Megabytes (MB) to Kilobytes (KB) Converter
The Megabytes (MB) to Kilobytes (KB) Converter turns your Megabyte (MB) value into Kilobytes (KB). Type your storage value in the input field — 1 MB = 1,000 KB, calculated across both decimal (SI) and binary (IEC) standards.
Megabytes (MB) to Kilobytes (KB) Converter
How to Convert Megabytes to Kilobytes
To convert megabytes to kilobytes, multiply by 1,000 (using SI decimal). Both units measure storage capacity—the difference is scale. Learn more: Kilobytes to Megabytes calculator.
MB: A megabyte is 1,000 kilobytes or 1,000,000 bytes using the SI decimal standard. Related: convert Megabytes to Zebibits.
KB: A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Learn more: Bytes to Kilobytes conversion.
1 MB = 1,000 KB (using SI decimal standard) — which means there are 1,000kilobytes in every megabyte.
MB to KB Conversion Formula
// Convert MB to KB
KB = MB × 1,000
// Reverse: Convert KB to MB
MB = KB × 0.001Megabyte to Kilobyte Conversion Examples
100 MB = 100,000 KB
256 MB = 256,000 KB
500 MB = 500,000 KB
1,000 MB = 1,000,000 KB
2,048 MB = 2,048,000 KB
Binary Standard (Base 1024)
Using binary calculation: 1 MB = 1,024 KB
100 MB = 102,400 KB
1,000 MB = 1,024,000 KB
1,024 MB = 1,048,576 KB
What Is a Megabyte (MB)? Definition and Uses
A megabyte is 1,000 kilobytes or 1,000,000 bytes using the SI decimal standard. Check out our Yb to Mebibits converter.
The megabyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. See also: Yobibits Per Second to Pbps calculator.
Common uses: MP3 files, high-resolution images, short video clips, software installers Check out our convert MB to Zettabits.
1 MB = 8 × 10⁶ bits = 1 × 10⁶ bytes.
The megabyte can be abbreviated as MB; for example, 1 megabyte can be written as 1 MB.
What Is a Kilobyte (KB)? Definition and Uses
A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Check out our Zettabits to KB.
The kilobyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. You might also need: how many Mib in Petabytes.
Common uses: Text documents, small images, email attachments, configuration files Related: how many Pebibytes Per Second in a TB/s.
1 KB = 8,000 bits = 1,000 bytes.
The kilobyte can be abbreviated as KB; for example, 1 kilobyte can be written as 1 KB.
Megabyte to Kilobyte Conversion Table
The table below shows various megabyte measurements converted to kilobytes.
| Megabytes | Kilobytes | Kilobytes (Binary) |
|---|---|---|
| 1 MB | 1,000 KB | 1,024 KB |
| 2 MB | 2,000 KB | 2,048 KB |
| 5 MB | 5,000 KB | 5,120 KB |
| 10 MB | 10,000 KB | 10,240 KB |
| 25 MB | 25,000 KB | 25,600 KB |
| 50 MB | 50,000 KB | 51,200 KB |
| 100 MB | 100,000 KB | 102,400 KB |
| 128 MB | 128,000 KB | 131,072 KB |
| 250 MB | 250,000 KB | 256,000 KB |
| 256 MB | 256,000 KB | 262,144 KB |
| 500 MB | 500,000 KB | 512,000 KB |
| 512 MB | 512,000 KB | 524,288 KB |
| 1,000 MB | 1,000,000 KB | 1,024,000 KB |
| 1,024 MB | 1,024,000 KB | 1,048,576 KB |
SI Decimal vs Binary: Why Two Different Standards?
When converting megabytes to kilobytes, different tools may give slightly different results. This is because there are two competing standards for measuring digital storage:
| Standard | Base | 1 KB equals | Used By |
|---|---|---|---|
| SI Decimal | 1000 | 1,000 bytes | Hard drive manufacturers, macOS, network speeds |
| Binary (IEC) | 1024 | 1,024 bytes | Windows, Linux (partially), RAM specifications |
Note: Our calculator defaults to SI decimal (base 1000) to match the box label. To match Windows, toggle the standard at the top of the calculator.