Conception date calculator

When was or can your baby be conceived? Enter the date of the first day of your last menstrual period (LMP), and in the table below you will see the probable dates of conception based upon the average length of your menstrual cycle. Note: Your browser must be Java-enabled for the calculator to work.

Fill in your LMP date below
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Month:

Date:

Year:

Conception date - 25 day cycle:
Conception date - 26 day cycle:
Conception date - 27 day cycle:
Conception date - 28 day cycle:
Conception date - 29 day cycle:
Conception date - 30 day cycle:
Conception date - 31 day cycle:
Conception date - 32 day cycle:
Conception date - 33 day cycle:
Conception date - 34 day cycle:
Conception date - 35 day cycle:
Conception date - 36 day cycle:
Conception date - 37 day cycle:
Conception date - 38 day cycle:

CAUTION: This calculator cannot and should not be used to prevent pregnancy (Why? Read here.). For cycles shorter than 21 days and greater than 35 days there is a higher likelihood that you may not be ovulating. However, whether or not you are indeed ovulating as well as the most probable ovulation date itself can only be determined after a thorough gynecological examination.

Gynecology Infertility