Home
Back
Pampers EDD Formula:
| From: | To: |
The Pampers Due Date Calculator estimates your baby's expected arrival date based on the first day of your last menstrual period (LMP). This follows the standard method used by healthcare providers to calculate estimated due dates.
The calculator uses the standard pregnancy calculation formula:
Where:
Explanation: This calculation assumes a regular 28-day menstrual cycle and ovulation occurring on day 14. The 280 days represent 40 weeks of pregnancy.
Details: Knowing your estimated due date helps you and your healthcare provider monitor fetal development, schedule prenatal appointments, and prepare for your baby's arrival. It also helps track pregnancy milestones and identify potential concerns.
Tips: Enter the first day of your last menstrual period in the date field. Make sure to use the correct date format and select the accurate first day of your last period for the most precise calculation.
Q1: How accurate is this due date calculation?
A: This method is about 70% accurate for predicting delivery within one week of the estimated date, and about 90% accurate within two weeks.
Q2: What if I have irregular periods?
A: If you have irregular cycles, an early ultrasound (usually between 8-12 weeks) provides a more accurate due date estimation.
Q3: Why 280 days instead of 9 months?
A: Pregnancy is calculated as 40 weeks from LMP, which equals 280 days. This differs from calendar months due to varying month lengths.
Q4: Can my due date change?
A: Yes, healthcare providers may adjust your due date based on ultrasound measurements, especially if there's a significant difference from the LMP calculation.
Q5: What percentage of babies are born on their due date?
A: Only about 5% of babies are born exactly on their due date. Most births occur within two weeks before or after the estimated date.