Home
Back
EDD Calculation Formula:
| From: | To: |
The Baby Calculator Conception estimates the due date (EDD) based on the conception date. It calculates the expected delivery date by adding 266 days to the known conception date, providing an accurate pregnancy timeline.
The calculator uses the simple formula:
Where:
Explanation: This calculation assumes a standard 266-day gestation period from conception to delivery, which corresponds to 38 weeks of pregnancy.
Details: Accurate due date calculation is essential for proper prenatal care, monitoring fetal development, planning for delivery, and ensuring the health of both mother and baby throughout pregnancy.
Tips: Enter the known conception date in the date field. The calculator will automatically compute and display the estimated due date. Ensure the conception date is accurate for the most reliable result.
Q1: Why 266 days instead of 280 days?
A: 280 days is calculated from the first day of the last menstrual period (LMP), while 266 days is from the actual conception date, accounting for the typical 2-week difference.
Q2: How accurate is this calculation?
A: When the conception date is known precisely, this method is highly accurate. However, actual delivery dates can vary by ±2 weeks from the estimated date.
Q3: What if I don't know my exact conception date?
A: If the conception date is unknown, use the LMP method (LMP + 280 days) or consult with a healthcare provider for ultrasound dating.
Q4: Does this account for leap years?
A: Yes, the calculator automatically accounts for leap years and varying month lengths in the date calculation.
Q5: Can I use this for IVF pregnancies?
A: For IVF pregnancies, the conception date is precisely known, making this calculation method particularly accurate and reliable.