Age Calculator

Find an exact age in years, months, days, hours, minutes, and seconds, plus a countdown to the next birthday.

100% private. Your files never leave your device.

Date of birth

Age as of

Years

Months

Days

Hours

Minutes

Seconds

233,757

Hours lived

14,025,457

Minutes lived

841,527,435

Seconds lived

These numbers update every second.

Total

9,739 days (1,391 weeks)

Next birthday

123 days (Friday)

About this tool

Enter a date of birth and get an exact age broken down into years, months, and days, plus hours, minutes, and seconds lived, along with the total in days and weeks and how long until the next birthday. When you leave "as of" on today, the clock ticks every second. You can also change the "as of" date to work out an age on any day in the past or future, which is handy for forms that ask for your age on a specific date, for school enrollment cutoffs, or for checking eligibility rules. The math runs instantly in your browser and handles leap years correctly. Nothing you enter is stored or sent anywhere.

How to use

1Pick the date of birth using the first date field.
2Leave the "as of" date on today, or change it to calculate the age on another day.
3Read the exact age in years, months, and days, plus hours, minutes, and seconds lived, and the next birthday countdown.
4Change either date at any time. The results update instantly, and today's view ticks every second.

Frequently asked questions

How is the age calculated?

The calculator counts full years first, then full months, then the remaining days, the same way ages are stated on official forms. Leap years and month lengths are handled correctly.

Can I calculate an age on a date other than today?

Yes. Set the "as of" date to any day you like, past or future, and the age is computed for that day.

What does the next birthday countdown show?

It shows how many days remain until the person's next birthday and which weekday it falls on.

Is my date of birth stored?

No. The calculation happens in your browser's memory and everything disappears when you close the page.

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