Due Date Calculator

Using the due date calculator you can estimate your pregnancy due date. Enter the date of your last menstrual period and the average length of cycles in the appropriate fields. The calculator will give you an estimated conception date, estimated due date, and an estimated fetal age.

Find Out When Your Baby is Due Using the Due Date Calculator

Pregnancy Date Calculator
Your personal pregnancy timeline

Enter the first day of your last menstrual period and click "Calculate":

Month: Day: Year:

Your Approx. Date of Conception is:
(Approximately two weeks after your last menstrual period)

You're in your 1st Trimester (weeks 1-12)

Your period of greatest risk for birth defects is:
(Five to ten weeks gestational age)


Your baby's fetal organ formation begins

Your baby's major organs have formed:

Your risk of miscarriage decreases:
(weeks 12-27)

If your baby is premature, but born after this date, s/he has a chance to survive:

Your Third Trimester begins on:
(27 weeks)

Your Due Date is:
(40 weeks - full term)