Why does folder properties give the wrong size?

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I have a folder (actually many) that give the wrong size in MB. Right clicking on a folder and selecting properties pops up a dialog that has the size listed as 11.5MB (12,163,992 bytes). Last I checked 12,163,992 bytes = 11.6MB. Why does windows report an inconsistent size.

I'm trying to understand what method windows uses that could give 11.5.
Thanks.

Posted 6-Aug-10 10:48am

Karl 2000

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AspDotNetDev · Answer 1 · 2010-08-06T11:30:00

Solution 1

Perhaps they do this:

TruncateToOneDecimal(TruncateToInt(12163992 / 1024) / 1024)

That gives 11.5. Or maybe they just truncate to the nearest 0.5 rather than the nearest 0.1.

Posted 6-Aug-10 11:30am

AspDotNetDev