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How many seconds old are you?

October 13, 2013

A bit of fun this time round… I’ve made a spreadsheet to let you see your important age anniversaries in months, weeks, days, hours, minutes and seconds. When will you be (or when were you?!) one billion seconds old, or half a million hours old (a milestone I reached last year), or 2000 weeks old, or…? (See http://xkcd.com/1000/ for another view on special anniversaries.)

Here is an example display, with explanations below.

Click on Ages.xlsx (or the example image) to download.

Example display of Ages spreadsheet.

See the Instructions tab for details on how to use it, or just play.
To change a cell value, just click on it, then enter the new value.

I’ve tried to make it reasonably bullet-proof.
You cannot change anything unless it’s OK to do so.
Each editable cell has more or less sensible limits.

If you want to see how it all works, see the Instructions tab for how to unlock the spreadsheet.

There is also (more or less) an online version of this here.

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