Adjusted Age Calculator

An Adjusted Age Calculator serves to assist parents as well as health care professionals in estimating the correct age for development of a preterm infant. With the help of an Adjusted Age Calculator, caregivers can anticipate a child's development and growth based on the estimated due date instead of the actual birth date. If a baby was born before the full period of gestation, which is 40 weeks, then specific milestones for his/her development will differ from that of a full term baby. 

As an example, a baby who is born at 32 weeks is 8 weeks preterm, and therefore, if he or she is 2 months old chronologically, then their adjusted age is 0 months.

What is Adjusted Age?

Adjusted age is sometimes referred to as corrected age and it is how old the baby is calculated from the expected due date rather than the actual date of birth. It is particularly useful in tracking the development and progress of growth in babies born prematurely.

The adjusted age is crucial for:

• Developmental assessments (such as motor skills, cognitive abilities, and speech development)
• Growth charts (ensuring accurate tracking of weight, height, and head circumference)
• Understanding feeding habits and sleep cycles

How to Calculate Adjusted Age

To calculate the corrected gestational age in weeks, use the following formula:

Adjusted Age = Chronological Age - Weeks Premature

Step-by-Step Calculation:

1. Determine the chronological age (baby’s age from the birth date).
2. Find out the weeks premature by subtracting the baby's gestational age from 40 weeks.
3. Subtract the weeks premature from the chronological age to get the adjusted age.

Example Calculation:

• Baby’s birth date: June 1, 2023
• Gestational age at birth: 32 weeks
• Current date: December 1, 2023
• Chronological age: 6 months (26 weeks)
• Weeks premature: 40 - 32 = 8 weeks
• Adjusted age: 26 - 8 = 18 weeks (4.5 months)

Table for Quick Adjusted Age Reference

Do You Use Adjusted Age for Growth Charts?

Yes, adjusted age is used for growth charts, especially for premature infants. Pediatricians use the corrected age preterm method until the baby is around 24 months old. After 2 years, most children have caught up, and chronological age is used.

Do You Use Adjusted Age for Babies Born at 37 or 38 Weeks?

• Babies born at 37 weeks are considered early-term, and adjusted age is typically not used unless they have significant developmental delays.
• For babies born at 38 weeks, adjusted age is rarely needed since they are close to full-term.

Neonatal Age Calculator for Preemies

A neonatal age calculator helps track a premature baby’s growth and progress using adjusted age. You can use our Corrected Gestational Age Calculator in Weeks to estimate milestones accurately.

How to Use the Adjusted Age Calculator?

Using our Adjusted Age Calculator Pearson, follow these simple steps:

1. Enter the gestational age at birth (e.g., 32 weeks).
2. Enter the baby’s birth date.
3. Select the current date to calculate the adjusted age.
4. The calculator will instantly show the corrected gestational age in weeks and months.

Final Verdict

The Adjusted Age Calculator is a vital tool for parents and doctors to monitor premature baby development. It provides an accurate estimation of your baby’s growth milestones and ensures a more precise evaluation of their physical and cognitive progress.

If your baby was born early, always consider the corrected age when evaluating their milestones. By 2 years of age, most premature babies catch up, and doctors transition to using the chronological age instead.

FAQs

How do you calculate adjusted age?

Adjusted Age = Chronological Age - Weeks Premature

How long do you use adjusted age for a premature baby?

Adjusted age is used until 24 months of age for developmental tracking.

Should I use adjusted age for my baby’s milestones?

Yes, if your baby was born before 37 weeks, use adjusted age for milestones like rolling over, crawling, and walking.

Can I use adjusted age for a baby born at 36 weeks?

Yes, adjusted age can be used until around 12-18 months for better milestone tracking.

Does the adjusted age affect vaccine schedules?

No, vaccines follow the chronological age schedule, not the adjusted age.