How to convert megabytes to gigabytes
Formula: GB = MB × 0.001
Worked example: 500 MB → 500 × 0.001 = 0.5 GB
Divide megabytes by 1,000 to get gigabytes. Storage makers, mobile carriers and macOS use these decimal units. A 4,500 MB download is 4.5 GB.
Megabytes to gigabytes conversion chart
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 3 MB | 0.003 GB |
| 4 MB | 0.004 GB |
| 5 MB | 0.005 GB |
| 8 MB | 0.008 GB |
| 10 MB | 0.01 GB |
| 16 MB | 0.016 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 32 MB | 0.032 GB |
| 50 MB | 0.05 GB |
| 64 MB | 0.064 GB |
| 100 MB | 0.1 GB |
| 128 MB | 0.128 GB |
| 250 MB | 0.25 GB |
| 256 MB | 0.256 GB |
| 500 MB | 0.5 GB |
| 512 MB | 0.512 GB |
| 1,000 MB | 1 GB |
| 1,024 MB | 1.024 GB |
What is a megabyte?
The megabyte is one million bytes. A phone photo takes 2 to 5 MB and a minute of MP3 music about 1 MB. Email attachments are often limited to 20 or 25 MB.
What is a gigabyte?
The gigabyte is one billion bytes, the usual unit for phone storage, RAM and mobile data plans. An hour of HD streaming video uses roughly 1.5 to 3 GB depending on the service and quality.