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The gigabyte (/ˈɡɪɡəbaɪt/ GIG-ə-byt or /ˈdʒɪɡəbaɪt/) is a multiple of the unit byte for digital information. The prefix giga means 109 in the International System of Units (SI). Therefore, one gigabyte is 1 000 000 000 bytes. The unit symbol for the gigabyte is GB.
The tebibit is a multiple of the bit, a unit of information, prefixed by the standards-based multiplier tebi (symbol Ti), a binary prefix meaning 240. The unit symbol of the tebibit is Tibit. 1 tebibit = 240 bits = 1099511627776 bits = 1024 gibibits.