Megabytes to gigabytes
1 megabyte = 0.001 gigabytes
Type a value in megabytes (MB) to get gigabytes (GB) straight away. A megabyte is smaller than a gigabyte, so the number goes down. Both units belong to data storage, measured here against the byte.
1 MB = 0.001 GB
Formula
GB = MB × 0.001
One megabyte is 0.001 gigabytes, so multiply by that factor. You can also divide by 1,000, the number of megabytes in one gigabyte. Here MB is the value in megabytes and GB is the result in gigabytes.
Worked example: 700 megabytes × 0.001 = 0.7 gigabytes.
Megabytes to gigabytes table
| 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 |
| 6 MB | 0.006 GB |
| 7 MB | 0.007 GB |
| 8 MB | 0.008 GB |
| 9 MB | 0.009 GB |
| 10 MB | 0.01 GB |
| 15 MB | 0.015 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 30 MB | 0.03 GB |
| 40 MB | 0.04 GB |
| 50 MB | 0.05 GB |
| 60 MB | 0.06 GB |
| 75 MB | 0.075 GB |
| 100 MB | 0.1 GB |
Everyday megabytes in gigabytes
| What it is | MB | GB |
|---|---|---|
| a minute of compressed MP3 (about) | 1 MB | 0.001 GB |
| a phone photo | 5 MB | 0.005 GB |
| an email attachment limit | 25 MB | 0.025 GB |
| a short HD video | 100 MB | 0.1 GB |
| a CD | 700 MB | 0.7 GB |
Quick estimate in your head
Divide by 10^3: move the decimal point 3 places left.
Watch out for
- Drive makers use decimal GB (10⁹ bytes), while Windows reports binary GiB but labels it GB. A 256 GB drive shows about 238 'GB'.
About the units
Megabyte (MB). 1,000,000 bytes (decimal). Windows shows MiB values but labels them MB.
Gigabyte (GB). 1,000,000,000 bytes (decimal). Phone storage and data plans are sold in GB.
Going the other way, 1 gigabyte is 1,000 megabytes.
Questions
How many gigabytes are in 1 megabyte?
1 megabyte is 0.001 gigabytes, and 1 gigabyte is 1,000 megabytes.
How do I convert megabytes to gigabytes?
Use GB = MB × 0.001. For example, 700 megabytes × 0.001 = 0.7 gigabytes.
Why does my drive show less space than advertised?
Makers use decimal units (1 GB = 10⁹ bytes) while many operating systems count in binary (1 GiB = 2³⁰ bytes). A 1 TB drive therefore shows about 931 GiB.
How much is a CD in gigabytes?
700 MB is 0.7 GB.
Source for the conversion factor: NIST: prefixes for binary multiples (IEC 80000-13).
Related conversions
- gigabytes to megabytes
- gigabytes to terabytes
- terabytes to gigabytes
- megabytes to kilobytes
- gigabytes to gibibytes
- gibibytes to gigabytes