How to convert megabytes to kilobytes
To convert megabytes to kilobytes, multiply by 1,000. Data size conversions matter for file uploads, cloud storage plans, hard drives and internet usage. Decimal (SI) prefixes are used: 1 KB = 1,000 bytes.
Megabyte to Kilobyte conversion table
| Megabyte (MB) | Kilobyte (KB) |
|---|---|
| 0.1 MB | 100 KB |
| 0.5 MB | 500 KB |
| 1 MB | 1,000 KB |
| 2 MB | 2,000 KB |
| 3 MB | 3,000 KB |
| 4 MB | 4,000 KB |
| 5 MB | 5,000 KB |
| 10 MB | 10,000 KB |
| 20 MB | 20,000 KB |
| 25 MB | 25,000 KB |
| 50 MB | 50,000 KB |
| 100 MB | 100,000 KB |
| 500 MB | 500,000 KB |
| 1,000 MB | 1,000,000 KB |
About the units
Megabyte (MB)
A megabyte is 1,000,000 bytes, roughly the size of a short MP3 minute or a photo.
Kilobyte (KB)
A kilobyte is 1,000 bytes in the SI decimal system used by drive makers (1 KiB = 1,024 bytes).
How to use this converter
- Type the number of megabytes (MB) in the input box.
- The result in kilobytes appears instantly — no button needed.
- See the same value in every other data storage unit just below.
- Use “Swap units” to convert kilobytes back to megabytes.
When you’ll use the megabyte to kilobyte conversion
Converting megabytes to kilobytes comes up more often than you might expect — for example when checking whether a file fits an upload limit, comparing phone or cloud storage plans, or estimating download times. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 MB = 1,000 KB.
Watch out for these mix-ups
- Drive makers use 1 KB = 1,000 bytes; operating systems often show KiB (1,024).
- Internet speeds are in bits per second, file sizes in bytes — a factor of 8.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many kilobytes are in one megabyte?
One megabyte equals 1,000 kilobytes. 1,000 is the exact factor used by this converter.
How do I convert megabytes to kilobytes?
Multiply the value in megabytes by 1,000. To go the other way, multiply kilobytes by 0.001.
What is 10 MB in KB?
10 MB = 10,000 KB. Also, 5 MB = 5,000 KB and 100 MB = 100,000 KB.
What is the difference between a megabyte and a kilobyte?
A megabyte is 1,000,000 bytes, roughly the size of a short MP3 minute or a photo. A kilobyte is 1,000 bytes in the SI decimal system used by drive makers (1 KiB = 1,024 bytes).
Is this tool free and private?
Yes — the Megabyte to Kilobyte is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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