calculate due date Pregnancy Due Date Calculator

Expected Date of Delivery (EDD)

Calculation of the pregnancy due date or the expected date of delivery (EDD) of your baby is possible by using this unique pregnancy due date calculator. Just enter the 1st day of your last menstrual period below and you can find the expected date of delivery or your due date. Pregnancy, on average, lasts 267 days (38 weeks) from conception. If you positively know your conception date, you can add 267 days to it for your due date. A simple formula for calculation of your due date is also provided after this pregnancy due date calculator.

 

Due Date Calculation


Last Menstrual Period: (MM/DD/YYYY format) Average Length of Cycles: (22 to 45) (defaults to 28) Average Luteal Phase Length: (9 to 16) (defaults to 14)
Estimated Conception: Estimated Due Date: Estimated Fetal Age:
 

Use our due date calculator to work out when you might expect your baby to arrive. This will give you a rough idea. As part of your antenatal care, your midwife or doctor will also offer you a dating scan that will give you a more accurate due date for the birth of your baby.

Due Date Calculator

Pregnancy, on average, lasts 267 days (38 weeks) from conception. If you positively know your conception date, you can add 267 calendar days to it to calculate your pregnancy due date.

The following formulas can also tell your Expected Due Date :

Date of the first day of your last period + 281 days = due date

or

Date of the first day of your last period + 7 days - 3 months = due date

The due date calculation methods here are based on the average 28-day cycle.

If you don't like arithmatic calculation, you can just use our Due Date Calculator above.