Ovulation Date Calculator

Predict your ovulation date with the ovulation date calculator based on the Ogino method.
Type in the length of your cycle and the start date of your last menstruation and press Calculate.

 

Average Cycle Length :
Previous menstruation start date :
/ / (mm/dd/yyyy)
Display days for pregnancy tests
Display predicted birth due dates

Fertile Days
To
Estimated ovulation date
To
Predicted date of next menstruation
Days for Pregnancy Tests
After
Predicted birth due date
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Email2
※Use this form for sending to your partner.
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The e-mail address you input here will only be used to send the results of the calculation.
We will never send you promotions or spam e-mail.

Please use this form if there is an error or to share your opinions or suggestions with us.

* Notes

The results of this calculation are an estimated value based on Ogino theory. We do not guarantee the result of the calculation.

The dates for pregnancy tests are the days when pregnancy test drugs work in general (one week after period due date).

* Limits on receiving e-mails

When using the ovulation date calculator e-mail service and if you are limiting the senders from whom you can receive emails then please remove limitations for the following e-mail domain:

Calculator results will be sent from 「 @kisodiary.com 」

Calculator results will be sent from "hairan@kisodiary.com".