Pregnancy Due Date Calculator

The average cycle is 28 days. Adjust if yours is different.

Enter your LMP date to estimate your due date and track your pregnancy timeline.

This calculator uses Naegele's rule, a standard method for estimating a due date. It works by:

  1. Taking the first day of your last menstrual period (LMP).
  2. Adding 280 days (40 weeks) to that date.
  3. Adjusting for your cycle length. The standard 280 days assumes a 28-day cycle. If your cycle is longer or shorter, the calculator adjusts the due date accordingly.

No, this is an estimated due date (EDD). Only about 5% of babies are born on their exact due date. It provides a valuable guideline, but your actual delivery date can vary. An ultrasound performed by a healthcare professional will give a more accurate date.

This tool is for informational purposes only and should not replace professional medical advice. Always consult with a doctor or other qualified healthcare provider for any questions you may have regarding your pregnancy.