Kilobytes to Megabytes
Type a value in either box to convert between kilobytes and megabytes. The factor is 0.001.
| Kilobytes | Megabytes |
|---|---|
| 1 KB | 0.001 MB |
| 2 KB | 0.002 MB |
| 3 KB | 0.003 MB |
| 5 KB | 0.005 MB |
| 10 KB | 0.01 MB |
| 25 KB | 0.025 MB |
| 50 KB | 0.05 MB |
| 100 KB | 0.1 MB |
How to use
- Enter a value in the Kilobytes field.
- The Megabytes figure appears immediately — no button to press.
- Typing in the Megabytes field converts back to Kilobytes the same way.
- Use the reference table for the values that come up most often.
Kilobytes to Megabytes formula
The factor from kilobytes to megabytes is 0.001.
MB = KB × 0.001
Put another way, one kilobyte is exactly 1/1,000 of a megabyte.
Why this factor: the kilobyte and the megabyte are both defined against the byte, so dividing one definition by the other gives 0.001 directly. Both definitions are set out in full below.
To go the other way, divide by 0.001 — or use the Megabytes to Kilobytes converter, which is the same calculation reversed.
Worked example
Take 4 KB and multiply by the factor 0.001: the result is 0.004 MB.
4 KB × 0.001 = 0.004 MB
The converter above does this for any value you type, in either direction.
What is a kilobyte?
A kilobyte is 1,000 bytes in the decimal convention used by storage manufacturers and standards bodies.
Definition: Exactly 1,000 bytes under SI prefixes. The binary equivalent, 1,024 bytes, is properly the kibibyte (KiB).
Where it is used: Small file sizes, text documents, and web page weights.
Worth knowing: This decimal-versus-binary split is why a '1 TB' drive shows as about 931 GB in Windows: the drive uses 10¹², the OS displays 2⁴⁰.
What is a megabyte?
A megabyte is one million bytes, the familiar unit for photos, songs and app sizes.
Definition: Exactly 1,000,000 bytes under SI prefixes. The binary mebibyte (MiB) is 1,048,576 bytes.
Where it is used: Photo and audio file sizes, app downloads, and mobile data allowances.
Kilobytes vs Megabytes
The kilobyte and the megabyte belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many megabytes are in a kilobyte?
One kilobyte equals 0.001 megabytes.
What is the formula to convert kilobytes to megabytes?
Multiply the number of kilobytes by 0.001. To reverse it, divide by 0.001 instead.
How do I convert megabytes back to kilobytes?
Divide by 0.001, which is the same as multiplying by 1000.
How many megabytes are in 10 kilobytes?
10 KB works out to 0.01 MB.
Is there anything to watch out for with kilobytes?
This decimal-versus-binary split is why a '1 TB' drive shows as about 931 GB in Windows: the drive uses 10¹², the OS displays 2⁴⁰.
How is the kilobyte defined?
Exactly 1,000 bytes under SI prefixes. The binary equivalent, 1,024 bytes, is properly the kibibyte (KiB).