Binary prefixes table
Binary prefixes - kibi, mebi, gibi, tebi etc.

Binary prefixes#

NameSymbolFactorDifference to SI analogueSI analogue nameSI analogue symbolSI analogue factor
kebiKi1024 = 102412.40%kilok1000 = 10001
mebiMi1 048 576 = 102424.86%megaM1000 000 = 10002
gibiGi1 073 741 824 = 102437.37%gigaG1000 000 000 = 10003
tebiTi1 099 511 627 776 = 102449.95%teraT1000 000 000 000 = 10004
pebiPi1 125 899 906 842 624 = 1024512.59%petaP1000 000 000 000 000 = 10005
exbiEi1 152 921 504 606 846 980 = 1024615.29%exaE1000 000 000 000 000 000 = 10006
zebiZi1 180 591 620 717 411 300 000 = 1024718.06%zettaZ1000 000 000 000 000 000 000 = 10007
yobiYi1 208 925 819 614 629 180 000 000 = 1024820.89%yottaY1000 000 000 000 000 000 000 000 = 10008

Some facts#

  • Binary prefixes system is an anolog to metric prefixes (SI), adjusted for the needs of computer science. Binary prefixes differ from related metric prefixes in the following ways:
    • There are no fractional (eg. mili, micro, nano, pico) prefixes, because those have no application in computer science. Smallest piece of information is one bit, which is indivisible.
    • Usage of binary base (number 1024 and its powers), instead of metric one (number 10 and its powers)
  • Despite the existence of binary prefixes, many people still use related SI prefixes, while they're thinking about binary ones. For example someone can say kilo-byte (SI prefix - kilo meaning 1000) bearing in mind 1024 bytes (which is really kebi-byte). Because people are rather reluctant to use new prefixes (kebi, mebi etc.), sometimes binary prefixes are called "death law".

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