The gigabyte is a multiple of the unit byte for digital information.
The term gigabyte is commonly used to mean either 10003 bytes or 10243 bytes. The latter binary usage originated as compromise technical jargon for byte multiples that needed to be expressed in a power of 2 but lacked a convenient name. As 1024 (210) is approximately 1000 (103), roughly corresponding to SI multiples, it was used for binary multiples as well.
| Simbol | Value | Simbol | Value |
|---|---|---|---|
| kilobyte (kB) | 103 | kibibyte (KiB) | 210 = 1.024 × 103 |
| megabyte (MB) | 106 | mebibyte (MiB) | 220 ≈ 1.049 × 106 |
| gigabyte (GB) | 109 | gibibyte (GiB) | 230 ≈ 1.074 × 109 |
| terabyte (TB) | 1012 | tebibyte (TiB) | 240 ≈ 1.100 × 1012 |
| petabyte (PB) | 1015 | pebibyte (PiB) | 250 ≈ 1.126 × 1015 |
| exabyte (EB) | 1018 | exbibyte (EiB) | 260 ≈ 1.153 × 1018 |
| zettabyte (ZB) | 1021 | zebibyte (ZiB) | 270 ≈ 1.181 × 1021 |
| yottabyte (YB) | 1024 | yobibyte (YiB) | 280 ≈ 1.209 × 1024 |
