Do not silently use 1,024
For GB to MB, the SI factor is 1,000. The 1,024 relationship belongs to GiB and MiB.
Unit converter
GB to MB Converter
Convert gigabytes to megabytes instantly. Decimal GB versus binary GiB. See the formula, worked examples and practical reference values.
How to convert GB to MB
Gigabytes to megabytes helps estimate decimal storage and transfer sizes; this page uses SI units where one gigabyte is 1,000 megabytes.
Formula: MB = GB × 1,000
Reverse formula: GB = MB × 0.001
Worked example
1 GB = 1,000 MB
- = 0.001 TB
- = 953.674316 MiB
- = 0.931323 GiB
Avoid these errors
Common mistakes
Bits and bytes differ by eight
A lowercase b usually means bits, while an uppercase B means bytes.
Useful for: Decimal file and storage sizes in megabytes.
Common GB to MB conversions
| gigabytes | megabytes |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
About the units
A gigabyte is an universal unit represented by GB. A megabyte is an universal unit represented by MB. Calculations use the same authoritative registry as the full data storage converter, retaining full precision until display.
Sources and definitions
IEC — Prefixes for binary multiples
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.