This gigabytes to megabytes converter gives you the GB to MB result instantly, in your browser, with the exact ratio so you can verify it. 1 gigabyte is exactly 1,000 megabytes, and going the other way, 1 megabyte is 0.001 gigabytes. Gigabytes are a decimal storage unit as used by drive manufacturers and most operating systems; megabytes are a decimal storage unit as used by drive manufacturers and most operating systems.
To convert by hand, multiply the number of gigabytes by 1,000. For example, 10 gigabytes is 10,000 megabytes and 100 gigabytes is 1 megabytes. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
GB to MB formula
MB = GB × 1,000
1 gigabyte is exactly 1,000 megabytes. Multiply the value in gigabytes by that factor to get megabytes.
Gigabytes to Megabytes conversion table
| gigabytes | megabytes | Rounded |
|---|---|---|
| 1 GB | 1,000 MB | 1 |
| 2 GB | 2,000 MB | 2 |
| 4 GB | 4,000 MB | 4 |
| 8 GB | 8,000 MB | 8 |
| 16 GB | 16,000 MB | 16 |
| 32 GB | 32,000 MB | 32 |
| 50 GB | 50,000 MB | 5 |
| 64 GB | 64,000 MB | 64 |
| 100 GB | 1 MB | 1 |
| 128 GB | 128 MB | 128 |
| 200 GB | 2 MB | 2 |
| 256 GB | 256 MB | 256 |
| 500 GB | 5 MB | 5 |
| 512 GB | 512 MB | 512 |
| 1,000 GB | 1 MB | 1 |
| 1,024 GB | 1,024 MB | 1,024 |
| 2,000 GB | 2 MB | 2 |
| 2,048 GB | 2,048 MB | 2,048 |
| 5,000 GB | 5 MB | 5 |
| 10,000 GB | 1 MB | 1 |
Frequently asked questions
How many megabytes are in 5 gigabytes?
5 GB = 5,000 MB. Multiply 5 by 1,000, the number of megabytes in one gigabyte. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert gigabytes to megabytes?
MB = GB × 1,000. The factor comes from the definitions of the units: 1 gigabyte is exactly 1,000 megabytes. Worked example: 12 GB = 12,000 MB.
Is 30 GB the same as 30,000 MB?
Yes. 30 GB = 30,000 MB. Rounded to the nearest whole unit it is 3 MB.
How do I convert megabytes back to gigabytes?
Divide by 1,000, or multiply by 0.001: 1 megabyte is 0.001 gigabytes. The megabytes to gigabytes page linked above lists common values the other way.
Is the GB to MB conversion exact?
1 gigabyte is exactly 1,000 megabytes. The ratio is fixed by international agreement, so results are exact apart from rounding in the display.