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How to write kilobyte and megabyte


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Hi all


There have for a long time been confusion about how to write kB - MB and so on, but they now try to sort it by using these designations.


kilobyte (kB) 10^3 =1000; 2^10 = 1024 kibibyte (KiB) 2^10

megabyte (MB) 10^6 =1000000; 2^20 = 1048576 mebibyte (MiB) 2^20

gigabyte (GB) 10^9 =1000000000; 2^30 = 1073741824 gibibyte (GiB) 2^30 (and so on)

terabyte (TB) 10^12; 2^40 tebibyte (TiB) 2^40

petabyte (PB) 10^15; 2^50 pebibyte (PiB) 2^50

exabyte (EB) 10^18; 2^60 exbibyte (EiB) 2^60

zettabyte (ZB) 10^21; 2^70 zebibyte (ZiB) 2^70

yottabyte (YB) 10^24; 2^80 yobibyte (YiB) 2^80


I expect there will still be some confusion for a long time to come.

Fundamentally byte refers to the binary system. To my mind there was a possibility to distinguish between numbers and bytes by calling the first bit and the second byte. Not perfect perhaps?




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Hi gavind

As I understood it it meant that KB or rather kB meant kilobyte and was by many especially advertising often used to describe the number 10^3 = 1000 to overcome the difficulty they had inserted the small " i " to get KiB which should then mean 2^10 = 1024 and so on.

For example if you have a harddisk that the selling/advertising salesman call a 60 GB hardisk (meaning 60 x 10^9) chances are that the real amount of bytes in that harddisk is 55.879 GB (US notation)




Thanks, I still think a calculator would work best here. icon_smile.gif


Anyways, KB is kilobyte and KiB is Kilobit?

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