Digital storage
KB to MB Converter
Convert kilobytes and megabytes both ways. Toggle between binary (1024) and decimal (1000) factors.
How to convert KB to MB
To convert kilobytes (KB) to megabytes (MB), divide the number of kilobytes by the conversion factor. There are two widely used factors, and this converter supports both:
- Binary (1024): 1 MB = 1024 KB. Used by Windows, RAM and most operating systems when they report file and memory sizes.
- Decimal (1000): 1 MB = 1000 KB. Used by storage manufacturers, network speeds and the official SI definition.
So 5120 KB ÷ 1024 = 5 MB (binary), or 5120 KB ÷ 1000 = 5.12 MB (decimal). Type a value in either box above and the other updates instantly — it works both directions.
KB to MB conversion table (binary, ÷1024)
| Kilobytes (KB) | Megabytes (MB) |
|---|---|
| 256 KB | 0.25 MB |
| 512 KB | 0.5 MB |
| 1024 KB | 1 MB |
| 2048 KB | 2 MB |
| 5120 KB | 5 MB |
| 10240 KB | 10 MB |
| 102400 KB | 100 MB |
Binary vs decimal — which should I use?
If you are checking a file size shown by your computer, use binary (1024). If you are matching the capacity printed on a hard drive, USB stick or an internet plan, use decimal (1000). The difference grows with size: a "1 TB" drive shows as roughly 931 GB in Windows for exactly this reason.
Frequently asked questions
How many KB are in 1 MB?
It depends on the factor. In binary (used by operating systems) 1 MB = 1024 KB. In decimal (used by storage makers and SI) 1 MB = 1000 KB.
Is 1024 KB equal to 1 MB?
Yes, under the binary convention that Windows and most operating systems use, 1024 KB = 1 MB. Under the decimal SI convention, 1000 KB = 1 MB.
How do I convert MB back to KB?
Multiply the megabytes by your factor: MB × 1024 (binary) or MB × 1000 (decimal). Just type into the Megabytes box above and the KB value fills in automatically.
Does this converter store my data?
No. Everything runs locally in your browser — your input isn't uploaded or stored.
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