How to convert megabytes to gigabytes
One megabyte equals 0.001 gigabytes. To convert, multiply the number of megabytes by 0.001 (or divide by 1,000):
Mental-math shortcut: Divide megabytes by 1,000 (the decimal convention used by phones and drive makers). If your computer counts in binary units, divide by 1,024 instead — see the MiB and GiB rows.
Example
Convert 500 megabytes to gigabytes: 500 MB × 0.001 = 0.5 GB.
Megabytes to Gigabytes conversion chart
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 512 | 0.512 |
| 750 | 0.75 |
| 1,000 | 1 |
| 1,024 | 1.024 |
| 1,500 | 1.5 |
| 2,000 | 2 |
| 2,048 | 2.048 |
| 4,096 | 4.096 |
| 5,000 | 5 |
| 10,000 | 10 |
What is a megabyte?
A megabyte (MB) is 1,000,000 bytes, or 1,000 kilobytes, in the decimal system. In the binary convention used by Windows, a "megabyte" means 1,048,576 bytes (a mebibyte, MiB). A smartphone photo is typically 2–5 MB, and a minute of MP3 music is about 1 MB.
What is a gigabyte?
A gigabyte (GB) is 1,000 megabytes, or one billion bytes, in the decimal system that phone makers, drive makers and mobile carriers use. Windows counts a "gigabyte" as 1,024³ bytes (a gibibyte, GiB), which is why a 256 GB drive shows up as about 238 GB.
Converting the other way? Use the Gigabytes to Megabytes converter.
Frequently asked questions
How many gigabytes is one megabyte?
One megabyte is 0.001 gigabytes.
How do I convert megabytes to gigabytes?
Multiply the value in megabytes by 0.001. For example, 500 MB × 0.001 = 0.5 GB.
What is 1,024 MB in gigabytes?
1,024 MB is 1.024 gigabytes.
How do I convert gigabytes to megabytes?
Multiply gigabytes by 1,000 (or divide by 0.001). You can also use our Gigabytes to Megabytes converter.
Is 1 GB 1,000 MB or 1,024 MB?
Both conventions exist. In the decimal (SI) system used by storage makers, phones, macOS and mobile data plans, 1 GB = 1,000 MB. Windows uses binary units, where 1 "GB" = 1,024 "MB" — strictly speaking, 1 GiB = 1,024 MiB.
Conversions use the internationally agreed definitions of each unit (for example, 1 inch = 2.54 cm exactly) and are rounded for display. Volume converters use US customary units unless stated otherwise.
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