Age Calculator
Your exact age today
Input
Result
Everything is calculated in your browser. The dates you type are never sent to a server.
How to use
Enter a date of birth to get the exact age in completed years, plus how many days remain until the next birthday. The age increases on the birthday itself and counts only full years. Dates are never uploaded.
When to use it
- Filling in an age on a form, correctly.
- Checking eligibility where there is an age limit.
- Seeing how long until the next birthday.
How to use it
- Pick the date of birth.
- The reference date defaults to today; change it for an age as of another date.
- The age and the days to the next birthday appear at once.
Good to know
- The rule: a year is added on the birthday itself, and only completed years are counted.
- For someone born on 29 February, the birthday is treated as 28 February in common years.
- Changing the reference date gives the age as of that day — useful for a start date or an exam date.
- Everything is calculated inside your browser.
Frequently asked questions
What about counting-style ages used in some countries?
This tool gives the completed-years age only, which is what official forms ask for in Korea since 2023. A traditional counting age has to be worked out separately.
How old am I on my birthday itself?
The age goes up that day. Born on 10 May 2000, you turn 25 on 10 May 2025.
What happens with a 29 February birthday?
In common years it is treated as 28 February, and the screen says so. Some institutions use 1 March instead, so check their rule for anything official.
Can I see months as well?
The date difference tool breaks a span into years, months and days — handier for counting a baby's age in months.