Age Calculator
Calculate exact age in years, months and days, total time lived, birth weekday and the countdown to the next birthday.
Age Calculator: Age Calculator finds exact age between two dates in years, months and days and also shows useful totals and the next birthday.
Age Calculator
| Measurement | Approximate total |
|---|---|
| Calculate age to see totals. | |
About Age Calculator
Age Calculator compares a date of birth with a selected calculation date and reports the calendar difference in years, months and days. It also provides useful totals such as months, weeks, days, hours and minutes, identifies the weekday of birth and estimates the date and countdown for the next birthday. A custom end date makes the tool useful for historical age checks as well as today's age.
Calendar age is not the same as dividing total days by 365 because months and leap years have different lengths. The calculator uses calendar boundaries for the main age result and elapsed time for the totals. People born on 29 February can encounter different legal or customary birthday handling in non-leap years, so official eligibility decisions should follow the relevant authority's rules. Check that dates are entered in the intended order and timezone before using the result on a form.
How to use Age Calculator
- 1Enter the date of birth.
- 2Use today or choose another calculation date.
- 3Select Calculate Age.
- 4Review calendar age, total elapsed time and next birthday.
- 5Copy or print the result if needed.
Features
Examples
Frequently asked questions
Why is age not just total days divided by 365?
Calendar years and months vary in length, and leap years add an extra day.
Can I calculate age on a past or future date?
Yes. Change the calculation date from today to the required date.
How are 29 February birthdays handled?
The calculator follows calendar arithmetic, but legal birthday rules in non-leap years can vary by jurisdiction.
Does the tool store my date of birth online?
The calculation runs in the browser. Avoid sharing the result if it contains personal information you want to keep private.