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Age in Days Calculator: How Old Are You in Days?

Written by:
PK

On this page is an age in days calculator. Enter your birthday and we'll tell you how many days you've been alive.

Age in Days Calculator

Using the Age in Days Calculator

To use the days until now tool, just enter two inputs:

  • Birthday (in Current Timezone): Enter the date you – or someone else – were born (adjusting for the current timezone, if necessary)

Next, hit 'Calculate Days Since Birthday'. You'll see two outputs:

  • Days Old: A long, spelled out sentence telling you how many days a person born on the input birthday has been alive.
  • Days Old (Clean): Just the number of days without any sentence.

(And don't worry, the tool does factor in leap years.)

Date, Age, and Time Calculators. Plus Others!

Want to be different and not say an age in years? Use one of the other birthday tools:

Also, see our other calculators – a page which includes many other time tools.

      

PK

PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools.

PK is in his mid-30s and works and lives in the Bay Area with his wife, two kids, and dog.

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