How to Convert Gibibytes to Megabytes (GiB to MB)
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 gibibytes into megabytes by hand, with examples and a quick-reference table.
The conversion
To convert gibibytes to megabytes, multiply the value by 1,073.741824. To go the other way, divide by the same number (or multiply by 0.0009313226). For a quick estimate, multiply by about 1,100.
Megabytes = gibibytes × 1,073.741824
Worked examples
- 3 GiB = 3,221.23 MB
- 12.5 GiB = 13,421.77 MB
- 75 GiB = 80,530.64 MB
Gibibytes to Megabytes table
| Gibibytes | Megabytes |
|---|---|
| 1 GiB | 1,073.74 MB |
| 2 GiB | 2,147.48 MB |
| 5 GiB | 5,368.71 MB |
| 10 GiB | 10,737.42 MB |
| 20 GiB | 21,474.84 MB |
| 25 GiB | 26,843.55 MB |
| 50 GiB | 53,687.09 MB |
| 100 GiB | 107,374.18 MB |
| 250 GiB | 268,435.46 MB |
| 500 GiB | 536,870.91 MB |
| 1,000 GiB | 1,073,741.82 MB |
Common questions
Is GiB to MB 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 Megabytes to Gibibytes 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.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
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.
For any value, use the Gibibytes to Megabytes Converter or browse all data storage converters.
Run your own numbers: Gibibytes to Megabytes Converter