Due Date Calculator

Due Date Calculator

If you know when your baby was conceived, you may have already estimated your baby’s due date. At your first prenatal exam, your healthcare provider will ask you questions to predict your due date.

Knowing your baby’s due date can help in many ways. It helps to monitor your baby’s growth throughout the pregnancy. Different tests are performed throughout your pregnancy to ensure that your baby is healthy. Knowing the approximate due date will assist in the accuracy of these tests. It will also help your doctor to manage preterm labour if it is required.

How Is My Expected Date of Delivery Determined?

Normally, your due date is 280 days (40 weeks or about 10 months – yes, 10 months!) from the first day of your last mensus (period). However, if your menstrual cycles are not regular, or are not 28 days in cycle, your due date may be different from the “280 day rule.” Your healthcare provider may order an ultrasound to more accurately determine your due date.

If you are certain of the date of conception (the date you became pregnant), be sure to tell your healthcare provider. This information can be helpful in determining your estimated date of delivery (EDD) or date of birth.

A full-term pregnancy is considered to be 37 to 42 weeks in length. This means that the birth of your child can be different from your estimated date of delivery. This is very common, so there is no need to worry. Only a small number of babies are actually born on their due dates.

(Please find the Calculator tool on the right-hand side of this page)