Because megabits are ambiguous and misuse the prefix "mega" as defined by the International System of Units, the International Electrotechnical Commission established mebibits in 1998.
A mebibit is always equal to 2^20, or 1,048,576 bits or 1024 kibibits.
As a unit of measurement, mebibits are normally used for RAM and ROM capacity.
Mebibits are 1,024 kibits and precede gibi, tebi, pebi, exbi, zebi and yobi in bit measurement.
Very similar to megabits, which use a less exact prefix established by the International System of Units (SI) but are used much more commonly.