GB to MB Converter
Convert gigabytes (GB) to megabytes (MB) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
GB to MB formula
MB = GB × 1000
1 gigabyte = 1000 megabytes · 1 megabyte = 0.001 gigabytes
To convert gigabytes to megabytes, multiply the value by 1000. For example, 2 GB:
MB = 2 × 1000MB = 2000
So 2 GB = 2000 MB.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 1,000.
GB to MB conversion table
MB back to GB
The same values converted the other way, rounded for everyday use:
| Megabytes | Gigabytes |
|---|---|
| 500 MB | 0.5 GB |
| 1000 MB | 1 GB |
| 2000 MB | 2 GB |
| 4000 MB | 4 GB |
| 8000 MB | 8 GB |
| 16000 MB | 16 GB |
| 32000 MB | 32 GB |
| 64000 MB | 64 GB |
About the units
Gigabytes (GB)
A gigabyte is 1,000 megabytes (one billion bytes) as used by drive and phone makers. Windows reports sizes in gibibytes (1,024³ bytes), which is why a 1 TB drive shows about 931 “GB”.
Megabytes (MB)
A megabyte is 1,000,000 bytes (decimal). Photos and songs are typically a few megabytes. Operating systems sometimes report mebibytes (1,048,576 bytes) labelled as MB.
Frequently asked questions
How many megabytes are in a gigabyte?
One gigabyte equals 1000 megabytes.
What is 2 GB in MB?
2 GB = 2000 MB.
How do I convert MB back to GB?
Divide the megabytes by 1000. Or use the MB to GB converter.