Ovulation Calculator

Ovulation Calculator
When did your last period start?
E.g. 18/01/2020
Usually, how long is your cycle?
Cycles typically vary from 23 to 35 days
Estimate your ovulation day
likelihood of ovulating today
Due to your cycle length, unfortunately we can't estimate an ovulation probability. We recommend that you use a Digital Ovulation Test to accurately detect your most fertile days.
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Start of your last period
  20%
Likelihood of ovulating on this date
Change my informations
In partnership with Clearblue®.
Results are based on the information you have provided and data from the publication below: Sarah Johnson, Lorrae Marriott & Michael Zinaman (2018): “Can apps and calendar methods predict ovulation with accuracy?”, Current Medical Research and Opinion, DOI:10.1080/03007995.2018.1475348

We make every effort in the development of our calculator tools, but we cannot be held liable for the loss or monetary losses that may arise out of or in conjunction with using these products in any manner. Disclaimer in its entirety. These tools are provided solely as a convenience to you; therefore, you should use them at your own discretion and risk of injury.

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