Megabytes to Mebibytes Converter

About the mb to mib calculation

One megabyte is exactly 0.953674 mebibytes, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Decimal megabyte — 1,000,000 bytes, the definition storage manufacturers use. Binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB".

Formula

MiB = MB × 0.953674

1 MB = 0.953674 MiB
1 MiB = 1.0486 MB

Worked example

To convert 500 MB, multiply by 0.953674: 500 × 0.953674 = 476.837 MiB.

Frequently asked questions

How many mebibytes are in a megabyte?

There are 0.953674 mebibytes in one megabyte. To convert any amount, multiply the number of megabytes by 0.953674.

How do I convert mebibytes back to megabytes?

Divide instead of multiplying, or equivalently multiply by 1.0486. One mebibyte is 1.0486 megabytes.

Is this conversion exact?

Yes, provided both sides use the same convention. Decimal units (KB, MB, GB) are powers of 1,000 and binary units (KiB, MiB, GiB) are powers of 1,024. Both are exact — the confusion comes from software labelling binary values with decimal names.

Where is each of these units used?

Megabytes: decimal megabyte — 1,000,000 bytes, the definition storage manufacturers use. Mebibytes: binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB".

Sources

• IEC 80000-13 — binary and decimal prefixes for information units