Age Calculator
Pick a date of birth below to see the exact age and how many days remain until the next birthday.
What this tool does
The age calculator takes a date of birth and instantly works out the exact age in years, months, and days as of today, along with the number of days remaining until the next birthday and the total number of days lived so far. Everything is calculated locally in your browser the moment you pick a date — no submit button, no server round-trip.
Example use case
Parents tracking a child's precise age for a school enrollment form, HR staff verifying an applicant meets a minimum age requirement, or anyone curious how many days old they are can get an answer immediately. The days-until-birthday figure is handy for planning celebrations or reminders in advance.
How the calculation works
Age is calculated using full calendar years, months, and remaining days rather than a rough estimate, so it accounts correctly for varying month lengths and leap years. If today's date falls before this year's birthday, the tool automatically counts down to next year's birthday instead.