Kilobytes to Megabytes Converter

Kilobytes to Megabytes

Convert kilobytes (KB) to megabytes (MB). Both measure digital storage, and the conversion comes up in computing, storage, internet work.

The Formula

`` megabytes = kilobytes × 0.001 kilobytes = megabytes × 1000 `

One kilobyte is 0.001 megabytes, and one megabyte is 1,000 kilobytes.

Conversion Table

Kilobytes	Megabytes
1 KB	0.001 MB
2 KB	0.002 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
500 KB	0.5 MB
1,000 KB	1 MB

The Other Direction

Megabytes	Kilobytes
1 MB	1,000 KB
2 MB	2,000 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
500 MB	500,000 KB
1,000 MB	1,000,000 KB

What Each Unit Is

Kilobytes (KB) — 1,000 bytes in decimal usage; 1,024 bytes in the binary convention (properly a kibibyte). The ambiguity dates to early computing, where 1,024 was close enough to "kilo" to reuse the prefix.

Megabytes (MB) — 1,000,000 bytes in decimal usage. The file-size unit of the CD-ROM era.

A Sense of Scale

• A page of plain text is about 2 KB
• A small icon is 5–20 KB
• An MP3 is 3–5 MB
• A phone photo is 2–5 MB
• A JS bundle should stay under 1 MB

Precision

The factor 0.001 is exact by international agreement, not a rounded approximation. Any imprecision in a result comes from your input, not the conversion.

Watch Out For

• This converter uses decimal (1 KB = 1,000 bytes), which is what drive manufacturers and networks use. Windows reports binary, which is why a "1 TB" drive shows as 931 GB.

In Code

`javascript const kilobyteToMegabyte = (value) => value * 0.001; ``

Where This Conversion Comes Up

• Computing
• Storage
• Internet
• Media
• Backups

How Many Decimals Do You Need?

Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 KB with the factor truncated at each decimal place:

Decimals kept	Factor	137 KB becomes	Error
0	0	0	100.0000%
1	0	0	100.0000%
2	0	0	100.0000%
3	0.001	0.137	—
4	0.001	0.137	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured kilobytes to three significant figures, the answer in megabytes is only good to three — writing more digits claims precision the measurement never had.