Your Pregnancy Timeline
This calculator provides estimates and is not a substitute for medical advice.
An Estimated Date of Delivery (EDD) Calculator helps expectant mothers know when their baby might arrive. The tool uses your conception date or the first day of your last menstrual period to predict the due date. It also shows trimester milestones and delivery windows. Remember, this is only an estimate—babies often come earlier or later than the exact date.
How the Calculation Works
The calculator counts about 280 days (40 weeks) from the first day of your last period or 266 days (38 weeks) from the date of conception. This matches the average length of pregnancy. The due date is not exact but gives a good guideline for planning and medical checkups.
Example Calculation
- Date of Conception: 25 August 2025
- Estimated Due Date: Monday, 18 May 2026
- Current Gestation: 1 week 6 days
- Likely Delivery Window: 4 May – 1 June 2026
- Second Trimester Begins: 17 November 2025
- Third Trimester Begins: 23 February 2026
This timeline shows how your pregnancy is divided into stages. Most babies arrive within two weeks before or after the due date.
Why It Matters
Knowing your estimated due date helps you schedule prenatal visits, ultrasounds, and plan for delivery. Doctors also use this date to monitor your baby’s growth and development. It is important to remember that very few babies are born exactly on the predicted day.
Limitations
Every pregnancy is unique. The due date can change if your cycle length is unusual or if ultrasound measurements suggest different growth patterns. Always follow your healthcare provider’s advice.
Conclusion
An EDD calculator is a helpful guide for expecting mothers. It makes it easy to track pregnancy progress and prepare for the baby. Still, only a doctor can confirm the due date with proper tests and care.
Disclaimer: This calculator is for informational purposes only. It does not replace medical advice. Always follow guidance from your healthcare provider.