Adjusted Age Calculator

Estimate adjusted age for a baby born before full term.

Important note

Adjusted age is a developmental reference, not a diagnosis. Ask a pediatric clinician for medical or milestone decisions.

Adjusted age basics

Adjusted age, also called corrected age, subtracts the number of weeks a baby was premature from chronological age.

It is often used for developmental milestone conversations during infancy and early childhood, especially for babies born several weeks early.

These tools help express baby age in calendar, week, month, and prematurity-adjusted formats.

Calculate chronological and prematurity-adjusted age for ASQ planning.

Calculate a baby's age in months, weeks, days, and exact calendar age.

Subtract premature weeks from chronological age.