Everyday & dates
Age calculator
Calculate age in calendar years, months and days on any reference date.
Your result
Enter your values and calculate. Changing an input clears the previous result.
How this calculation works
Uses the Gregorian calendar, counting complete years, then months, then remaining days. A 29 February anniversary falls on 28 February in non-leap years. Total days is the elapsed date difference, without time-of-day or timezone effects.
Worked example
From 1 January 1990 to 1 January 2026: 36 years, 0 months and 0 days.