Corrected Age Calculator
Calculate your premature baby's corrected (adjusted) age based on their birth date and gestational age at birth. Used by pediatricians to track developmental milestones accurately.
What Is Corrected Age?
Corrected age (also called adjusted age) accounts for prematurity when tracking a baby's development. It's calculated by subtracting the number of weeks born early from the baby's actual (chronological) age.
For example, if your baby was born at 32 weeks (8 weeks early) and is now 6 months old chronologically, their corrected age is about 4 months. Pediatricians use corrected age to assess milestones like rolling over, sitting, crawling, and first words — because preemies need that extra time to catch up.
Most doctors use corrected age until the child is 2 to 3 years old, after which most preemies have caught up developmentally. Need a general age calculator? Try our Chronological Age Calculator or How Old Am I? tool.
Frequently Asked Questions
How long should I use corrected age?
Most pediatricians recommend using corrected age for developmental assessments until your child is 2 to 3 years old. After that, most premature children have caught up with their peers.
Where do I find my baby's gestational age?
Your baby's gestational age at birth is recorded in hospital discharge papers and medical records. It's usually written as "XX weeks + X days" (e.g., "32 weeks + 4 days").
Is corrected age the same as adjusted age?
Yes. "Corrected age" and "adjusted age" mean the same thing — both refer to the age calculated from the original due date rather than the actual birth date.
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