GB to MB
One GB equals 1000 MB. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| GB | MB |
|---|---|
| 1 GB | 1000 MB |
| 2 GB | 2000 MB |
| 3 GB | 3000 MB |
| 5 GB | 5000 MB |
| 10 GB | 10000 MB |
| 15 GB | 15000 MB |
| 20 GB | 20000 MB |
| 25 GB | 25000 MB |
| 50 GB | 50000 MB |
| 100 GB | 100000 MB |
| 500 GB | 500000 MB |
| 1000 GB | 1000000 MB |
How to use
- Enter the number of GB in the field.
- The result in MB updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: MB = GB × 1000. Going back the other way, one MB is 0.001 GB.
Decimal and binary units are not the same
Storage is sold in decimal units — a kilobyte is 1000 bytes — while operating systems often count in binary, where a kibibyte is 1024. That is the whole reason a “500 GB” drive shows up as roughly 465 GiB in the system.
MB = GB × 1000
Frequently asked questions
How many MB are in one GB?
One GB is 1000 MB.
How do I convert GB to MB?
Multiply by the factor: MB = GB × 1000.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert MB back to GB?
One MB is 0.001 GB — or open the reverse page linked below.