Data Transfer Rate Converter

Convert data transfer rate values among common SI, metric and customary units. Data transfer rate measures information moved per time. This converter distinguishes bits from bytes and decimal prefixes from binary prefixes.

ValueEnter zero or a positive value; scientific notation is accepted.Convert fromBit per second (bit/s)Kilobit per second (kbit/s)Megabit per second (Mbit/s)Gigabit per second (Gbit/s)Byte per second (B/s)Kilobyte per second (kB/s)Megabyte per second (MB/s)Gigabyte per second (GB/s)Kibibyte per second (KiB/s)Mebibyte per second (MiB/s)Convert toBit per second (bit/s)Kilobit per second (kbit/s)Megabit per second (Mbit/s)Gigabit per second (Gbit/s)Byte per second (B/s)Kilobyte per second (kB/s)Megabyte per second (MB/s)Gigabyte per second (GB/s)Kibibyte per second (KiB/s)Mebibyte per second (MiB/s)

Convert

Converted value12.5 MB/s

SI-base value100000000 bit/s

Multiply by0.125

The displayed results apply to the default example. Enable JavaScript to convert other values.

How to use this converter

1. Enter the data transfer rate value.
2. Select its current unit and the unit you want.
3. Select Convert. The page shows the converted value, the SI-base value and the direct multiplication factor.

Conversion formula

Converted value = entered value × source-to-SI factor ÷ target-to-SI factor.

Every option is represented by its factor to bit per second (bit/s). This one-base method keeps reciprocal conversions consistent. Calculations run in your browser, and old results are hidden when an input changes or validation fails.

Worked example

Convert 100 Mbit/s to MB/s. Multiply by 0.125; the result is 12.5 MB/s. The same input equals 100000000 bit/s in the SI-base unit.

Accuracy and limitations

Advertised link rate is not the same as application throughput. Protocol overhead, congestion, latency, storage and Wi-Fi conditions can reduce observed speed.

The calculator retains more digits internally than it displays. Round the final value to the precision supported by your measurement. Very large and very small answers may use scientific notation.

Frequently asked questions

Why is 100 Mbit/s not 100 MB/s?

A byte contains eight bits, so 100 Mbit/s equals 12.5 MB/s before overhead.

Can I reverse the conversion?

Yes. Swap the From and To selections. Because both units use the same SI base, the reverse factor is the reciprocal of the forward factor.

Why was my entry rejected?

Use digits with an optional decimal point or scientific notation. Blank values, commas, fractions, words and non-finite entries are rejected. Negative values are rejected because this converter treats the quantity as a magnitude.

Review notes and sources

Reviewed October 4, 2026. The conversion factors, default example, zero or signed boundary behavior, invalid-input handling and recovery after an error were checked. Factors follow SI definitions and published conversion guidance from the NIST Guide to the SI and the BIPM SI Brochure. Explanations and examples are original.

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