Online calculators for pregnancy.
We use Naegele's rule to find baby due date to calculate the conception date. Since, it is difficult to know when ovulation exactly occurs, the conception date of the child is assumed to be two weeks into the last menstrual cycle before pregnancy. The start date of the last period is taken as 40 weeks ahead of the estimated date of delivery or the real birth date, assuming a gestation period of 40 weeks.
You can also use this conception calculator to find how many weeks you are into your pregnancy given the due date. To find pregnancy weeks by last menstrual period, use the due date calculator.
Android app: Use this ovulation calculator offline with our all-in-one calculator.
Disclaimer:- The content of this website does not constitute medical advice and is solely meant for information purpose.