1 GB to MB
1 GB = 1000 MB
1 gigabyte equals 1000 megabytes.
How to convert 1 GB to MB
Use the formula MB = GB × 1000:
MB = 1 × 1000MB = 1000
So 1 GB = 1000 MB.
Rounded values and quick estimate
- Rounded to a whole number: 1,000 MB
- Rounded to one decimal place: 1,000 MB
- Conversion factor: 1 gigabyte = 1000 megabytes
This conversion is exact, so there is no need to estimate: just multiply by 1,000.
1 GB in other units
- Megabytes
- 1000 MB
- Kilobytes
- 1000000 KB
- Terabytes
- 0.001 TB
- Bits
- 8000000000 bits
- Bytes
- 1000000000 bytes
1 GB and nearby values
About gigabytes and megabytes
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”.
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.
Related conversions
Frequently asked questions
What is 1 GB in MB?
1 gigabyte is 1000 megabytes (1 GB = 1000 MB).
How do you convert 1 GB to MB?
Apply MB = GB × 1000: MB = 1 × 1000, MB = 1000.
How many gigabytes is 1000 MB?
1000 MB is about 1 gigabyte.