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Multiples of bits
SI decimal prefixes IEC binary prefixes
kilobit (kbit) 103 210 kibibit (Kibit) 210
megabit (Mbit) 106 220 mebibit (Mibit) 220
gigabit (Gbit) 109 230 gibibit (Gibit) 230
terabit (Tbit) 1012 240 tebibit (Tibit) 240
petabit (Pbit) 1015 250 pebibit (Pibit) 250
exabit (Ebit) 1018 260 exbibit (Eibit) 260
zettabit (Zbit) 1021 270 zebibit (Zibit) 270
yottabit (Ybit) 1024 280 yobibit (Yibit) 280
See also: Nibble · Byte · Multiples of bytes
Orders of magnitude of data

A terabit is a unit of information or computer storage, abbreviated Tbit (or Tb).

1 terabit = 1012 bits = 1,000,000,000,000 bits (one trillion, or, using the long scale, one billion). 1 terabit is equal to 1,000 (decimal) gigabits and a tebibit to 1,024 (binary) gibibits. 1 terabit is also equal to 125 gigabytes.

The terabit is closely related to the tebibit, which is equal to 240 or 1,099,511,627,776 bits. Note that the difference between a trillion bits and a tebibit is about 10%.But in normal computer parlance a terabit would really refer to a tebibit of 1040


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