Free tool · nothing is uploaded
Free age calculator
Enter a birth date and an as-of date. The age is whole years, then whole months, then the remaining days. This is a calendar count, not a legal age. The dates stay in your browser.
Enter a birth date.
How the age is counted
- Age is whole years, then whole months, then the remaining days. January 15, 2000 to November 4, 2026 is 26 years, 9 months, and 20 days.
- Days old is the as-of date minus the birth date. That span is 9,790 days. The birth date itself is 0 days.
- The next birthday is the next anniversary. On November 4, 2026, the next birthday for January 15 is January 15, 2027, in 72 days.
- In a year with no February 29, a February 29 birthday has its anniversary on February 28. February 29, 2000 to February 28, 2025 is 25 years, 0 months, and 0 days.
- If the day does not exist in the anniversary month, the anniversary is the last day of that month. January 31 to February 28, 2021 is 1 month and 0 days.
- Dates can be from 1600 through 2400. The as-of date starts as today, and it can be another date. It cannot be before the birth date.
This is a calendar count. It is not a legal age, and it does not look up a record.
Questions about this calculator
How is age counted?
Age is whole years, then whole months, then the remaining days. This is the same calendar count as the days between dates tool. January 15, 2000 to November 4, 2026 is 26 years, 9 months, and 20 days, which is 9,790 days.
What if the birthday is February 29?
In a year with no February 29, the anniversary is February 28. February 29, 2000 to February 28, 2025 is 25 years, 0 months, and 0 days.
When is the next birthday?
The next anniversary after the as-of date. For a birth date of January 15, 2000 and an as-of date of November 4, 2026, the next birthday is January 15, 2027, in 72 days.
Does this tool upload the dates?
No. The dates stay in the browser. Blogoose does not receive them.