Age Calculator
Find your exact age in years, months, and days — plus total time lived and a countdown to your next birthday.
Your age, down to the day
"How old am I, exactly?" sounds like a simple question until you try to answer it precisely. Calendar math is trickier than it looks: months have different lengths, leap years add an extra day every four years, and borrowing days across month boundaries is easy to get wrong by hand. Utilo's free age calculator does the calendar arithmetic for you — enter your date of birth and get your age expressed in years, months, and days, the same way you'd count it on a wall calendar.
Beyond the headline number, you'll see your age broken into total months, weeks, days, and approximate hours — handy for milestone birthdays, insurance forms, school enrollment cutoffs, and retirement planning. You'll also learn which weekday you were born on and get a live countdown to your next birthday. Like every Utilo tool, it runs entirely in your browser: your birth date never leaves your device, there is no account to create, and there is nothing to install.
How to use the age calculator
- Enter your birth date: pick the date from the calendar picker (or type it in).
- Hit Calculate: your exact age appears instantly, with totals underneath.
- Check the extras: see your birth weekday and how many days until your next birthday.
Frequently asked questions
How is age calculated in years, months, and days?
We subtract your birth date from today's date, borrowing months and days exactly the way you'd count on a calendar. Leap years are handled automatically because the math uses real calendar months.
Does the age calculator use my timezone?
It uses your device's local date, so your age is computed for where you are right now. Nothing is sent to a server.
Why does my age differ by one day on some calculators?
Most differences come from timezones or from whether the birth day itself is counted. This calculator uses calendar dates only — no times — so the result matches counting on a wall calendar.
Is my date of birth stored anywhere?
No. Your birth date is processed entirely in your browser and never uploaded, logged, or stored. Close the tab and it's gone.