MB to KB Converter

One megabyte (1000 kb) equals 1000 kilobyte (1000 b)s (KB). To convert megabyte (1000 kb)s to kilobyte (1000 b)s, multiply by 1000; to go back the other way, multiply by 0.001 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What megabyte (1000 kb)s and kilobyte (1000 b)s actually measure

Megabyte (1000 KB) (MB) — A megabyte is a million bytes in decimal terms. Photos, documents and mobile data allowances.

Kilobyte (1000 B) (KB) — A kilobyte is 1,000 bytes in the decimal convention used by drive manufacturers. Small files, and storage capacity as advertised.

MB to KB conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert megabyte (1000 kb)s to kilobyte (1000 b)s by hand

Multiply the number of megabyte (1000 kb)s by 1000.

For example, 25 MB × 1000 = 25000 KB.

Going the other way, divide by 1000 — or multiply by 0.001, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.