Use the Mbps converter for a rate per second. Use MB to GB for a storage amount. One answers how fast; the other changes the unit of a capacity.
One byte is 8 bits. Decimal MB and GB are 10⁶ and 10⁹ bytes. Binary MiB and GiB are 2²⁰ and 2³⁰ bytes; mega/giga are decimal prefixes, while mebi/gibi name binary multiples.
| Mbps converter | MB to GB converter | |
|---|---|---|
| Inputs | Nonnegative Mbps | Nonnegative amount, direction, decimal/binary standard |
| Primary | MB/s, up to 4 decimals | GB/GiB up to 6 decimals; reverse MB/MiB up to 2 |
| Details | kbps, Gbps, Mbps, ideal GB/hour | Factor, decimal GB and binary GiB views of the same bytes |
| Default | 100 Mbps → 12.5 MB/s | 2500 MB → 2.5 GB |
100 Mbps ÷ 8 = 12.5 MB/s. Holding that rate for 3600 seconds gives 45 decimal GB in an hour before transfer overhead; it is an arithmetic throughput estimate, not a delivered-speed guarantee.
Decimal and binary modes
2500 MB = 2.5 GB, or approximately 2.328306 GiB for the same bytes. In binary mode, 2500 MiB ÷ 1024 = 2.441406 GiB. These differ because the source MB and MiB each denote a different byte count.
The direction controls retain the MB-to-GB and GB-to-MB labels. In binary mode, the primary result labels use MiB and GiB; the controls themselves do not relabel to those names.
Limits
Keep lowercase b for bits and uppercase B for bytes, and retain /s for rates. The capacity form has no time component. Both formats round results; neither predicts real network performance. For more unit choices, use data transfer rate or digital storage.
Sources
NIST Prefixes for binary multiples, byte, MB/MiB and GB/GiB definitions.