KB to MB Converter
Convert kilobytes to megabytes — a thousand to the megabyte in decimal units. Results update as you type; exact factors shown.
One kilobyte (10³) is 0.001 megabyte (10⁶) — see the exact factor, not a rounded rule of thumb.
How the kb to mb 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 |
|---|---|---|
| 100 kB | 0.1 MB | kilobyte (10³) to megabyte (10⁶) |
| 500 kB | 0.5 MB | kilobyte (10³) to megabyte (10⁶) |
| 1,000 kB | 1 MB | kilobyte (10³) to megabyte (10⁶) |
| 1,024 kB | 1.024 MB | kilobyte (10³) to megabyte (10⁶) |
| 2,000 kB | 2 MB | kilobyte (10³) to megabyte (10⁶) |
| 5,000 kB | 5 MB | kilobyte (10³) to megabyte (10⁶) |
| 10,000 kB | 10 MB | kilobyte (10³) to megabyte (10⁶) |
| 25,000 kB | 25 MB | kilobyte (10³) to megabyte (10⁶) |
| 50,000 kB | 50 MB | kilobyte (10³) to megabyte (10⁶) |
| 100,000 kB | 100 MB | kilobyte (10³) to megabyte (10⁶) |
| 500,000 kB | 500 MB | kilobyte (10³) to megabyte (10⁶) |
| 1,000,000 kB | 1,000 MB | kilobyte (10³) to megabyte (10⁶) |
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 KB in an MB?
1,000 decimal, or 1,024 KiB binary.
How big is a web page?
A typical page is 2,000–3,000 KB, so 2–3 MB.
How big is an email?
A plain one is a few KB; attachments dominate the rest.
Which units does my computer show?
Usually binary, so a "1 MB" file may display as 0.98 MiB.
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.