Adjusted Age Calculator
Calculate corrected age for premature babies to assess proper development milestones
Calculate Adjusted Age
Date for which to calculate adjusted age
Actual date when the baby was born
Weeks (20-42)
Days (0-6)
Age Calculation Results
Enter birth date and current date to calculate adjusted age
Development Assessment
Prematurity Classifications
Full Term
37+ weeks gestation
No age adjustment needed
Moderately Preterm
32-36 weeks gestation
Most common type of prematurity
Very Preterm
28-31 weeks gestation
Requires intensive care
Extremely Preterm
<28 weeks gestation
Highest risk, specialized care
Key Facts
Use adjusted age until 24 months for development
Full term pregnancy is 40 weeks (280 days)
Preterm is born before 37 weeks
AAP, CDC, and ACOG recommend age adjustment
Why Adjust Age?
Prevents misdiagnosis of developmental delays
Ensures appropriate medical care
Guides vaccination schedules
Helps track growth patterns
Understanding Adjusted Age for Premature Babies
What is Adjusted Age?
Adjusted age (also called corrected age) is a method of calculating the age of babies born before 37 weeks of gestation. It accounts for the time they would have spent developing in the womb if they had been born at full term.
Why is it Important?
- •Provides accurate developmental assessment
- •Prevents unnecessary interventions
- •Guides appropriate expectations
- •Helps with growth chart interpretation
Calculation Methods
Method 1: Gestational Age
Days early = 280 - gestational age at birth (in days)
Adjusted age = chronological age - days early
Method 2: Due Date
Days early = due date - actual birth date
Adjusted age = chronological age - days early
Important: Use adjusted age until 24 months, then switch to chronological age for all assessments.
⚠️ Medical Disclaimer
This calculator provides educational information only and should not replace professional medical assessment. Adjusted age calculation is crucial for proper developmental evaluation of premature babies. Always inform healthcare providers that your child was born prematurely and discuss appropriate developmental expectations. For concerns about development, growth, or health, consult with pediatricians or specialists familiar with premature infant care.