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GB to MB Converter

Convert gigabyte to megabyte (1000 kb) instantly. 1 GB = 1000 MB, worked steps and a full reference table.

Formula
MB = GB × 1000

How to use it

  • Type the value in gigabyte — the result updates as you type.
  • Use Swap to flip the direction, or change either dropdown to convert between any two units.
  • Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.

Examples

1 GB1000 MB
5 GB5000 MB
10 GB10000 MB
100 GB100000 MB

One gigabyte equals 1000 megabyte (1000 kb)s (MB). To convert gigabytes to megabyte (1000 kb)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 gigabytes and megabyte (1000 kb)s actually measure

Gigabyte (GB) — A gigabyte is a billion bytes. Storage, downloads and phone plans.

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

GB to MB conversion table

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

GBMB
1 GB1000 MB
2 GB2000 MB
5 GB5000 MB
10 GB10000 MB
25 GB25000 MB
50 GB50000 MB
100 GB100000 MB

How to convert gigabytes to megabyte (1000 kb)s by hand

Multiply the number of gigabytes by 1000.

For example, 25 GB × 1000 = 25000 MB.

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.

Questions people ask

How many MB are in 1 GB?

1 GB equals exactly 1000 MB. Multiply any value in gigabyte by 1000 to get megabyte (1000 kb).

Is anything uploaded to a server?

No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.

Runs entirely in your browser. Nothing you type is uploaded, logged or shared.

Last updated 18 August 2026