Pregnancy Due Date Calculator
Use the Due Date Calculator to determine the likely due date of your baby. Keep in mind that only 6% of babies are actually born on their due date. The Due Date Calculator shows the likely conception date, the end of the first and the second trimester dates - and of course the due date.
How your due date is calculated:
Your due date is estimated by adding 40 weeks (280 days) to the first day of your last menstrual cycle. This 280 days is based upon 266 days of gestation (the length of a typical pregnancy) plus the 14 days from the start of your last menstrual period (LMP). Only 5% of women deliver their babies on their estimated due date (EDD), so this date should be used only as a guide - it is not an exact calculation.