Mbps to MB/s Converter
100 Mbps = 12.5 MB/s
Internet speeds are sold in megabits per second (Mbps), but downloads show megabytes per second (MB/s). Because one byte is eight bits, divide Mbps by 8 to get MB/s — or use the converter below.
Quick reference
| Mbps | MB/s |
|---|---|
| 10 Mbps | 1.25 MB/s |
| 25 Mbps | 3.1 MB/s |
| 50 Mbps | 6.25 MB/s |
| 100 Mbps | 12.5 MB/s |
| 300 Mbps | 37.5 MB/s |
| 500 Mbps | 62.5 MB/s |
| 1,000 Mbps (1 Gbps) | 125 MB/s |
MB/s = Mbps ÷ 8. Mbps = MB/s × 8.
Why two units?
Networks have always counted in bits, because data travels one bit at a time. Storage counts in bytes. Providers advertise in Mbps, while browsers and game launchers show download progress in MB/s — so the same speed looks eight times smaller in a download window. Neither number is wrong; they measure the same thing in different units.
Mb vs. MB
A lowercase b means bits, an uppercase B means bytes. "Mbps" and "Mb/s" are megabits per second; "MBps" and "MB/s" are megabytes per second. Kilo (k), mega (M) and giga (G) mean thousand, million and billion, and the divide-by-8 rule works at every scale: 8 Kbps is 1 KB/s, 8 Mbps is 1 MB/s, 8 Gbps is 1 GB/s.
Common speeds converted
A 50 Mbps plan downloads at up to 6.25 MB/s; 100 Mbps at 12.5 MB/s; 300 Mbps at 37.5 MB/s; 500 Mbps at 62.5 MB/s; and 1 Gbps at 125 MB/s. In practice, expect a little less — network overhead and the server's own speed take a share. On a gigabit cable, 110–117 MB/s is a great real-world result.
Is my download slow?
Multiply the MB/s figure in your download window by 8 and compare it with your plan. A game store showing 11 MB/s on a 100 Mbps plan is using 88 Mbps — close to the maximum. If the converted figure is far below your plan, run a speed test. If the test is fast but downloads are slow, the download server is the likely limit, not your connection. Why is my internet slow covers the other causes.
The 1,000 vs. 1,024 question
Network speeds use decimal units, where a megabit is exactly a million bits. Some operating systems show file sizes in binary units, where a "megabyte" is 1,048,576 bytes. The difference is about 5 % at mega and 7 % at giga — small next to the factor of eight, but it's another reason a download can look a little slower than expected.
Router figures aren't internet speed
The large number on a router box — "AX3000", "1,200 Mbps" — is the theoretical Wi-Fi link rate, not your internet speed. Real throughput is always lower. Use a speed test to see what you actually get.
Related tools
To see how long a file will take, use the download time calculator. The speed test also has an Mbps / MB/s toggle, so you can read your result in either unit. For the full explanation, read Mbps vs MBps and is 100 Mbps fast.