Gigabytes to Megabytes (GB to MB)
1 GB = 1,024 MB. Multiply gigabytes by 1,024; the box below does it both ways.
1 GB = 1,024 MB · megabytes to gigabytes page
How to convert gigabytes to megabytes
- Take the value in gigabytes.
- Multiply by 1,024 (because 1 GB = 1,024 MB).
- Example: 1 GB × 1,024 = 1,024 MB.
- Going back: divide by 1,024, or multiply by 0.00097656.
Where this comes up
Multiply by 1024. A 1.5 GB daily pack is 1536 MB; a 64 GB phone is 65,536 MB of nominal storage, of which the OS keeps 8–12 GB. Decimal: multiply by 1000.
| GB | MB |
|---|---|
| 0.1 | 102.4 |
| 0.25 | 256 |
| 0.5 | 512 |
| 1 | 1,024 |
| 1.5 | 1,536 |
| 2 | 2,048 |
| 3 | 3,072 |
| 4 | 4,096 |
| 8 | 8,192 |
| 16 | 16,384 |
| 32 | 32,768 |
| 64 | 65,536 |
| 128 | 1,31,072 |
| 256 | 2,62,144 |
Questions people ask
How many megabytes are in 1 gigabyte?
1 GB = 1,024 MB. To convert, multiply the gigabyte value by 1,024.
What is 4 GB in MB?
4 GB is 4,096 MB.
How do I convert megabytes back to gigabytes?
Divide by 1,024, or multiply by 0.00097656: 1 MB = 0.00097656 GB.
Why do some converters give a slightly different answer?
Two conventions exist. Operating systems and this page use binary units (1 MB = 1024 KB, 1 GB = 1024 MB). Storage and telecom sellers use decimal (1 MB = 1000 KB), which makes the same file look about 2–7% smaller.
More data size conversions
Megabytes to Gigabytes (MB to GB) · KB to MB · MB to KB · all converters
Factors are the exact international definitions (binary: 1 MB = 1024 KB); last checked 2026-10-10.