Yottabyte
| Multiples of bytesas defined by IEC 60027-2 | ||||||
|---|---|---|---|---|---|---|
| SI prefix | Binary prefixes | |||||
| Name | Symbol | Multiple | Name | Symbol | Multiple | |
| Kilobyte | kB | 103 | Kibibyte | KiB (or KB) | 210 | |
| Megabyte | MB | 106 (or 220) | Mebibyte | MiB | 220 | |
| Gigabyte | GB | 109 (or 230) | Gibibyte | GiB | 230 | |
| Terabyte | TB | 1012 (or 240) | Tebibyte | TiB | 240 | |
| Petabyte | PB | 1015 (or 250) | Pebibyte | PiB | 250 | |
| Exabyte | EB | 1018 (or 260) | Exbibyte | EiB | 260 | |
| Zettabyte | ZB | 1021 (or 270) | zebibyte | ZiB | 270 | |
| yottabyte | YB | 1024 (or 280) | yobibyte | YiB | 280 | |
A yottabyte (derived from the SI prefix Yotta-) is a unit of Information or Computer storage equal to one septillion (one long scale Quadrillion) bytes. It is commonly abbreviated YB.
1 yottabyte = 1024 (1,000,000,000,000,000,000,000,000) bytes, or 280 (1,208,925,819,614,629,174,706,176) bytes. This is 10,000,000,000,000 times as much data as a 100-Gigabyte hard drive can store.
It is a pleasant coincidence that Avogadro's number, 6.0221415×1023 is approximately equal to 279. That is, Avogadro's number is almost a "round number" in binary, and a (binary) yottabyte is approximately 2.01 × Avogadro's number of bytes. It can be said that a (binary) yottabyte is about 2 moles of bytes.