Digital storage converters
Decimal GB = 1,000 MB, whereas binary GiB = 1,024 MiB. Choose an exact direction below, or open the universal converter for all compatible units.
Example digital storage conversions
Start with a calculated reference value, then open the tool to enter your own measurement. Results marked ≈ are rounded for display.
- Gigabytes to Megabytes1 GB = 1,000 MB
Understanding digital storage
Decimal prefixes versus binary prefixes
One GB (gigabyte) is 1,000,000,000 bytes, while one GiB (gibibyte) is 1,073,741,824 bytes. Many operating systems report binary quantities with different labels.
How to verify a conversion
Do not assume GB and GiB are the same unit. A conversion of storage size does not estimate file compression or filesystem overhead.
Source definitions: NIST Guide to the SI. See our conversion methodology for calculation and rounding details.
Accurate calculations, no guesswork
Every converter uses consistent unit definitions and returns an interactive result you can verify. For multiple measurements, use the batch converter.
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