Decimal and binary storage prefixes describe different quantities. Their similar names are a frequent source of confusion.
The formula
How to use it
A byte contains eight bits. Decimal kilobytes, megabytes and gigabytes use powers of 1000, as commonly used by storage manufacturers. Binary kibibytes, mebibytes and gibibytes use powers of 1024. For example, 1 GB is approximately 0.931322575 GiB. MB in this converter always means 1,000,000 bytes. Choose MiB explicitly for 1,048,576 bytes. Do not confuse MB/s with Mb/s: the first measures bytes per second and the second bits per second.
Related measurement tools
Check the result
Keep intermediate digits until the end, then round to the precision appropriate for the original measurement. Converting to a different unit does not make an imprecise measurement more accurate. Try the linked tool for a reference table and a comparison with related units.
Open converter →Definition references: NIST Guide to the SI and BIPM SI Brochure.