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

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

Age in Weeks Calculator

Using the Age in Weeks 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 Weeks Since Birthday'. You'll see two outputs:

  • Weeks Old: A long, spelled out sentence telling you how many weeks a person born on the input birthday has been alive.
  • Weeks Old (Clean): Just the number of weeks 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 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 lives in New Hampshire with his wife, kids, and dog.

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