Mebibit
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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 mebibit (a contraction of mega binary digit) is a unit of information or computer storage, abbreviated Mibit or sometimes Mib.
This unit is most useful for measuring RAM and ROM chip capacity.
The mebibit is closely related to the megabit, which equals to 106 bits = 1,000,000 bits, but sometimes used to denote the mebibit value in computer technology slang. Throughout the 1980s and 1990s, video game manufacturers would sometimes boast the amount of internal cartridge ROM (in “megabits”) on their packaging, as a selling point. One “megabit” would equate to 128 KiB; 8 “megabits” would equal one mebibyte of ROM containing game instructions and data.
