Gestational Age Calculator – Track Pregnancy Stage by LMP or EDD- Week by Week
Pregnancy is usually counted in weeks — not months. But how do you know how far along you are? This free Gestational Age Calculator helps you track your pregnancy accurately based on your LMP (Last Menstrual Period) or your EDD (Estimated Due Date).
👉 Try the Gestational Age Calculator Now
Gestational Age Calculator
Based on standard OB-GYN protocols and research
What Is Gestational Age?
Gestational age is the age of the pregnancy, measured in weeks and days from the first day of your last period (not conception).
- A full-term pregnancy = 40 weeks
- Most due dates are calculated from LMP, not the day of fertilization
🗓️ Doctors and midwives use gestational age to:
- Track fetal development
- Schedule ultrasounds and tests
- Determine delivery plans
How the Gestational Age Calculator Works
You can calculate gestational age using:
- 🩸 LMP (Last Menstrual Period)
- 📅 EDD (Estimated Due Date)
👉 Just enter one of the two, and the calculator will show:
- Current gestational age (in weeks + days)
- Estimated due date (if not entered)
- 🍼 Trimester and stage of pregnancy
Example
LMP: March 1, 2025
Today’s Date: July 5, 2025
Gestational Age: 18 weeks, 3 days
✅ You are in the second trimester.
Why Accurate Gestational Age Is Important
- 📅 Schedules ultrasounds and prenatal testing
- 🧠 Tracks fetal milestones
- 🛏️ Plans maternity leave and hospital visits
- 🚑 Ensures timely care for preterm or overdue deliveries
Who Should Use This Calculator?
- Expecting parents
- OB-GYN clinics and nurses
- Health bloggers and baby websites
- IVF and fertility treatment patients
- Anyone tracking pregnancy naturally