Exact bit-to-byte ratio
Uses eight bits per byte for the primary conversion.
Enter an internet or network speed in megabits per second to calculate the theoretical transfer rate in megabytes per second and related byte-based units.
Megabytes per second (MB/s) = megabits per second (Mbps) ÷ 8, because one byte contains eight bits.
Uses eight bits per byte for the primary conversion.
Also shows decimal kB/s and an approximate binary GiB/s rate.
Explains why real throughput is lower than theoretical capacity.
Internet plans and network links are usually advertised in megabits per second, written Mbps with a lowercase b. File downloads and storage applications often report megabytes per second, written MB/s with an uppercase B. Since one byte contains eight bits, divide Mbps by eight to obtain the theoretical MB/s rate. For example, 800 Mbps equals 100 MB/s before overhead.
The result is a unit conversion, not a guaranteed speed test. Actual transfer rates can be lower because network protocols add headers and acknowledgements, Wi-Fi conditions fluctuate, servers enforce limits, routes become congested, and storage devices need time to read or write data. Multiple devices and background traffic also share available capacity.
Network prefixes are commonly decimal: one megabit is 1,000,000 bits and one megabyte is 1,000,000 bytes. Some operating systems display file sizes with binary units or label them inconsistently, so observed numbers may differ even when the underlying byte count is the same.
| Input | What it means | Planning note |
|---|---|---|
| 100 Mbps | 12.5 MB/s theoretical | A 1 GB decimal file takes at least about 80 seconds before overhead. |
| 500 Mbps | 62.5 MB/s theoretical | Actual Wi-Fi throughput depends strongly on signal and equipment. |
| 1,000 Mbps | 125 MB/s theoretical | Often marketed as 1 Gbps service. |
| 2,500 Mbps | 312.5 MB/s theoretical | Endpoints and storage must support the higher rate. |
Translate advertised line speed into a familiar file-transfer rate.
Compare link capacity with storage and server throughput.
Use MB/s to estimate ideal file transfer duration.
100 Mbps divided by eight equals 12.5 MB/s theoretically.
One byte contains eight bits, so a byte-per-second rate is one eighth of the equivalent bit-per-second rate.
The conversion shows theoretical capacity. Protocol overhead, congestion, Wi-Fi, server limits, and device performance reduce actual throughput.
No. Mbps means megabits per second; MB/s means megabytes per second. The uppercase B represents bytes.
Last reviewed: August 11, 2026. Results use decimal network units unless a tool explicitly states otherwise.
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