GA calculator

Gestational Age & Estimated Due Date (EDD) Calculator

Last Menstrual Period (LMP):

Reference Date (Today):

📅 Estimate:

• Gestational age (how far along the pregnancy is)
• Estimated due date (EDD) of delivery
• Trimester timeline
• Important milestones (like the timing of ultrasounds or screenings)

🧮 How It Works:

The calculator assumes a 28-day menstrual cycle, with ovulation around day 14. Here's the typical process:

1. Input the first day of your last period (LMP).
2. The calculator adds 280 days (or 40 weeks) to that date to estimate the due date.

📝 Example: If your LMP was January 1, 2025:

• Estimated Due Date (EDD) = October 8, 2025

⚠️ Limitations:

• It's an estimate, not an exact science.
• Cycle length variations and irregular periods can affect accuracy.
• Ultrasound can provide a more precise dating, especially in the first trimester.