What is the difference between Mbps and MB/s?

Mbps is megabits per second (lowercase b), the unit ISPs use to advertise speed. MB/s is megabytes per second (capital B), the unit your file manager shows during a download. Since 1 byte = 8 bits, MB/s = Mbps divided by 8.

Why does a 100 Mbps connection only download at 12.5 MB/s?

It is not slower — it is the same speed in different units. 100 megabits per second equals 100 / 8 = 12.5 megabytes per second. Real downloads are a little lower again because of protocol overhead.

Is my speed data sent anywhere?

No. The converter is privacy-first and runs entirely in your browser — nothing you type is uploaded or stored.

How do I convert 50 Mbps to MB/s?

Divide by 8: 50 ÷ 8 = 6.25 MB/s. A 50 Mbps connection downloads at a theoretical maximum of 6.25 megabytes per second.

Why is my real download slower than the calculated MB/s?

Protocol overhead (TCP/IP headers, encryption, retransmissions) plus server-side limits typically cost 5-15%. The converter shows the theoretical ceiling; real-world throughput sits a little below it.

How long to download a 4 GB file on 100 Mbps?

100 Mbps = 12.5 MB/s. A 4 GB (4000 MB) file takes 4000 ÷ 12.5 = 320 seconds, about 5 minutes 20 seconds at full speed.

Mbps to MB/s Converter

Internet plans are advertised in megabits per second (Mbps), but your browser and file manager report downloads in megabytes per second (MB/s). This converter bridges the two so you can tell what download speed a quoted line rate actually delivers.

How it works

A byte is eight bits, so the two units differ by exactly a factor of eight:

MB/s = Mbps ÷ 8 · Mbps = MB/s × 8

The conversion is exact and bidirectional — type a value in either unit and the other updates instantly. Real downloads run slightly below this ceiling because of protocol overhead.

Example

A 100 Mbps broadband plan downloads at 100 ÷ 8 = 12.5 MB/s at full speed, and a 1 Gbps (1000 Mbps) line at 125 MB/s.

Line rate (Mbps)	Download (MB/s)
25 Mbps	3.125 MB/s
50 Mbps	6.25 MB/s
100 Mbps	12.5 MB/s
500 Mbps	62.5 MB/s
1000 Mbps	125 MB/s

All maths runs locally in your browser, with nothing sent anywhere.