1 B equals 1E-6 MB. To convert B to MB, multiply the value by 1E-6; divide by 1E-6 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert B to MB?
The conversion formula is MB = B × 1E-6. The conversion factor is fixed by definition, so the result is always exact.
B to MB conversion table
| B | MB |
|---|---|
| 1 B | 1E-6 MB |
| 2 B | 2E-6 MB |
| 5 B | 5E-6 MB |
| 10 B | 1E-5 MB |
| 100 B | 0.0001 MB |
| 1,000 B | 0.001 MB |
What is B (B)?
A byte is eight bits and the basic unit of file size. One character of text is roughly one byte; larger files are measured in kilobytes, megabytes and gigabytes.
What is MB (MB)?
A megabyte (MB) is 1,000,000 bytes (decimal). A few minutes of MP3 audio or one high-quality photo is a few megabytes.
Why convert B to MB?
Decimal units (KB, MB, GB) are used by drive makers and networks; binary units (KiB, MiB, GiB) by operating systems and RAM. The roughly 7% gap per step is why drives look 'smaller' than advertised.
Storage makers use decimal units: 1 GB = 1,000 MB = 1,000,000,000 bytes. Operating systems often show binary units, where 1 GiB = 1,024 MiB — which is why a '1 TB' drive appears as about 931 GiB (IEC 80000-13).
How to convert B to MB
- Enter the value in B into the left field of the converter.
- Read the result in MB instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (MB to B).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.