Age Calculator
Calculate an exact age in years, months and days from a birth date.
How to use this calculator
Enter the requested values, then select Calculate. Results are processed locally in your browser for this static website.
Accuracy notes
Results may be affected by rounding, unit conventions and the assumptions shown by the calculator. Verify important calculations independently.
What this calculator solves
Calculate an exact age in years, months and days from a birth date. This page provides the interactive calculation together with a plain-language explanation so the result can be checked against the underlying method.
Science and formulae
Age is determined by comparing the birth date with the selected reference date, accounting for calendar month lengths and leap years.
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