Age Calculator
Online age calculator for exact age by birth date and time, with total days, next birthday countdown, and target-age date estimation for records and verification.
Birth Information
Select a birth date to view complete results
Age Calculation Guide
This age calculator gives precise age results from birth date and time, then shows birthday countdown, milestones, zodiac sign, and target-age dates.
Calculation Method
- Uses Gregorian calendar logic with leap-year and month-length handling.
- Applies hour/minute/second carry and borrow instead of date-only estimation.
- Leap-day birthdays are counted as Feb 28 in non-leap years for countdown.
- All calculations run locally in your browser using current system time.
Fun Facts
- Average human life expectancy is around 72 years globally.
- People aged 100 or above are often called centenarians.
- Leap-year rule: every 4 years, except centuries not divisible by 400.
- Target-age dates are useful for long-term planning and milestones.
Your birth data never leaves the browser; no server upload is required.