Date & Time
Age Calculator
Calculate exact age in years, months, and days from a birth date — leap-year aware.
- Mobile Friendly
- Accessibility Tested
- Formula Verified
- SEO Optimized
- Fast Loading
- Responsive
Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide guide
Introduction
The age calculator finds exact years, months, and days from a birth date to today. It accounts for month lengths and leap years.
Formula
Age is the calendar difference between today and the birth date, expressed in years, months, and days (leap years included).
- today — Current local calendar date
- birth date — Date of birth
Step-by-step
- Enter birth year, month, and day.
- Compare with today’s local date.
- Borrow months/days when needed for an exact calendar age.
Worked example
Someone born on 1 January 2000 is a whole number of years old on each 1 January thereafter, with extra months and days accumulating between birthdays.
Use cases
- Find exact age for forms and applications
- Calculate days lived
- Verify age eligibility cutoffs
Frequently asked questions
Does this use my timezone?
The calculation uses your device’s local calendar date. Set your mySutra locale timezone preference for consistent regional formatting elsewhere on the site.
Are leap years handled?
Yes. February 29 and month lengths are resolved via the JavaScript calendar, which includes leap years.
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