How to convert megabytes (mb) to gigabytes (gb)
Using decimal SI prefixes, 1 GB equals 1,000 MB. In binary units, 1 GiB equals 1,024 MiB; these are different unit names.
Conversion formula
GB = MB ÷ 1,000
Reverse: MB = GB × 1,000
For example, 1 MB = 0.001 GB.
MB to GB conversion chart
Use these common reference values or the interactive calculator above for any number.
| Megabytes (MB) (MB) | Gigabytes (GB) (GB) |
|---|---|
| 1 MB | 0.001 GB |
| 100 MB | 0.1 GB |
| 500 MB | 0.5 GB |
| 1,000 MB | 1 GB |
| 1,024 MB | 1.024 GB |
| 2,500 MB | 2.5 GB |
| 5,000 MB | 5 GB |
| 10,000 MB | 10 GB |
When is this conversion useful?
Phone storage, disk sizes and internet plans can use different conventions. The labels MB and GB here use powers of 1,000, while MiB and GiB use powers of 1,024.
Capitalisation matters: MB means megabytes, whereas Mb means megabits. Eight bits make one byte, so 8 Mb equals 1 MB.
Frequently asked questions
Is 1 GB always 1024 MB?
No. In decimal units, 1 GB is 1,000 MB. Binary units use 1 GiB = 1,024 MiB.
How many GB is 500 MB?
500 MB equals 0.5 GB in decimal units.