Age calculator
Find an exact age in years, months and days from a date of birth, plus total days lived and days to the next birthday.
Runs in your browser. Nothing you enter is uploaded.
What it does
Enter a date of birth to get the exact age in years, months and days. You can also ask for the age on any other date, for example on a school admission cut-off date or on the day of an event.
How to use it
- Pick the date of birth.
- Leave the second date as today, or pick the date you want the age on.
- Read the age, the total number of days, and the days until the next birthday.
Worked example
Someone born on 15 August 2000 is, on 14 November 2026, 26 years, 2 months and 30 days old. Their next birthday is 274 days away.
How it works
The calculator counts whole years from the date of birth, then whole months, then the days left over, using the real length of each month. Total days is the plain difference between the two dates. Dates are treated as calendar dates, so time zones and time of day do not affect the answer.
Questions
How are 29 February birthdays handled?
In a year that is not a leap year, this tool counts the birthday on 28 February.
Why do other calculators differ by a day?
Months have different lengths, and tools differ on how they count the left-over days. This one counts completed years, then completed months, then days.
Is my date of birth sent anywhere?
No. The calculation runs in your browser and nothing is uploaded or stored.