How many megabytes are in a mebibyte?

Exactly 1.048576 MB. One mebibyte = 1,048,576 bytes; one megabyte = 1,000,000 bytes; 1,048,576 ÷ 1,000,000 = 1.048576.

What is the difference between MB and MiB?

A megabyte (MB) is a decimal unit: 1 MB = 1,000,000 bytes. A mebibyte (MiB) is a binary unit: 1 MiB = 1,048,576 bytes. The difference is about 4.86%. Storage drives are labeled in MB; operating systems report memory in MiB, which is why a "500 MB" drive appears smaller than expected in Windows or macOS.

Why does Windows show less storage than the drive label?

Drive manufacturers use decimal MB (1 MB = 1,000,000 bytes). Windows reports sizes in binary MiB but displays them with the label "MB" or "GB." A 500 MB drive is 500,000,000 bytes, which Windows reports as about 476.8 MiB — labeled incorrectly as "476.8 MB."

Can I enter decimal mebibyte values?

Yes. The converter accepts any non-negative number, including decimals like 1.5 MiB, which equals 1.572864 MB.

Is the conversion factor exact?

Yes. 1 MiB = 1,048,576 bytes exactly, and 1 MB = 1,000,000 bytes exactly, so the factor 1.048576 is exact with no rounding.

Mebibytes to Megabytes Converter

Enter a mebibyte value and instantly get the equivalent in megabytes, with the formula and a reference table.

Input

Number of mebibytes (MiB)

Formula

MB = MiB × 1.048576
(= MiB × 1,048,576 ÷ 1,000,000)

Result

Enter a mebibyte value above and click Convert.

Reference Table

Mebibytes (MiB)	Bytes	Megabytes (MB)
0.5 MiB	524,288	0.524288 MB
1 MiB	1,048,576	1.048576 MB
2 MiB	2,097,152	2.097152 MB
5 MiB	5,242,880	5.24288 MB
10 MiB	10,485,760	10.48576 MB
50 MiB	52,428,800	52.4288 MB
100 MiB	104,857,600	104.8576 MB
512 MiB	536,870,912	536.870912 MB
1,024 MiB (1 GiB)	1,073,741,824	1,073.741824 MB

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Summary

This tool converts mebibytes (MiB) to megabytes (MB) using the precise IEC-to-SI conversion factor. One mebibyte equals exactly 1,048,576 bytes (2²⁰), while one megabyte equals exactly 1,000,000 bytes (10⁶). Dividing gives the exact factor: 1 MiB = 1.048576 MB. This distinction matters when comparing OS memory reports (binary MiB) against storage drive labels (decimal MB).

How it works

Enter the number of mebibytes in the input field.
The converter multiplies the value by 1.048576 to produce megabytes.
The result and a step-by-step formula appear instantly.
A reference table shows common MiB values and their MB equivalents.
Use the Copy button to copy the megabyte result to your clipboard.

Use cases

Reconcile OS RAM reports (shown in MiB) with drive specs labeled in MB.
Convert file sizes from binary-reported values to decimal for documentation.
Verify storage allocation figures across tools that use different unit standards.
Translate firmware image sizes from binary to decimal for vendor comparison.
Clarify memory figures in cross-platform technical specifications.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu