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Convert MB to MiB
1 MB = 0.953674316406 MiB
Type a value in megabytes and the answer in mebibytes appears as you go. The conversion is exactly 0.953674316406 MiB to the megabyte, and it happens on your own machine — this page asks nothing of a server once it has loaded.
Where it runs
In your browser. The number you type is never part of a request.
Exact by definition
1 MB is exactly 0.953674316406 MiB — a definition, not a rounded factor.
Answers as you type
No button, no wait. The worked answer is already on the page before any script runs.
Megabyte and Mebibyte
A megabyte is a million bytes. Storage manufacturers have always used this decimal meaning, which is why their capacities look larger than what a computer reports.
A mebibyte is 1,024 kibibytes, or 1,048,576 bytes. Linux tools and memory sizes generally mean this even when they print "MB".
megabytes to mebibytes in practice
5 MB is 4.768 MiB
— a song at a good bitrate.
4000 MB is 3815 MiB
— a film at ordinary quality.
megabytes to mebibytes at a glance
| MB | MiB |
|---|---|
| 1 | 0.953674316406 |
| 2 | 1.90734863281 |
| 5 | 4.76837158203 |
| 10 | 9.53674316406 |
| 50 | 47.6837158203 |
| 100 | 95.3674316406 |
| 500 | 476.837158203 |
| 1000 | 953.674316406 |
Every figure here is computed from the same definition the calculator uses, so the table cannot drift away from the answer above it.
Convert MB to MiB: common questions
How many mebibytes are in a megabyte?
Exactly 0.953674316406. One megabyte is 0.953674316406 mebibytes, and the box above will do it for any figure you type.
Is this conversion exact, or rounded?
The ratio is exact. It is not a rounded constant typed into a table: it is derived from the definitions of the two units, so it agrees with any other correct converter to as many digits as you care to compare.
Why does another converter show a slightly different number?
Almost always rounding rather than disagreement. Many converters cut the answer to two or four decimals, and some carry a factor that was rounded before the multiplication rather than after. The figures here are computed from the exact definitions and only rounded on the way to the screen.
Where these figures come from
The claims this page makes about data units are checkable, and these are the documents that settle them.
How this page works
The factor is a constant in the page and the arithmetic is four operations, so nothing is sent anywhere and nothing needs to be. The number you type never leaves the browser — there is no request for it to travel in.