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Ovulation Calculator

Trying to conceive? Planning the month? This web tool will help a predict a healthy woman's menstrual cycle and ovulation dates. So if you are looking for a visit from the stork, or wanting to keep him away, try this!

(Please note: This is intended only as a reference and is not to replace advice from qualified medical staff, nor should it solely be used for contraception. ). But it will be pretty darn close. There is also a Pregnancy Planning e-tool on the results page for helping to choose the sex during conception. Please read our disclaimer.

Ovulation Calculator

For best results enter in the dates of the first day of your last three menstrual periods. If you can not remember these three dates, then enter in the first day of your last menstrual period.
The beginning of last menstrual period:

Based on the average menstrual cycle of 28 days, your preceding menstrual period was on: (if this is incorrect, and you know the date feel free to change the date calculated below)
Menstrual period before the above:

For even more accurate calculation a preceding date is needed: (if this is incorrect, and you know the date feel free to change the date calculated below)

Preceding menstrual period:
(approximately 3 months ago)

Your menstrual cycle is approximately: days long
Date of next period should be:
Fertility information:

high fertility
Begin
significant
fertility

ovulation
End
significant
fertility


CAUTION: This calendar cannot and should not be used to prevent pregnancy. For cycles shorter than 21 days and greater than 35 days there is a higher likelihood that you may not be ovulating.

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