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Multiples of bytes
Value Metric
1000 kB kilobyte
10002 MB megabyte
10003 GB gigabyte
10004 TB terabyte
10005 PB petabyte
10006 EB exabyte
10007 ZB zettabyte
10008 YB yottabyte
1024 KiB kibibyte KB kilobyte
10242 MiB mebibyte MB megabyte
10243 GiB gibibyte GB gigabyte
10244 TiB tebibyte
10245 PiB pebibyte
10246 EiB exbibyte
10247 ZiB zebibyte
10248 YiB yobibyte

The zebibyte is a multiple of the unit byte for digital information. It is a member of the set of units with binary prefixes defined by the International Electrotechnical Commission (IEC). Its unit symbol is ZiB.

The prefix zebi (symbol Zi) represents multiplication by 10247, therefore:

1 zebibyte = 270 bytes = 1180591620717411303424bytes = 1024 exbibytes

The prefix zebi was added to the system of binary prefixes in August 2005.[1]

One zebibyte (1 ZiB) is equal to eight zebibits (8 Zibit).

One thousand twenty-four zebibytes (1024 ZiB) is equal to one yobibyte (1 YiB).

Usage examples[edit]

In late 2017, commercial internal hard drives for the consumer PC market were available up to about 10 to 12 TB (as single drives, multiple drive arrays with higher total capacity are also available, generally as external devices). The available information storage of 1 ZiB is therefore equivalent to approximately 100 million of the largest hard drives available on consumer PCs.

See also[edit]


  1. ^ News & views from the IEC June 2012
  2. ^ "FAQ: Drive Partition Limits" (PDF). UEFI Forum. 2010-06-09. Retrieved 2013-05-29.
  3. ^ Roderick W. Smith (2012-07-03). "Make the most of large drives with GPT and Linux". IBM. Retrieved 2013-05-29. Disk pointers are 64 bits in size, meaning that GPT can handle disks of up to 512 x 264 bytes (8 zebibytes, or 8.6 billion TiB), assuming 512-byte sectors.
  4. ^ "Oracle Solaris ZFS Administration Guide". Oracle Corporation. Retrieved July 27, 2013.