octet

The octet is a unit of digital information in computing and telecommunications that consists of eight bits.

The binary value of all eight bits set (or activated) is 111111112, equal to the hexadecimal value FF16, the decimal value 25510, and the octal value 3778. One octet can be used to represent decimal values ranging from 0 to 255.

Unit multiples

SI prefixes

1 kilooctet (ko) = 103 octets = 1000 octets 1 megaoctet (Mo) = 106 octets = 1000 ko = 1000000 octets 1 gigaoctet (Go) = 109 octets = 1000 Mo = 1000000000 octets 1 teraoctet (To) = 1012 octets = 1000 Go = 1000000000000 octets 1 petaoctet (Po) = 1015 octets = 1000 To = 1000000000000000 octets 1 exaoctet (Eo) = 1018 octets = 1000 Po = 1000000000000000000 octets 1 zettaoctet (Zo) = 1021 octets = 1000 Eo = 1000000000000000000000 octets 1 yottaoctet (Yo) = 1024 octets = 1000 Zo = 1000000000000000000000000 octets

Binary prefixes

1 kibioctet (Kio, also written Ko, as distinct from ko) = 210 octets = 1024 octets 1 mebioctet (Mio) = 220 octets = 1024 Kio = 1048576 octets 1 gibioctet (Gio) = 230 octets = 1024 Mio = 1073741824 octets 1 tebioctet (Tio) = 240 octets = 1024 Gio = 1099511627776 octets 1 pebioctet (Pio) = 250 octets = 1024 Tio = 1125899906842624 octets 1 exbioctet (Eio) = 260 octets = 1024 Pio = 1152921504606846976 octets 1 zebioctet (Zio) = 270 octets = 1024 Eio = 1180591620717411303424 octets 1 yobioctet (Yio) = 280 octets = 1024 Zio = 1208925819614629174706176 octets