Gigabyte to Megabyte Converter (GB to MB)
1 gigabyte = 1,000 megabyte. On this converter the decimal (SI) prefixes are used: 1 GB is 1,000 MB.
Result
4 GB = 4,000 MB
How to convert gigabyte to megabyte
On this converter the decimal (SI) prefixes are used: 1 GB is 1,000 MB. Storage makers use this definition, but some operating systems display 1 GB as 1,024 MB, which is why drives look smaller than advertised.
Formula
MB = GB × 1,000
Worked example
4 GB × 1,000 = 4,000 MB
Gigabyte to Megabyte quick-reference table
| Gigabyte (GB) | Megabyte (MB) |
|---|---|
| 0.5 GB | 500 MB |
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 100 GB | 100,000 MB |
Real-life examples
A 4 GB phone video collection is 4,000 MB, and a 64 GB phone holds about 64,000 MB.
Frequently asked questions
How many MB are in a GB?
Using SI units, 1 GB = 1,000 MB. In the binary convention a gibibyte (GiB) is 1,024 MiB.
Why does my 500 GB drive show less?
Makers count 1 GB as 1,000,000,000 bytes, while some systems display sizes in GiB (1,073,741,824 bytes), so a 500 GB drive shows about 465 GiB.
What is 1 gigabyte in megabyte?
1 gigabyte = 1,000 megabyte (GB to MB).
What is the formula to convert GB to MB?
MB = GB × 1,000. For example, 4 GB × 1,000 = 4,000 MB.
How do I convert MB back to GB?
Use the reverse converter: 1 megabyte = 0.001 gigabyte. Check: 4,000 MB converts back to 4 GB.
Reverse conversion
Need the other direction? Megabyte to Gigabyte converter (MB to GB): 1 megabyte = 0.001 gigabyte.
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