Kilobytes to Megabytes Converter (kB to MB)
1 kB = 0.001 MB in decimal units. Convert kilobytes to megabytes for photo uploads, attachments and web pages, with kB to MB and MB to kB charts.
Megabyte (MB) = Kilobyte (kB) × 0.001
Kilobyte (kB): A kilobyte is 1,000 bytes under decimal prefix conventions. This converter treats kB and KB as bytes, and kb as bits. Some software uses KB for 1,024 bytes; that amount is a kibibyte (KiB).
Megabyte (MB): A megabyte (MB) is 1,000,000 bytes (10^6), or eight megabits. The binary amount 1,048,576 bytes is a mebibyte (MiB), not a decimal megabyte.
| Kilobyte (kB) | Megabyte (MB) |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
Small files are measured in kilobytes: compressed photos, PDFs of a page or two, icons and short audio clips. Upload forms and email systems usually state their limits in megabytes or in kB, so converting between the two tells you whether a file will be accepted before you try. In decimal units 1 MB is exactly 1,000 kB.
Windows File Explorer and some older programs write KB for 1,024 bytes, properly a kibibyte (KiB). At this scale the difference is 2.4%, enough to matter when a limit is tight: a photo shown as 236 KB in Explorer holds 241,664 bytes, about 241.7 kB in decimal units, so whether it passes a 240 kB limit depends on which kilobyte the form counts.
How to use this tool
- Type a value in the Kilobyte box to see it in megabytes, or type in the Megabyte box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Digital Storage converter.
Formula
Megabyte (MB) = Kilobyte (kB) × 0.001
Kilobyte (kB) = Megabyte (MB) × 1000
Both factors come from exact definitions: 1 megabyte = 1000 kilobytes and 1 kilobyte = 0.001 megabytes (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
240 kB × 0.001 = 0.24 MB
1.5 MB × 1000 = 1500 kB
Kilobyte to Megabyte chart
Common values from kilobytes to megabytes, rounded to four decimal places.
| Kilobyte (kB) | Megabyte (MB) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 64 | 0.064 |
| 100 | 0.1 |
| 128 | 0.128 |
| 150 | 0.15 |
| 200 | 0.2 |
| 240 | 0.24 |
| 256 | 0.256 |
| 300 | 0.3 |
| 400 | 0.4 |
| 500 | 0.5 |
| 512 | 0.512 |
| 600 | 0.6 |
| 750 | 0.75 |
| 800 | 0.8 |
| 1,000 | 1 |
| 1,500 | 1.5 |
| 2,000 | 2 |
| 5,000 | 5 |
| 10,000 | 10 |
Megabyte to Kilobyte chart
The reverse direction for values people often look up.
| Megabyte (MB) | Kilobyte (kB) |
|---|---|
| 0.01 | 10 |
| 0.05 | 50 |
| 0.12 | 120 |
| 0.24 | 240 |
| 0.6 | 600 |
| 1.2 | 1,200 |
| 2.4 | 2,400 |
| 3.5 | 3,500 |
| 6 | 6,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 100 | 100,000 |
Small files measured in kilobytes
| Item | Kilobyte (kB) | Megabyte (MB) |
|---|---|---|
| One SMS text message, maximum payload | 0.14 | 0.0001 |
| 1,000 characters of plain ASCII text | 1 | 0.001 |
| Largest QR code in byte mode (2,953 bytes) | 2.953 | 0.003 |
| Commodore 64 memory (64 KiB) | 65.536 | 0.0655 |
| US visa application photo, maximum file size | 240 | 0.24 |
| One minute of 128 kbps MP3 audio | 960 | 0.96 |
Quick mental estimate
Divide by 1,000 by moving the decimal point three places left: 960 kB → 0.96 MB. For binary KiB to MiB, divide by 1,024 instead, which gives a result about 2.3% smaller.
Use the converter or the charts when the exact figure matters.
The two units
Kilobyte (kB): A kilobyte is 1,000 bytes under decimal prefix conventions. This converter treats kB and KB as bytes, and kb as bits. Some software uses KB for 1,024 bytes; that amount is a kibibyte (KiB).
Megabyte (MB): A megabyte (MB) is 1,000,000 bytes (10^6), or eight megabits. The binary amount 1,048,576 bytes is a mebibyte (MiB), not a decimal megabyte.
Frequently asked questions
How many KB are in 1 MB?
Exactly 1,000 kB in decimal units. In binary units, 1 MiB is 1,024 KiB.
What is the file size limit for a US visa photo?
The State Department's digital photo rules for visa applications set a maximum of 240 kB, which is 0.24 MB. A photo straight from a phone camera is usually several megabytes and needs resizing or compressing first.
Is kb the same as kB?
No. A lowercase b means bits, so a kilobyte holds 8 kilobits. Network speeds are counted in bits and file sizes in bytes. A 128 kbps audio stream, for example, moves 16 kB of data each second.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/kilobyte-to-megabyte-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Kilobytes to Megabytes Converter (kB to MB). https://kakao.mobile/tools/kilobyte-to-megabyte-converter/
“Kilobytes to Megabytes Converter (kB to MB).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/kilobyte-to-megabyte-converter/.
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