Kilobytes to Megabytes Converter
Convert kilobytes to megabytes and back, in binary or decimal units.
Quick Reference: KB to MB (Binary)
| Kilobytes (KB) | Megabytes (MB) |
|---|---|
| 100 KB | 0.097656 MB |
| 512 KB | 0.5 MB |
| 1024 KB | 1 MB |
| 2048 KB | 2 MB |
| 5120 KB | 5 MB |
Binary vs Decimal Units
There are two common ways to relate kilobytes and megabytes, and they give slightly different results. The binary definition treats 1 megabyte as 1024 kilobytes (210), reflecting how computer memory is addressed in powers of two. The decimal definition treats 1 megabyte as 1000 kilobytes, following the standard SI prefixes used for most other units of measurement.
- Binary (1024): MB = KB ÷ 1024, KB = MB × 1024. Often used by operating systems such as Windows when reporting file and disk sizes.
- Decimal (1000): MB = KB ÷ 1000, KB = MB × 1000. Commonly used by storage manufacturers and networking equipment.
Understanding File Sizes
A byte is the basic unit of digital information, made up of 8 bits. A kilobyte is roughly a thousand bytes, and a megabyte is roughly a million bytes. Knowing how these scale helps you estimate how much space documents, photos, music, and videos take up, and how long they will take to transfer over a connection.
- Plain text document: typically a few KB to a few hundred KB.
- High-resolution photo: often 2 MB to 10 MB.
- MP3 song: usually 3 MB to 8 MB.
- Short HD video: can easily reach tens or hundreds of MB.
Common Uses
Converting between kilobytes and megabytes is useful when checking email attachment limits, comparing download sizes, planning storage for backups, or working with upload caps on websites and apps. Whether you are a developer sizing assets, a photographer managing media, or simply trying to understand a file size shown on screen, this converter gives you instant, two-way results in both binary and decimal units.