| Multiples of bits | ||||
|---|---|---|---|---|
| SI decimal prefixes | IEC binary prefixes | |||
| Name (Symbol) |
Value | Name (Symbol) |
Value | |
| kilobit (kbit) | 103 | kibibit (Kibit) | 210 = 1.024 × 103 | |
| megabit (Mbit) | 106 | mebibit (Mibit) | 220 ≈ 1.049 × 106 | |
| gigabit (Gbit) | 109 | gibibit (Gibit) | 230 ≈ 1.074 × 109 | |
| terabit (Tbit) | 1012 | tebibit (Tibit) | 240 ≈ 1.100 × 1012 | |
| petabit (Pbit) | 1015 | pebibit (Pibit) | 250 ≈ 1.126 × 1015 | |
| exabit (Ebit) | 1018 | exbibit (Eibit) | 260 ≈ 1.153 × 1018 | |
| zettabit (Zbit) | 1021 | zebibit (Zibit) | 270 ≈ 1.181 × 1021 | |
| yottabit (Ybit) | 1024 | yobibit (Yibit) | 280 ≈ 1.209 × 1024 | |
| See also: Nibble · Byte · Multiples of bytes Orders of magnitude of data |
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The gigabit is a multiple of the unit bit for digital information or computer storage. The prefix giga (symbol G) is defined in the International System of Units (SI) as a multiplier of 109 (1 billion, short scale),[1] and therefore
The gigabit has the unit symbol Gbit or Gb.
Using the common byte size of 8 bits, 1 Gbit is equal to 125 megabytes (MB) or approximately 119 mebibytes (MiB).
The gigabit is closely related to the gibibit, a unit multiple derived from the binary prefix gibi (symbol Gi) of the same order of magnitude,[2] which is equal to 230bits = 1073741824bits, or approximately 7% larger than the gigabit.