GClocks

Age Calculator

Exact age from any date of birth - years, months, and days, plus a life timeline, birthday countdown, and totals down to the second.

Live

0 years
0 months
0 days

Of the way to your next birthday

Life timeline

  1. Birth
  2. Today
  3. Next birthday
  4. Age 100

Next milestone

Open Countdown

Live birthday countdown

Open Countdown
Age in years0
Age in months0
Age in weeks0
Age in days0
Age in hours0
Age in minutes0
Age in seconds0

Age calculator

Exact age & birthday countdown

Find how old you are in years, months, weeks, days, hours, minutes, and seconds - see your life timeline from birth to age 100, and how many days remain until your next birthday. Free, no sign-up.

How it works

  1. Enter date of birth

    Pick the birth date. Use Today only if you need a same-day check.

  2. Set the reference date

    Defaults to today. Change it to see age on a past or future date.

  3. Read the live result

    Age updates as you type - calendar breakdown, life timeline, birthday countdown, and totals in every unit.

Why use this age calculator?

Handy for forms, visas, school cut-offs, sports categories, and milestones - without counting leap years by hand. The life timeline shows birth, today, next birthday, and the date you turn 100.

What you get

  • Live age + year ring

    See exact Y/M/D and how far you are through the year to your next birthday.

  • Life timeline

    Birth, today, next birthday, and age 100 on one clear timeline.

  • Birthday countdown

    Days left until the next birthday - open it as a live Countdown in one tap.

  • Next milestone

    Turning 30, 40, 50… with days remaining and a Countdown link.

  • Born-on weekday

    Know the weekday you were born and the weekday of your next birthday.

  • Hours to seconds

    Total time alive in weeks, days, hours, minutes, and seconds.

Frequently asked questions

Yes. It is free to use in the browser with no account required.

Yes. Month lengths and leap days are included in the day count. February 29 birthdays use February 28 in non-leap years for the next birthday.

Yes. Change the Current date field to any reference day.

Birth, the reference date (today by default), your next birthday, and the calendar date you turn 100.

It is total days lived divided by 365.25, shown to two decimals - useful for a continuous age, not the calendar Y/M/D breakdown.

No. Calculation runs only in your browser and is not sent to a server.

Yes. Use Open Countdown under the birthday or milestone cards to jump to the Countdown tool with the date prefilled.

Yes. Enter any date of birth and reference date.