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Age Calculator – Exact Age in Years, Months, Days & Next Birthday (Free Online)

Age Calculator – Exact Years, Months, Days & Next Birthday

Use this free Age Calculator to find your exact age in years, months, and days. See your next birthday countdown, the weekday you were born, your zodiac sign, and the total time lived in days, hours, and minutes. Everything runs in your browser—no data saved.

Age Calculator

Defaults to today if empty

How This Age Calculator Works

  • Exact age (Y/M/D) uses real calendar rules (variable month lengths and leap years).
  • Next birthday adjusts correctly for leap-day birthdays on non-leap years.
  • Time lived shows total days, hours, and minutes between DOB and the as-of date.
  • Zodiac sign determined from Western (tropical) date ranges.

FAQ – Age Calculator

Why do months and days vary?

Months have different lengths (28–31 days). The tool uses each month’s actual length for exact results.

How are leap years handled?

Leap years follow the Gregorian rules (every 4 years, except centuries not divisible by 400). Feb 29 birthdays advance to Mar 1 in non-leap years for countdown.

Can I calculate age at a past or future date?

Yes. Set any “As of” date to get the exact age breakdown at that point in time.

Is my information stored?

No. Everything runs locally in your browser; nothing is uploaded or saved.

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