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I think I am pregnant. How far along am I?

We date pregnancies from the first day of the previous menstrual cycle. Actual conception usually occurs around two weeks after that day. Sometimes, it is difficult to remember the last menstrual period, or the last period may have been atypical which calls into question the true gestational age. We do ultrasounds to confirm dates whenever there is any question.

Use the following calculator to estimate* your due date:

  1. First, open the calendar by clicking here. (The calculator requires that popups be enabled for this page.)
  2. Next, select the date of your last menstrual period.
  3. Your approximate due date will be listed below.
Your approximate due date is:                  

* Your due date is calculated by determining the first day of your last menstrual period. Substract 3 months from that date. Then add 7 days plus 1 year.

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