How Does the Delivery Date Calculator Work?

The delivery date calculator uses two main methods to calculate your due date: the Last Menstrual Period (LMP) and the Conception Date. Depending on the information you have, you can use either method for an accurate estimate.

1. Using the Last Menstrual Period (LMP)

One of the easiest ways to calculate your due date is by using the first day of your last menstrual period (LMP). This approach assumes a 28-day menstrual cycle. Here’s how it works:

• First, you need to know the first day of your LMP.
• Then, the calculator will count back three months from this date.
• Finally, it will add one year and 7 days to this date, giving you your estimated due date.

2. Using the Date of Conception

It is also possible to find your due date if you know the exact day of conception. In this case, you simply count 38 weeks (or 266 days) from the conception date. This method is often more accurate for those who know exactly when they conceived, as it does not rely on the average menstrual cycle.

Why Use a Delivery Date Calculator?

Using a delivery date calculator is helpful for several reasons. It allows expectant parents to:

• Get ready for labor and delivery on both a mental and physical level.
• Schedule prenatal checkups and screenings.
• Throughout the pregnancy, keep watch on the baby's progress. While the calculator gives a great estimate, it’s important to remember that the actual delivery date can vary. Babies can arrive a few days earlier or later than the estimated date, so it's always a good idea to stay flexible.