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Multiples of bits
Value Metric
1000 kbit kilobit
10002 Mbit megabit
10003 Gbit gigabit
10004 Tbit terabit
10005 Pbit petabit
10006 Ebit exabit
10007 Zbit zettabit
10008 Ybit yottabit
1024 Kibit kibibit Kbit kilobit
10242 Mibit mebibit Mbit megabit
10243 Gibit gibibit Gbit gigabit
10244 Tibit tebibit -
10245 Pibit pebibit -
10246 Eibit exbibit -
10247 Zibit zebibit -
10248 Yibit yobibit -

The zettabit is a multiple of the unit bit for digital information or computer storage. The prefix zetta (symbol Z) is defined in the International System of Units (SI) as a multiplier of 1021 (1 sextillion, short scale),[1] and therefore

1 zettabit = 1021bits = 1000000000000000000000bits = 1000 exabits.

The zettabit has the unit symbol Zbit or Zb.

The zettabit is closely related to the zebibit, a unit multiple derived from the binary prefix zebi of the same order of magnitude,[2] which is equal to 270bits = 1180591620717411303424bits, or approximately 18% larger than the zettabit.

As the 1021 exceeds the range of a 64-bit integer, media of the size of zettabits can only be recorded on 128-bit systems.[citation needed]

See also[edit]