MB to KB – convert megabytes to kilobytes
Convert MB to KB (megabytes to kilobytes) to check whether files fit inside strict upload or attachment limits. This page opens the main data converter with MB → KB pre-selected so you can quickly break megabytes down into fine-grained kilobytes.
Open the interactive MB → KB converter:
Use main converter (MB → KB) or switch to KB → MBThis site uses binary prefixes, so 1 MB = 1024 KB and 1 KB = 1024 bytes. That’s why your computer sometimes reports slightly different values than marketing numbers rounded to powers of 1000.
Quick reference: MB to KB
In binary data units, 1 MB = 1024 KB, so: KB = MB × 1024. Some typical file sizes:
| Megabytes (MB) | Kilobytes (KB) |
|---|---|
| 0.5 MB | 512 KB |
| 1 MB | 1024 KB |
| 2 MB | 2048 KB |
| 5 MB | 5120 KB |
| 10 MB | 10240 KB |
| 25 MB | 25600 KB |
| 50 MB | 51200 KB |
MB to KB conversion formula
The binary conversion from megabytes to kilobytes is:
KB = MB × 1024
Examples:
- 3 MB × 1024 = 3072 KB
- 7.5 MB × 1024 = 7680 KB
- 20 MB × 1024 = 20480 KB
Why convert MB to KB?
MB to KB conversions show up when you:
- Design web assets and need image sizes below a certain KB limit.
- Upload documents or forms that cap file size in kilobytes.
- Optimise app icons, sprites and fonts for faster loading.
- Compare older software limits (KB) with modern storage listed in MB.
More data converters on this site
On the homepage, use the dropdowns to switch between any combination of bits, bytes, KB, MB, GB and TB, then hit “Share this conversion” to copy a direct link for later.