Data Transfer Rate Converter – Mbps, Gbps & MB/s

Convert Mbps, Gbps and megabytes per second

Data transfer rate describes how much information moves in a unit of time. Internet plans and network links are usually advertised in bits per second, while browsers, backup apps and file-copy tools often report bytes per second. Enter a rate on either side and choose the labelled units; the converter updates the other field without treating a storage amount as a speed.

Megabits and megabytes are different

A lowercase b means bit and an uppercase B means byte. One byte contains exactly eight bits, so 100 Mbit/s equals 12.5 MB/s before protocol overhead or other losses. To convert Mbps to MB/s, divide by eight. To convert MB/s to Mbps, multiply by eight. Use the dedicated Mbps to MB/s converter for its formula, table and reverse link.

How fast is one gigabit per second?

One Gbit/s equals exactly 1,000 Mbit/s or 125 MB/s under decimal SI prefixes. That is a theoretical unit conversion, not a download-speed promise. A file transfer can be slower because of protocol overhead, Wi-Fi conditions, server capacity, storage performance, congestion and other limits. Use Gbps to MB/s to translate the stated line rate.

Decimal and binary rates

Decimal kbit/s, Mbit/s, Gbit/s, kB/s, MB/s and GB/s use powers of 1,000. Binary KiB/s, MiB/s and GiB/s use powers of 1,024 and are labelled explicitly. For example, 1 MiB/s is 1,048,576 bytes per second, which equals 8.388608 Mbit/s. Do not silently use 1,024 for a value labelled Mbps or MB/s.

Rate is not file size

MB/s measures megabytes transferred each second; MB by itself measures an amount of stored data. Converting a file size into a download duration also requires the sustained transfer rate. Use the data storage converter when the source value has no time component.

Practical limits and privacy

The formulas convert unit labels only. They do not run a network speed test, measure latency, predict burst behaviour or include protocol overhead. Real throughput is normally below a link's nominal rate and may change during a transfer. Results retain the stored factors before display rounding. Values are calculated locally in the browser and are not submitted with the conversion.