Question 1

How is the pregnancy due date calculated?

Accepted Answer

The due date is typically calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This is known as Naegele's rule and is the standard method used by healthcare providers.

Question 2

How accurate is a due date calculator?

Accepted Answer

Only about 5% of babies are born on their exact due date. Most babies arrive within a two-week window around the estimated date. Ultrasound dating in the first trimester is generally the most accurate method.

Question 3

What is gestational age?

Accepted Answer

Gestational age measures how far along a pregnancy is, counted from the first day of the last menstrual period. A full-term pregnancy is 39-40 weeks gestational age.

Pregnancy Due Date Calculator

Frequently Asked Questions

Pregnancy Due Date Calculator

Frequently Asked Questions

How is my due date calculated?

How accurate is this calculator?

What if I have an irregular cycle?

Can my due date change?