Due Date Calculator
Frequently Asked Questions
How is the due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period. This method is known as Naegele's rule and is the standard method used by healthcare providers.
How accurate is the due date calculator?
The calculator provides an estimate based on a regular 28-day cycle. Only about 5% of babies are born on their exact due date. Most babies are born within two weeks before or after the calculated date.
What if my cycles are irregular?
If your cycles are irregular, the calculator may be less accurate. In this case, an early ultrasound can provide a more accurate due date. Consult with your healthcare provider for the most accurate estimation.
When should I schedule my first prenatal visit?
Most healthcare providers recommend scheduling your first prenatal visit as soon as you know you're pregnant, typically between weeks 6-8 of pregnancy.