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Convert gigabytes to megabytes instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert gigabytes to megabytes
Multiply the value by 1024.
MB = GB × 1024Example: 10 GB = 10240 MB.
Gigabytes to Megabytes conversion table
| Gigabytes (GB) | Megabytes (MB) |
|---|---|
| 1 GB | 1024 MB |
| 2 GB | 2048 MB |
| 3 GB | 3072 MB |
| 4 GB | 4096 MB |
| 5 GB | 5120 MB |
| 10 GB | 10240 MB |
| 15 GB | 15360 MB |
| 20 GB | 20480 MB |
| 25 GB | 25600 MB |
| 50 GB | 51200 MB |
| 100 GB | 102400 MB |
Frequently asked questions
How many megabytes is 1 gigabyte?
1 gigabyte equals 1024 megabytes.
What is the formula to convert GB to MB?
To convert GB to MB, multiply the value by 1024. The full formula is: MB = GB × 1024.
How do I convert megabytes back to gigabytes?
Use the same calculator above and type your value into the megabytes field instead — it converts in both directions. Or use the reverse formula: GB = MB ÷ 1024.
Is the GB to MB conversion exact?
The conversion factor used here (1024) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.