Calculator
Age calculator
Calculate complete age in years, months and days on a selected date. Data is processed only in your browser, and the page explains the formula and limitations of the result.
Reviewed: 3 August 2026Processed locally
Calculator
Enter data
Date of birth and the date on which age is calculated. Fields marked with an asterisk are required.
How to use the calculator
- Enter the required data: date of birth and the date on which age is calculated.
- Check the values and select “Calculate”.
- Review the primary result and the detailed calculation components.
Calculation details
Formula and calculation method
Calendar age subtracts complete years, then complete months and remaining days between the dates.
Worked example
A person born on 15 May 2000 is exactly 26 complete years old on 15 May 2026.
Limitations
- This uses the Gregorian calendar and does not decide legal attainment of age in a special procedure.
Sources
Engine version: 1.0 · Last reviewed: 3 August 2026
Frequently asked questions
Is the entered data sent to a server?
No. The calculation runs locally in your browser and the values are not saved by default.
Is the result definitive?
Not always. This uses the Gregorian calendar and does not decide legal attainment of age in a special procedure.