Gestational Age Calculator from EDD – Pregnancy Week by Due Date

If you already know your Estimated Due Date (EDD), this calculator helps you find your current gestational age — in weeks, days, and trimester.

Gestational Age Calculator from EDD – Pregnancy Week Tracker
Gestational Age from EDD
Reviewed by Dr. Anjali Mehra, MD – Obstetrician & Gynecologist
Last reviewed: July 2025

It’s a quick and accurate way to track your pregnancy week, especially if you don’t remember your LMP date. Built using medical-grade calculation logic.

👉 Built using medical-grade calculation logic.

How to Use the Gestational Age by EDD Calculator

  1. Enter your Estimated Due Date
  2. Click Calculate
  3. The tool shows:
    • 📅 Current gestational age (weeks + days)
    • 🍼 Trimester status
    • ⏳ Time left until delivery

What Is an EDD (Estimated Due Date)?

EDD is the approximate date when a baby is expected to be born, EDD is typically 280 days (40 weeks) from the first day of LMP.
It is usually determined based on:

  • 📆 Your LMP date
  • 📈 A dating ultrasound scan
  • 🧪 IVF transfer dates (if applicable)

EDD helps doctors monitor growth, tests, and delivery planning.

Example

EDD: 10 November 2025
📆 Today’s Date: 5 July 2025
✅ Gestational Age: 22 weeks, 3 days
✅ Trimester: Second

Why Use EDD Instead of LMP?

  • 🔍 Ultrasound gives a more accurate EDD (especially if periods are irregular)
  • 👶 IVF pregnancies use embryo transfer date
  • 📋 Best when LMP is unknown or unreliable

This tool reverses the EDD to show gestational age as of today. This is especially useful after first trimester when EDD is ultrasound-confirmed.

Who Can Use This Tool?

  • 🤰 Pregnant women tracking progress
  • 🩺 Doctors & midwives
  • 📱 Health websites and pregnancy apps
  • 💬 Support groups and educators

Pregnancy & Baby

IVF Due Date Calculator Baby Weight & Age Calculator Pregnancy Age Calculator Track Pregnancy Stage Gestational Age Calculator by LMP

FAQ

A: It is a tool that calculates the current gestational age of a pregnancy based on the Estimated Due Date (EDD). It tells you how far along you are in weeks and days.

A: Gestational age calculated from EDD is quite accurate if the EDD is based on early ultrasound or the first day of your last menstrual period (LMP).

A: Yes, you can use other tools like LMP-based calculators or ultrasound-based gestational age calculators if the EDD is unknown.

A: This specific calculator is based on natural conception dates. For IVF pregnancies, use an IVF-specific gestational age calculator.

The calculator also tells you your current trimester:

  • 1st trimester: 0–13 weeks
  • 2nd trimester: 14–27 weeks
  • 3rd trimester: 28 weeks onwards