Age Calculator
Free age calculator: find your exact age in years, months and days, total weeks, days and hours, plus a countdown to your next birthday. Private and instant.
- No upload — 100% private
- Instant, on your device
- Free, no sign-up
- Works offline once loaded
How it works
How to use Age Calculator
Pick your date of birth.
Optionally choose another date to find the age on that day — leave it empty for today.
Read your exact age in years, months and days.
See totals in months, weeks, days and hours and the countdown to your next birthday.
Why use it
Why use our Age Calculator tool
Calendar-exact
Counts real month lengths and leap years, so the result matches how people actually measure age.
Leap-day aware
Born on 29 February? Birthdays fall on 28 February in common years, and the countdown handles it.
Totals at a glance
Your age in months, weeks (plus leftover days), days and hours.
Birthday countdown
Days until your next birthday, the weekday it lands on and the age you'll turn.
Age on any date
Work out how old someone was — or will be — on a specific day.
FAQ
Frequently asked questions
How is exact age calculated?
We count whole months from your birth date, then the remaining days. Each month is measured from the original birth day, so someone born on 31 January turns one month old on the last day of February.
How are leap-day birthdays handled?
If you were born on 29 February, your birthday is treated as 28 February in years without a leap day. Some countries legally use 1 March instead; the difference is one day.
Does the calculator use my time zone?
Today's date comes from your device's local calendar. Ages are calculated from calendar dates only, so daylight-saving changes never shift the result.
Can I calculate age at a future date?
Yes. Set the optional “age at” date to any day after the birth date — handy for eligibility rules, school entry or retirement planning.
Why is the hours total a whole number of days?
Without a birth time we count from midnight to midnight, so total hours are total days × 24.
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