Pregnancy Calculator

Estimate your due date based on your last menstrual period.

First Day of Last Period

Cycle Length (days)

Estimated Due Date

What is this Online Pregnancy Calculator for?

The Pregnancy Calculator estimates your baby's due date (EDD) based on the first day of your last menstrual period (LMP). It is the standard method used by healthcare providers.

How does it work?

It adds 280 days (40 weeks) to your LMP, adjusting for your average cycle length if it differs from the standard 28 days.