Use case
Network, bandwidth and data volumes
Use the same unit logic for line, file size and upload limit so that figures become a reliable estimate.
Working steps
- First establish the unit of the line: Mbit/s, Gbit/s or MB/s.
- Bring the file size into the same unit family — GB, GiB or MB.
- Divide the rate by eight to get from Mbit/s to MB/s.
- Divide the file size by the rate and read the result as an order of magnitude, not a promise.
- For storage and upload limits also check whether decimal or binary arithmetic was used.
Checks
- Lower-case b means bit, upper-case B means byte.
- MB is decimal, MiB is binary — the difference at the gigabyte step is about 7.4 %.
- Nominal bandwidth describes the line, not the actual transfer.
Unit family: Data rate
Matching conversions
Megabit per second to Megabyte per secondMbit/s → MB/sData rateMegabyte per second to Megabit per secondMB/s → Mbit/sData rateGigabit per second to Gigabyte per secondGbit/s → GB/sData rateGigabyte to GibibyteGB → GiBDataMegabyte to GibibyteMB → GiBDataGibibyte to MegabyteGiB → MBData
Further reading
TableBandwidth: Mbit/s in MB/sTableData volumes: binary versus decimalGuideReading internet speed correctlyGuideComparing data volumes
Sources
Do not use as the sole basis for official, medical, safety-critical or contractual decisions.
Citation note: UnitCloud, use case, sources reviewed: September 2026. Source basis: BIPM SI Brochure · IEC 80000-13.