Data Storage converter
Megabytes to Kilobytes
Megabytes and Kilobytes measure the same quantity in different unit systems. The relationship is 1 MB = 1,000 KB, which gives 1,000 KB per MB. Below you can convert any value, check a worked example and read the full chart.
Formula 1 MB = 1,000 KB
Need the other direction? Kilobytes to Megabytes.
How to convert Megabytes to Kilobytes
A decimal megabyte is 10^6 bytes; a mebibyte is 2^20 bytes. A decimal kilobyte is 1,000 bytes; a kibibyte is 1,024 bytes.
To convert Megabytes to Kilobytes, multiply the value in MB by 1,000. For example, 10 MB × 1,000 = 10,000 KB. This works because the ratio between the two units is constant for every value in data storage.
Worked examples
| MB | KB |
|---|---|
| 1 MB | 1,000 KB |
| 2.5 MB | 2,500 KB |
| 5 MB | 5,000 KB |
| 10 MB | 10,000 KB |
| 25 MB | 25,000 KB |
| 50 MB | 50,000 KB |
| 100 MB | 100,000 KB |
Reverse conversion
| KB | MB |
|---|---|
| 1 KB | 0.001 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 |
When this conversion is useful
This is the calculation you need when you are sizing a backup, a download or a storage plan and the units are mixed. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 MB is 1,000,000 KB.
Is the conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
MB to KB conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Megabytes (MB) | Kilobytes (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 |
| 6 MB | 6,000 KB |
| 7 MB | 7,000 KB |
| 8 MB | 8,000 KB |
| 9 MB | 9,000 KB |
| 10 MB | 10,000 KB |
| 11 MB | 11,000 KB |
| 12 MB | 12,000 KB |
| 13 MB | 13,000 KB |
| 14 MB | 14,000 KB |
| 15 MB | 15,000 KB |
| 16 MB | 16,000 KB |
| 17 MB | 17,000 KB |
| 18 MB | 18,000 KB |
| 19 MB | 19,000 KB |
| 20 MB | 20,000 KB |
| 21 MB | 21,000 KB |
| 22 MB | 22,000 KB |
| 23 MB | 23,000 KB |
| 24 MB | 24,000 KB |
| 25 MB | 25,000 KB |
| 26 MB | 26,000 KB |
| 27 MB | 27,000 KB |
| 28 MB | 28,000 KB |
| 29 MB | 29,000 KB |
| 30 MB | 30,000 KB |
| 31 MB | 31,000 KB |
| 32 MB | 32,000 KB |
| 33 MB | 33,000 KB |
| 34 MB | 34,000 KB |
| 35 MB | 35,000 KB |
| 36 MB | 36,000 KB |
| 37 MB | 37,000 KB |
| 38 MB | 38,000 KB |
| 39 MB | 39,000 KB |
| 40 MB | 40,000 KB |
| 41 MB | 41,000 KB |
| 42 MB | 42,000 KB |
| 43 MB | 43,000 KB |
| 44 MB | 44,000 KB |
| 45 MB | 45,000 KB |
| 46 MB | 46,000 KB |
| 47 MB | 47,000 KB |
| 48 MB | 48,000 KB |
| 49 MB | 49,000 KB |
| 50 MB | 50,000 KB |
| 60 MB | 60,000 KB |
| 70 MB | 70,000 KB |
| 80 MB | 80,000 KB |
| 90 MB | 90,000 KB |
| 100 MB | 100,000 KB |
Frequently asked questions
How many Kilobytes are in 1 Megabytes?
1 MB equals 1,000 KB.
How do I convert Megabytes to Kilobytes?
Multiply the MB value by 1,000. Example: 25 MB = 25,000 KB.
What is 2.5 MB in KB?
2.5 MB = 2,500 KB.
Is the MB to KB conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.