Pregnancy Calculator

This free **pregnancy calculator online** helps you **calculate pregnancy from LMP** (last menstrual period). By entering the first day of your last period and average cycle length, the tool estimates your **due date**, **gestational age**, and current **pregnancy week**.

First Day of Last Menstrual Period (LMP) Average Cycle Length (days)

How This Calculator Works

The **gestational age calculator** adds 280 days (40 weeks) to your LMP to predict the **due date**. It also shows how many weeks pregnant you are today.

Example:

If your LMP was January 1 and cycle length is 28 days, then:

• Estimated Due Date → October 8
• Gestational Age → 10 weeks 3 days
• Pregnancy Week → 11

Note: This tool provides an estimate. Consult a doctor for accurate medical advice.