How many Kilobytes (KB) are in 1 Megabyte (MB)?

In standard binary data measurement (used by Windows and RAM), 1 Megabyte (MB) = 1,024 Kilobytes (KB). In decimal system (SI units used by storage drive manufacturers), 1 MB = 1,000 KB.

How many KB is 20 MB?

20 Megabytes (MB) equals 20,480 Kilobytes (KB) in binary measurement (20 × 1024), and 20,000 Kilobytes in decimal measurement.

What is the formula to convert MB to KB?

To convert Megabytes to Kilobytes in binary: multiply the number of Megabytes by 1,024 (KB = MB × 1024). To convert in decimal: multiply by 1,000 (KB = MB × 1000).

MB to KB ConverterConverters

Convert Megabytes (MB) to Kilobytes (KB) using binary standards.

Local-first

Megabytes (MB)

Presets:

Kilobytes (KB)

Decimals:

1,024

Formula: 1 Megabytes (MB) = 1,024 Kilobytes (KB)

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What it accepts, how to use it, and where your input is processed.

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Megabytes (MB) and Kilobytes (KB) are digital information storage units. Converting between them is essential for file compression, email attachment limits, hosting uploads, and cellular bandwidth monitoring.

Binary System (Windows / OS / Memory)

1 MB = 1,024 KB (2¹⁰)

Used by Windows file explorer, RAM memory, and operating systems calculating power-of-two bytes.

Decimal SI System (Storage Drives / Networking)

1 MB = 1,000 KB (10³)

Used by hard drive manufacturers (SSDs, USB flash drives) and telecommunications networks.

Quick MB to KB Conversion Table

Megabytes (MB)	Binary (1024)	Decimal (1000)
0.5 MB	512 KB	500 KB
1 MB	1,024 KB	1,000 KB
2 MB	2,048 KB	2,000 KB
5 MB	5,120 KB	5,000 KB
10 MB	10,240 KB	10,000 KB
20 MB	20,480 KB	20,000 KB
50 MB	51,200 KB	50,000 KB
100 MB	102,400 KB	100,000 KB