Value  Metric 
1000 kbit kilobit
10002 Mbit megabit
10003 Gbit gigabit
10004 Tbit terabit
10005 Pbit petabit
10006 Ebit exabit
10007 Zbit zettabit
10008 Ybit yottabit
Value  IEC  Legacy 
1024 Kibit kibibit Kbit Kb kilobit
10242 Mibit mebibit Mbit Mb megabit
10243 Gibit gibibit Gbit Gb gigabit
10244 Tibit tebibit Tbit Tb terabit
10245 Pibit pebibit
10246 Eibit exbibit
10247 Zibit zebibit
10248 Yibit yobibit
Orders of magnitude of data

The mebibit is a multiple of the bit, a unit of information, prefixed by the standards-based multiplier "mebi" (symbol Mi), a binary prefix meaning 220.[1][2] The unit symbol of the mebibit is Mibit.

1 mebibit = 220 bits = 1048576bits = 1024 kibibits[3]

This unit is most useful for measuring RAM and ROM chip capacity.

The mebibit is closely related to the megabit which equals 106 bits = 1,000,000 bits.

Throughout the 1980s and 1990s, video game manufacturers sometimes reported the amount of internal cartridge read-only memory (ROM) on packaging in megabits, where 1 megabit equaled 128 kibibyte and 8 megabits were 1 mebibyte of ROM, containing game instructions and data.

See alsoEdit


  1. ^ International Electrotechnical Commission, IEC 60027-2 (2000-11) Ed. 2.0
  2. ^ A.J. Thor (2000). "Prefixes for binary multiples". Metrologia. 37 (81): 81. doi:10.1088/0026-1394/37/1/12.
  3. ^ Definitions of the SI units: The binary prefixes