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kibibytes, mebibytes and gibibytes

Just as kilo stands for 1000, kibi stands for 1024. The same reasoning goes for mebi and gibi.
1 kibibyte = 1 KiB = 1024 bytes
1 mebibyte = 1 MiB = 1024 kibibytes = 1'048'576 bytes
1 gibibyte = 1 GiB = 1024 mebibytes = 1'073'741'824 bytes
This wonderful quote was found in man resize2fs:
Note: when kilobytes is used […], I mean real, power-of-2 kilobytes, (i.e., 1024 bytes), which some politically correct folks insist should be the stupid-sounding «kibibytes». The same holds true for megabytes, also sometimes known as «mebibytes», or gigabytes, as the amazingly silly «gibibytes». Makes you want to gibber, doesn't it?

Misc

One zettabyte = 1021

See also

Prefixes for Data Units
Data amount

Index