Mebibyte Per Second (MiB/s)

ComputingCurrent unit

1,048,576 bytes per second (8.39 Mbps). Used by some operating systems and storage tools.

1 mebibyte per second = 8,388,608 bits per second (exactly).

1 mebibyte per second = 8,388,608 bits per second

About the mebibyte per second

Mebibyte is one of the newest words in computing. In December 1998 the IEC approved names for binary multiples, published in 1999 as an amendment to IEC 60027-2. Each keeps the first two letters of its SI counterpart and adds bi for binary, so mebi stands for 2²⁰. The aim was to stop mega meaning 10⁶ in telecommunications and storage but 2²⁰ in memory, a split that left room for incompatibility.

A mebibyte per second is 1,048,576 bytes per second, about 8.39 Mbit/s, so it is roughly 4.9 percent larger than 1 MB/s. Some operating systems and tools divide by 1,024 and then print the result with a plain MB label, so one program may show 11.9 for a transfer that another shows as 12.5. For example, a 100 Mbit/s link carries about 11.92 MiB/s at most. The IEEE chose to keep SI meanings in its own standards, allowing base-two use of mega only when explicitly noted.

Sources: NIST: Prefixes for binary multiples; Wikipedia: Data-rate units; Wikipedia: Megabyte

Mebibyte Per Second conversion chart

1 mebibyte per second expressed in every other data transfer rate unit:

Unit1 mebibyte per second
Bps8,388,608
Kbps8,388.608
Mbps8.388608
Gbps0.008388608
MB/s1.048576
Tbps0.000008388608
B/s1,048,576
KB/s1,048.576
GB/s0.001048576
Kibit/s8,192
Mibit/s8
Gibit/s0.0078125
KiB/s1,024
GiB/s0.0009765625

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