Baby Age Calculator

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

Baby age formats

Baby age is often discussed in months or weeks rather than only years. This page shows exact age, total weeks, total days, and the next month milestone.

Milestone context

Developmental milestones vary. For premature babies, adjusted age may be more helpful during early development.

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Baby Age Calculators overview

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

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Related age calculators

Adjusted Age Calculator

Estimate adjusted age for a baby born before full term.

ASQ Age Calculator

Calculate chronological and prematurity-adjusted age for ASQ planning.

Calculate baby age

See age in months, weeks, days, and exact calendar units.