Adjusted Age Calculator for Premature Babies
Calculate your premature baby's adjusted (corrected) age based on gestational age at birth for accurate milestone tracking.
How It Works
Enter your baby's date of birth and gestational age at birth in weeks. The calculator computes the corrected age that should be used for milestone tracking, growth charts, and developmental assessments until age 2-3.
Formula
Adjusted Age = Chronological Age − (40 weeks − Gestational Age at Birth)
Frequently Asked Questions
How long should I use adjusted age?
Pediatricians typically recommend using adjusted age for developmental milestones until 2 years of age for babies born before 32 weeks, and until 1 year for those born between 32-37 weeks.
Does adjusted age apply to all growth measurements?
Yes. Use adjusted age for both growth charts and developmental milestones. By age 2-3, most preterm babies catch up and adjusted age is no longer needed.