Megabyte to Kilobyte Converter (MB to KB)
1 megabyte = 1,000 kilobyte. In decimal units 1 MB is 1,000 KB.
Result
5 MB = 5,000 KB
How to convert megabyte to kilobyte
In decimal units 1 MB is 1,000 KB. Email attachments, photos and documents are commonly sized in MB or KB.
Formula
KB = MB × 1,000
Worked example
5 MB × 1,000 = 5,000 KB
Megabyte to Kilobyte quick-reference table
| Megabyte (MB) | Kilobyte (KB) |
|---|---|
| 0.1 MB | 100 KB |
| 0.5 MB | 500 KB |
| 1 MB | 1,000 KB |
| 5 MB | 5,000 KB |
| 10 MB | 10,000 KB |
| 25 MB | 25,000 KB |
Real-life examples
A 5 MB photo is 5,000 KB, and a 25 MB email attachment limit is 25,000 KB.
Frequently asked questions
How many KB are in an MB?
In SI units there are 1,000 KB in 1 MB. Some software uses 1,024 KB (strictly 1 MiB = 1,024 KiB).
What is the common email attachment limit?
Gmail and many providers cap attachments at 25 MB, which is 25,000 KB.
What is 1 megabyte in kilobyte?
1 megabyte = 1,000 kilobyte (MB to KB).
What is the formula to convert MB to KB?
KB = MB × 1,000. For example, 5 MB × 1,000 = 5,000 KB.
How do I convert KB back to MB?
Use the reverse converter: 1 kilobyte = 0.001 megabyte. Check: 5,000 KB converts back to 5 MB.
Reverse conversion
Need the other direction? Kilobyte to Megabyte converter (KB to MB): 1 kilobyte = 0.001 megabyte.
Related data storage conversions
- Gigabyte to Megabyte converter
- Megabyte to Gigabyte converter
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- Byte to Bit converter
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