The mebibyte is a multiple of the unit byte for digital
information.[1] The binary prefix mebi means 220, therefore one
mebibyte is equal to 1048576bytes = 1024 kibibytes. The unit symbol
for the mebibyte is MiB. Technically a megabyte (MB) is a power of
ten, while a mebibyte (MiB) is a power of two, appropriate for binary
machines.
The unit was established by the International Electrotechnical
Commission (IEC) in 1998.[2] It was designed to replace the megabyte
when used in the binary sense to mean 220 bytes, which conflicts with
the definition of the prefix mega in the International System of Units
(SI) as a multiplier of 106.
The binary prefixes have been accepted by all major standards
organizations and are part of the International System of
Quantities.[3] Many
v t e Multiples of bytes Decimal Value Metric 1000 kB kilobyte 10002 MB megabyte 10003 GB gigabyte 10004 TB terabyte 10005 PB petabyte 10006 EB exabyte 10007 ZB zettabyte 10008 YB yottabyte Binary Value IEC JEDEC 1024 KiB kibibyte KB kilobyte 10242 MiB mebibyte MB megabyte 10243 GiB gibibyte GB gigabyte 10244 TiB tebibyte – 10245 PiB pebibyte – 10246 EiB exbibyte – 10247 ZiB zebibyte – 10248 YiB yobibyte – Orders of magnitude of data Contents 1 Definition 2 History and usage 3 See also 4 References Definition[edit] 1 MiB = 220 bytes = 1024 kibibytes = 1048576bytes The prefix mebi is a binary prefix derived from the words mega and
binary, indicating its origin in the closeness in value to the SI
prefix mega. One mebibyte (MiB) is 220, i.e. 1024 × 1024 bytes,[8] or
1048576bytes.
Despite its official status, the unit mebibyte is not commonly used
even when reporting byte counts calculated in binary multiples, but is
often represented as megabytes. Formally, one megabyte denotes 1000 ×
1000 bytes. The discrepancy may cause confusion, since operating
systems using the binary method report lower numerical values for
storage size than advertised by manufacturers, such as disk drive
manufacturers who strictly use decimal units.
History and usage[edit]
The binary prefixes, including mebi, were defined by the International
Electrotechnical Commission (IEC) in December 1998. All major
standards bodies have endorsed the use of them for binary multiples.
The mebibyte is closely related to the megabyte. The latter term is
often used as a synonym for mebibyte, but it formally refers to 1000
kilobytes, or 1,000,000 bytes. The binary prefix mebi, which is a
factor of 220, was created to provide an unambiguous unit that is
distinct from the metric
IEEE 1541 Orders of magnitude (data) References[edit] ^
v t e Units of information Base unit bit Platform-dependent units nibble byte syllable parcel word Platform-independent units unibit (1) dibit (2) tribit (3) quadbit (4) quartet (4) sextet (6) octet (8) hextet (16) declet (10) doublet (16) quadlet (32) octlet (64) hexlet (128) triad (3) tetrad (4) pentad (5) hexad (6) heptad (7) octad (8) slab (12) catena (24) Traditional bit units kilobit megabit gigabit terabit petabit exabit zettabit yottabit Traditional byte units kilobyte megabyte gigabyte terabyte petabyte exabyte zettabyte yottabyte IEC bit units kibibit mebibit gibibit tebibit pebibit exbibit zebibit yobibit IEC byte units kibibyte mebibyte gibibyte tebibyte pebibyte exbibyte zebib |