Gibibit (Gibit)

ComputingCurrent unit

Exactly 1,073,741,824 bits.

1 gibibit = 134,217,728 bytes (exactly).

1 gibibit = 134,217,728 bytes

About the gibibit

Equal to 2^30 bits, or 1,073,741,824 bits, the gibibit (Gibit) is the unit behind many memory chip densities. Dividing by eight gives 134,217,728 bytes, which is 128 mebibytes. The gibi prefix, from the first two letters of giga plus bi, was among the first three binary prefixes the IEC approved in December 1998.

Its decimal cousin, the gigabit, is 10^9 bits, so a gibibit is about 7.4 percent larger. That gap is why a quantity described in gigabits and the same quantity in binary units can differ noticeably when the two conventions are mixed. Telecom speeds are quoted in decimal gigabits per second, while the gibi names exist so that a binary count can be stated without ambiguity.

The symbol Gibit is a bit count; the byte equivalent, with capital B, is the gibibyte, GiB, which is eight times larger.

Sources: Wikipedia: Binary prefix; NIST: Prefixes for binary multiples; Wikipedia: Bit

Gibibit conversion chart

1 gibibit expressed in every other digital storage unit:

Unit1 gibibit
Bytes134,217,728
Kilobytes134,217.728
Megabytes134.217728
Gigabytes0.134217728
Terabytes0.000134217728
Bits1,073,741,824
Petabytes1.34217728×10⁻⁷
Kibibytes131,072
Mebibytes128
Gibibytes0.125
Tebibytes0.0001220703125
Kilobits1,073,741.824
Megabits1,073.741824
Gigabits1.073741824
Exabytes1.34217728×10⁻¹⁰
Zettabytes1.34217728×10⁻¹³
Yottabytes1.34217728×10⁻¹⁶
Pebibytes1.192092896×10⁻⁷
Exbibytes1.164153218×10⁻¹⁰
Terabits0.001073741824
Kibibits1,048,576
Mebibits1,024
Nibbles268,435,456

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