The kibibit is a multiple of the bit

Bit

A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...

, a unit of digital information storage, prefixed by the standards-based multiplier kibi (symbol Ki), a binary prefix

Binary prefix

In computing, a binary prefix is a specifier or mnemonic that is prepended to the units of digital information, the bit and the byte, to indicate multiplication by a power of 2...

 meaning 2¹⁰. The unit symbol of the kibibit is Kibit or Kib.

1 kibibit = 2¹⁰ bit

Bit

A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...

s = 1024 bits

The kibibit has existed since 1998 and is closely related to the kilobit

Kilobit

The kilobit is a multiple of the unit bit for digital information or computer storage. The prefix kilo is defined in the International System of Units as a multiplier of 103 , and therefore,...

, which is either a synonym for kibibit, or stands for 10³ bits = 1000 bits, according to the International System of Units

International System of Units

The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. The older metric system included several groups of units...

 (SI).

The binary prefixes are not part of the International System of Units

International System of Units

The International System of Units is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. The older metric system included several groups of units...

(SI).