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Gigabytes to Megabytes Converter GB → MB

1 gigabyte (GB) = 1000 megabytes (MB). Type a value below — the conversion happens instantly, entirely on your device.

1 GB = 1000 MB

1 gigabytes = 1000 megabytes

1 × 1000 = 1000

1 GB equals 1000 MB, so multiplying by 1000 converts the value. The result describes the exact same quantity — only the measuring stick changes.
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How to convert gigabytes to megabytes

megabytes = gigabytes × 1000 — multiply the gigabyte value by 1000.

Example: 10 GB = 10,000 MB.

To convert the other way: gigabytes = megabytes ÷ 1000 — or use the dedicated MB to GB converter .

Gigabytes to Megabytes conversion table

Gigabytes (GB) Megabytes (MB)
0.1 100
0.25 250
0.5 500
1 1000
2 2000
3 3000
4 4000
5 5000
6 6000
7 7000
8 8000
9 9000
10 10,000
15 15,000
20 20,000
25 25,000
30 30,000
40 40,000
50 50,000
75 75,000
100 100,000
250 250,000
500 500,000
1000 1,000,000

About the units

What is a gigabyte?

A gigabyte (GB) is 1,000,000,000 bytes (decimal standard). Storage devices and mobile data plans are sold in gigabytes; an hour of HD streaming uses roughly 3 GB.

What is a megabyte?

A megabyte (MB) is 1,000,000 bytes (decimal standard). A smartphone photo is typically 2–5 MB; an MP3 song about 1 MB per minute.

Frequently asked questions

How many megabytes are in 1 gigabyte?

1 gigabyte (GB) = 1000 megabytes (MB).

What is the formula to convert gigabytes to megabytes?

megabytes = gigabytes × 1000 — multiply the gigabyte value by 1000.

How do I convert GB to MB without a calculator?

Multiply by 1000 for a close estimate. Exact factor: 1 GB = 1000 MB.

Is this GB-to-MB converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.

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