👶Health & Pregnancy

Baby Age Calculator — Free Online

Calculates a baby's exact age in weeks and months from their date of birth.

Age Calculator

How to Use the Baby Age Calculator

  1. Enter your input values using the fields in the calculator above
  2. Select any additional options (units, format, timezone) if applicable
  3. Click the Calculate button to get your instant result
  4. Copy the result using the Copy button for use elsewhere
  5. Scroll down for real-world examples and explanations

About the Baby Age Calculator

Calculates a baby's exact age in weeks and months from their date of birth. This tool uses the proleptic Gregorian calendar and the IANA timezone database for accurate results across all dates, timezones, and leap years.

All formulas validated by Vipul Jaganiya, Computer Science expert in Calendar Mathematics and Timezone Engineering.

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