Due Date Calculator

Due Date Calculator Not sure when your baby is due? Use our handy due date calculator to work out the approximate date.
Enter the first day of your last menstrual period

Number of days in your menstrual cycle:

Probable Date of Ovulation:
Possible Dates of Conception:	to
End of First Trimester (13 weeks):
End of Second Trimester (27 weeks):
Your Due Date (40 weeks):
Print out these dates. How many weeks am I pregnant Now? - Fetal Development Pages To know your week by week dates use our Pregnancy time line calculator

	Use our Pregnancy Due Date Calculator to find out when your baby is due, and get started planning for that exciting arrival. Your doctor or midwife uses the number of weeks since your last menstrual period to estimate how far along you are in your pregnancy. This calculation is for an average pregnancy (40 weeks). Your pregnancy may be longer or shorter. Only 5 percent of women deliver their babies on their projected due date. 10 percent of first time pregnancies continue on until two weeks past the due date. 70 percent of pregnancies that go post term are actually dated incorrectly from the start. So this date should be used as an estimate; it is not an exact calculation.

	Week by Week Fetal Development
	Now you know your estimated due date, find out how your baby develops over the weeks and months while inside. The Week by Week Fetal Development pages show you just what is happening and when, to baby and you in your pregnancy.