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| SI prefixes | Binary prefixes | |||
| Name (Symbol) |
Standard SI |
Binary usage |
Name (Symbol) |
Value |
| 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 |
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 125 (decimal) gigabytes or 122 (binary) gibibytes.
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%.
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