Age Calculator
Your exact age in years, months, and days.
Runs entirely in your browser — nothing you enter is uploaded or sent to a server.
Ages use real calendar months and leap years; if you need an official or legal age, which can follow specific cut-off rules, confirm it against the relevant authority. Read our full disclaimer.
About this tool
Enter a date of birth and this tool works out the exact age in years, months, and days — as of today, or any date you choose — along with the totals: how many days, weeks, and months have passed. It's handy for filling in forms, checking an eligibility cut-off, counting down to a birthday, or just settling how old someone is to the day. It uses real calendar month lengths and leap-year rules, so the figure is accurate rather than an approximation, and it all runs in your browser.
Try it
Born 15 June 1990, on 15 June 2020 you are exactly 30 years, 0 months, 0 days old.
How to use
- 1Enter the date of birth.
- 2Optionally change the 'age at' date (defaults to today).
- 3Read the exact age and the total number of days.
Features
- Exact years / months / days breakdown.
- Age as of today or any chosen date.
- Correct leap-year and month-length handling.
Frequently asked questions
How do I calculate age from a date of birth?
Enter the date of birth and the tool subtracts it from today (or a date you pick), giving the exact years, months, and days between them — counted the way you'd count a birthday, not rounded to a decimal.
How do I find my age on a specific or future date?
Change the 'age at' date from today to any date, past or future. That's useful for checking how old you'll be on an event day, or your age as of a form's cut-off date.
How many days old am I?
Alongside the years/months/days breakdown, it shows the total days lived — plus weeks and months — so you can spot a milestone like turning 10,000 days old.
Does it account for leap years?
Yes. It uses real calendar month lengths and leap-year rules — including that 2000 is a leap year but 1900 isn't — so someone born on 29 February gets an accurate count.
Is this the same as a legal age?
Usually, but not always — some official or legal ages follow specific cut-off or rounding rules (school entry, certain benefits). This gives the true calendar age; confirm anything legal against the relevant authority.
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