Pregnancy Due Date Calculator

Estimate your baby’s due date using this simple calculator. The calculation is based on the date of your **last menstrual period (LMP)**, adding **280 days (or 40 weeks)** — which is the typical length of pregnancy.

Select your Last Menstrual Period (LMP):


Calculate Due Date

How the Due Date is Calculated

This tool uses Naegle’s Rule, which estimates the due date by:
Due Date = LMP + 280 days (40 weeks)

Please note: This is an estimate. Ultrasound scans and doctor visits can provide more precise timelines.