๐ Age Calculator
Calculate exact age in years, months and days free. Works for any date range, handles leap years correctly. Instant.
๐ Age Calculator
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About the Age Calculator Tool
Calculating exact age sounds trivial until you try it. Months have different lengths, leap years add a day irregularly, and the answer depends on whether you count calendar months or elapsed days. Doing it mentally past the year figure is genuinely error-prone.
This calculator gives the precise breakdown in years, months, and days between any two dates, handling leap years and varying month lengths correctly. It runs entirely in your browser.
How to Use Age Calculator
- Enter the date of birth or start date.
- Enter the target date, or leave it as today.
- The exact age is calculated immediately.
- Read the result in years, months, and days.
When to Use This Tool
- Determining exact age for a form, application, or eligibility check
- Calculating age at a specific past or future date
- Working out the precise duration between two events
- Checking age eligibility for a scheme or examination
- Calculating length of service or membership duration
Things Worth Knowing
- Leap years are handled correctly, including the century rule where 1900 was not a leap year but 2000 was.
- Month lengths vary, so the day component depends on the specific months spanned.
- Ages are calculated in local time and do not account for timezone differences between locations.
Quick Facts
| Tool name | Age Calculator |
| Category | Utilities |
| Price | Free โ no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None โ your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
How is exact age calculated?
By counting complete years first, then complete months from the last birthday, then remaining days. This matches how age is conventionally stated and handles varying month lengths correctly.
How are leap years handled?
A leap year occurs every four years, except century years not divisible by 400. So 1900 was not a leap year but 2000 was. The calculation accounts for this correctly.
What happens with a 29 February birthday?
Conventions differ. Most jurisdictions treat 1 March as the birthday in non-leap years for legal purposes, though some use 28 February. The calculation reflects elapsed time rather than any particular legal convention.
Can I calculate age at a future date?
Yes. Enter any target date rather than today to find what the age will be โ useful for checking eligibility cut-offs.