate your window with the calculator below.

Determine your most fertile days

* Calculator provides an estimate of your fertile window and is not a guarantee of pregnancy or of birth control. The calculator and information on this website are not medical advice. Talk to your doctor or nurse to plan for pregnancy and find birth control that works for you.

The first day of your last period

Average cycle length



Fertile Window
Ovulation Date

Your estimated ovulation date is :

You are most likely to get pregnant if you have sex without birth control a few days before your ovulation date

Save to my calendar
Close Bitnami banner