Pregnancy Due Date Calculator

Estimate your baby's due date based on the first day of your last menstrual period.

What is a Pregnancy Due Date Calculator?

A Pregnancy Due Date Calculator is a simple tool used to estimate when your baby will be born. It works by taking the first day of your last menstrual period (LMP) and calculating forward 40 weeks (or 280 days), which is the average length of a human pregnancy. This calculator provides an estimated due date (EDD), which helps expectant parents and healthcare providers plan for the baby's arrival. It also calculates the gestational age, which is how many weeks pregnant you currently are.

How to Use the Due Date Calculator

Estimating your due date is very easy. All you need is one piece of information:

  1. First Day of Last Menstrual Period: Using the calendar, select the date that your last period started. For example, if it began on January 15, 2024.

After selecting the date, the calculator will instantly display your estimated due date and your current progress in weeks.

Why Use an Online Due Date Calculator?

An online due date calculator is one of the first tools expectant parents use, for several good reasons:

  • Quick and Simple: It provides an immediate estimate, which is exciting for newly expectant parents and useful for initial planning.
  • Standardized Method: It uses Naegele's rule (adding 280 days to the LMP), which is the standard method used by doctors and midwives worldwide for initial estimation.
  • Convenient for Planning: For families in India and everywhere, knowing the approximate due date helps in planning maternity leave, preparing the home, and scheduling necessary medical check-ups.

Frequently Asked Questions (FAQ)

Q: How accurate is the due date calculator?

A: The calculator provides an estimate. Only about 5% of babies are born on their exact due date. It's based on a 28-day cycle, so if your cycle is different, the date may be slightly off. An ultrasound is the most accurate way to determine the due date.

Q: What if I don't know the date of my last menstrual period?

A: If you have an irregular cycle or cannot recall your LMP, a doctor can provide a more accurate due date through an early ultrasound scan, which measures the baby's size.