How to Convert Megabytes to Gigabytes (MB to GB)
Data conversions explain why a 1 TB drive shows less space on your computer and help compare mobile plans sold in gigabytes. This guide shows how to convert megabytes into gigabytes by hand, with examples and a quick-reference table.
The conversion
To convert megabytes to gigabytes, multiply the value by 0.001. To go the other way, divide by the same number (or multiply by 1,000). For a quick estimate, multiply by about 0.001.
Gigabytes = megabytes × 0.001
Worked examples
- 3 MB = 0.003 GB
- 12.5 MB = 0.0125 GB
- 75 MB = 0.075 GB
Megabytes to Gigabytes table
| Megabytes | Gigabytes |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
| 250 MB | 0.25 GB |
| 500 MB | 0.5 GB |
| 1,000 MB | 1 GB |
Common questions
Is MB to GB exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Gigabytes to Megabytes converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For any value, use the Megabytes to Gigabytes Converter or browse all data storage converters.
Run your own numbers: Megabytes to Gigabytes Converter