Age Calculator
Calculate age in calendar years, months and days on a chosen date.
Inputs stay on your device; no account required.
Calendar calculation without time zones. Month-end anniversaries use the last valid day: a February 29 birthday reaches its anniversary on February 28 in non-leap years. Not a legal age determination.
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About this tool
Calculate age in calendar years, months and days on a chosen date. Calendar calculation without time zones. Month-end anniversaries use the last valid day: a February 29 birthday reaches its anniversary on February 28 in non-leap years. Not a legal age determination.
How to use
- Enter the birth date and the date on which to calculate age.
- Calculate and compare calendar years, months and days with the total day count.
Example
1988-01-15 to 2026-10-12 → 38 years, 8 months, 27 days.
Common question
How are leap-day birthdays handled?
Calendar calculation without time zones. Month-end anniversaries use the last valid day: a February 29 birthday reaches its anniversary on February 28 in non-leap years. Not a legal age determination.