Baby Age Calculator
Exact age of your child in years, months, weeks, and days \u2014 for milestone tracking.
Baby milestones + development
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About this tool
Pediatricians and childcare use different age units: pediatric wellness visits are scheduled in months (1, 2, 4, 6, 9, 12, 15, 18, 24), sleep schedules in weeks, and vaccination schedules by exact days. This calculator gives all four units so you can match your child's age to any reference chart.
Formula & notes
Computes precise elapsed time from birth date to today (or a target date). Also shows the child's age at their next milestone — 100 days, 1000 days, 1 year, 2 years, first birthday-anniversary week, etc. Useful for building shareable milestone posts or reminders. All computation is local; birth date is never sent to a server.
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