About this tool
Enter a birth date to see age broken down into years, months and days, plus the total number of days lived. Set an as-of date if you need age on a past or future day rather than today.
How to use Age Calculator
- Enter the birth date.
- Optionally change the as-of date from today.
- Read the age in years, months and days.
Frequently asked questions
Can I calculate age on a specific date?
Yes. Change the As of field. It defaults to today.
What if the birth date is after the as-of date?
The tool shows an error. The as-of date must be on or after the birth date.
Is my date stored?
No. Dates stay in the page only, and are cleared 5 minutes after your last change.