MB to Bytes Converter
Convert megabytes to bytes — a million bytes to the megabyte on the decimal definition. Results update as you type; exact factors shown.
One megabyte (10⁶) is 1,000,000 bytes — see the exact factor, not a rounded rule of thumb.
How the mb to bytes converter works
Storage converts through the byte (8 bits). Drive makers and network speeds use decimal prefixes (1 GB = 10⁹ bytes); operating systems often report binary units (1 GiB = 2³⁰ = 1,073,741,824 bytes) — sometimes labelled "GB". The gap is 7.4% at the gigabyte and 10% at the terabyte.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common data conversions
| From | To | Units |
|---|---|---|
| 0.001 MB | 1,000 B | megabyte (10⁶) to bytes |
| 0.01 MB | 10,000 B | megabyte (10⁶) to bytes |
| 0.1 MB | 100,000 B | megabyte (10⁶) to bytes |
| 1 MB | 1,000,000 B | megabyte (10⁶) to bytes |
| 2 MB | 2,000,000 B | megabyte (10⁶) to bytes |
| 5 MB | 5,000,000 B | megabyte (10⁶) to bytes |
| 10 MB | 10,000,000 B | megabyte (10⁶) to bytes |
| 50 MB | 50,000,000 B | megabyte (10⁶) to bytes |
| 100 MB | 100,000,000 B | megabyte (10⁶) to bytes |
| 500 MB | 500,000,000 B | megabyte (10⁶) to bytes |
| 1,000 MB | 1,000,000,000 B | megabyte (10⁶) to bytes |
| 5,000 MB | 5,000,000,000 B | megabyte (10⁶) to bytes |
Units in this converter and their exact factors
| Unit | Symbol | One unit in bytes |
|---|---|---|
| bit | bit | 0.125 byte |
| byte | B | 1 byte |
| kilobyte (10³) | kB | 1,000 byte |
| megabyte (10⁶) | MB | 1,000,000 byte |
| gigabyte (10⁹) | GB | 1,000,000,000 byte |
| terabyte (10¹²) | TB | 1,000,000,000,000 byte |
| kibibyte (2¹⁰) | KiB | 1,024 byte |
| mebibyte (2²⁰) | MiB | 1,048,576 byte |
| gibibyte (2³⁰) | GiB | 1,073,741,824 byte |
| tebibyte (2⁴⁰) | TiB | 1,099,511,627,776 byte |
FAQFrequently asked questions about data conversion
How many bytes in a megabyte?
Exactly 1,000,000 decimal, or 1,048,576 if you mean a mebibyte.
What is 5 MB in bytes?
5,000,000 bytes.
Which definition does my operating system use?
Windows and macOS report binary sizes; Windows labels them MB, macOS labels them MB but uses decimal since 10.6.
What is 1 MiB?
1,048,576 bytes — 4.9% more than a megabyte.
Why does it matter?
Because the gap compounds. At terabyte scale it is nearly 10%.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.