Convert gigabytes to megabytes
Enter a value in gigabytes (GB) to get megabytes (MB). One gigabyte is 1,000 megabytes; one megabyte is 0.001 gigabytes.
How to use the Gigabyte to megabyte
- Type the number of gigabytes.
- Click Convert.
- Read the result in megabytes, plus the same value in every other digital storage unit.
GB to MB formula
megabytes = gigabytes × 1,000. To go the other way, gigabytes = megabytes × 0.001 (see megabytes to gigabytes).
Worked example
12 GB × 1,000 = 12,000 MB.
Gigabytes to megabytes conversion table
| Gigabytes | Megabytes |
|---|---|
| 0.1 GB | 100 MB |
| 0.5 GB | 500 MB |
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 3 GB | 3,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 20 GB | 20,000 MB |
| 25 GB | 25,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
| 250 GB | 250,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
About the gigabyte
1,000 MB. Phone storage and mobile data plans.
About the megabyte
1,000,000 bytes. A typical phone photo is 2–5 MB.
Related conversions
megabytes to gigabytes · gigabytes to terabytes · gigabytes to gibibytes · any unit.
Frequently asked questions
How many megabytes in a gigabyte?
1,000 megabytes.
How many gigabytes in a megabyte?
0.001 gigabytes.
Is the factor exact?
The factor 1,000 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.