|Multiples of bytes|
|Orders of magnitude of data|
The gibibyte is a multiple of the unit byte for digital information. The binary prefix gibi means 230, therefore one gibibyte is equal to 1073741824bytes = 1024 mebibytes. The unit symbol for the gibibyte is GiB. It is a member of the set of units with binary prefixes defined by the International Electrotechnical Commission (IEC).
The gibibyte is very closely related to the gigabyte (GB). The GB is defined by the IEC as 109 bytes = 1000000000bytes, 1GiB ≈ 1.074GB. 1024 gibibytes are equal to one tebibyte. In the context of computer memory, Gigabyte and GB are customarily used to mean 10243 (230) bytes, although not in the context of data transmission and not necessarily in the context of hard drive size. The word gibibyte was coined in 1998.
This unit can be used for measuring computer, smartphone and tablet RAM; it first entered widespread use in the era of GB- to TB-capacity hard drives, amid consumer confusion over the advertisements for these products. (A one-terabyte drive has a capacity of only about 90% of a tebibyte.)
- "Prefixes for binary multiples". NIST. 2007. Retrieved 10 August 2007.
- "Gigabyte, usage note". American Heritage Dictionary. Retrieved 25 January 2016.
- International Electrotechnical Commission (January 1999), IEC 60027-2 Amendment 2: Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics.
- "IEC 80000-13:2008". International Organization for Standardization. Retrieved 21 July 2013.