Find out exactly how old someone is — in years, months and days — plus total days lived and the countdown to the next birthday.
Age Calculator
Used for forms, eligibility checks, school enrolment and plain curiosity.
Leave the second date as today, or pick any past/future date — for example a school cut-off date.
How exact age is calculated
Exact age is counted in full years, then full months, then remaining days, borrowing days from the previous month when needed — the same method used on official forms. That is why “age in days” and “age in years” can look slightly inconsistent with a simple 365-day shortcut: leap years add real days, and this calculator counts them.
Frequently asked questions
How do I find my age on a specific future date?
Enter your date of birth, then set the second date to that future date — for example the first day of a school year or a licence eligibility date — and calculate.
How many days old am I?
The result shows your total days lived, counted exactly including leap days, plus totals in weeks, months and hours.
When is my next birthday?
The countdown line shows the exact date of your next birthday and how many days away it is from the date you selected.