Convert Gigabytes to Megabytes
1 gigabyte is 1,000 MB. One gigabyte is exactly 1000 megabytes.
One gigabyte is 1000 megabytes. To convert gigabytes to megabytes, multiply by 1000; to go the other way, divide by 1000 or multiply by 0.001. The factor is exact rather than rounded: it follows from IEC 80000-13. Exactly one billion bytes.
Factor checked against the defining standard · How we check
Megabytes
1,000 MB
- Gigabytes × 1000
value * 10001,000 MB
1 gigabyte in every data unit
| Unit | Value | Exact factor |
|---|---|---|
| bytes | 1,000,000,000 B | × 1,000,000,000 |
| kilobytes | 1,000,000 kB | × 1,000,000 |
| megabytes | 1,000 MB | × 1,000 |
| gigabytes (as entered) | 1 GB | — |
| terabytes | 0.001 TB | × 0.001 |
| kibibytes | 976,562.5 KiB | × 976,562.5 |
| mebibytes | 953.6743164 MiB | × 953.674316406 |
| gibibytes | 0.9313225746 GiB | × 0.931322574615 |
Factors are entered by hand from IEC 80000-13 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert gigabytes to megabytes?
- 1.Take the measurement in gigabytes.
- 2.Multiply by 1000 — that is how many megabytes fit in one gigabyte.
- 3.To go back the other way, divide by 1000, or multiply by 0.001.
Gigabytes to megabytes conversion table
| Gigabytes | Megabytes |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 3 GB | 3,000 MB |
| 4 GB | 4,000 MB |
| 5 GB | 5,000 MB |
| 6 GB | 6,000 MB |
| 7 GB | 7,000 MB |
| 8 GB | 8,000 MB |
| 9 GB | 9,000 MB |
| 10 GB | 10,000 MB |
| 12 GB | 12,000 MB |
| 15 GB | 15,000 MB |
| 20 GB | 20,000 MB |
| 25 GB | 25,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
What are gigabytes and megabytes?
- Gigabyte (GB)
- Exactly one billion bytes. This is why a "1 TB" drive shows as roughly 931 GB in Windows: the drive is sold in decimal and displayed in binary.
- Megabyte (MB)
- Exactly one million bytes. A file manager showing a smaller number for the same file is counting in mebibytes.
Source: IEC 80000-13 — binary prefixes for information quantities
Questions people actually ask
- How many megabytes are in a gigabyte?
- 1000. Exactly one million bytes. A file manager showing a smaller number for the same file is counting in mebibytes.
- How do I convert megabytes back to gigabytes?
- Divide by 1000, or multiply by 0.001 — they are the same operation.
Other data conversions
Megabytes to gigabytes — the same conversion the other way.