Due Date Calculator

This free **pregnancy due date calculator** estimates your expected delivery date (EDD) using the first day of your last menstrual period (LMP). Doctors often calculate pregnancy due dates using the Naegele’s Rule – adding 280 days (40 weeks) to the LMP date.

First Day of Last Menstrual Period (LMP)

How This Calculator Works

The **EDD calculator** works by adding 280 days (40 weeks) to the LMP date. This gives an estimate of your baby’s expected arrival. Ultrasound scans may provide a more accurate due date depending on your cycle.

Example:

If your LMP was January 1, 2025, then:

• Estimated Due Date → October 8, 2025
• Pregnancy Length → 40 weeks

Note: This calculator is for informational purposes only. Always consult your healthcare provider for accurate medical advice.