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Age Calculator

Work out exact age in years, months and days, plus the days until the next birthday.

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This tool runs in your browser. Nothing is uploaded.

About Age Calculator

Age Calculator counts calendar years, then whole months, then remaining days between a date of birth and any date you choose, the way age is normally stated on forms.

For application forms, school admissions, insurance quotes and settling family debates.

What it does

  • Years, months and days
  • Total months, weeks and days lived
  • Countdown to the next birthday
  • Leap-day birthdays handled

How to use Age Calculator

  1. Enter the date of birth.
  2. Change the "age on" date if you need age at a past or future date.
  3. Read the result instantly.

Frequently asked questions

How are people born on 29 February handled?

In non-leap years the birthday is treated as 28 February for the countdown, which is the common convention. Your local legal rule may differ.

Why can months and days look uneven?

Months have different lengths, so days are counted from the last full month anniversary.

Limits and privacy

Uses the Gregorian calendar in your local time zone.

Everything happens on your device, so your content never reaches our server.

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