Use this calculator to determine the milestones during your pregnancy. Our calculator uses the number of weeks since your last menstrual period to describe how far along you are in your pregnancy. Enter the first day of your last menstrual period, then press 'Calculate'..

Knowing your due date during pregnancy is important from many points of view. Firstly, it helps to monitor fetal development, correlating ultrasonographic findings with the actual gestational period. Many a times, a disparity in these findings could indicate a problem such as intrauterine growth retardation. A full term pregnancy can last from 38 to 42 weeks. Delivery before this period leads to premature birth and carries various health risks to the fetus, and if there are no labor pains up to 42 weeks, an induction of labor or a caesarian section delivery becomes necessary.

Naegele’s rule is a simple way of calculating the pregnancy due date. Adding 9 calendar months and 7 days to the first day of the last menstrual period gives the approximate due date for delivery.