Why does my 100 Mbps plan only download at ~12 MB/s?

Internet providers advertise speeds in megabits (Mbps). Dividing by 8 gives megabytes (MB/s), which is how operating systems display download rates. 100 Mbps ÷ 8 = 12.5 MB/s.

Is MB/s the same as MBps?

Yes — MB/s and MBps both mean megabytes per second. The lowercase "b" in Mbps stands for megabits, while uppercase "B" stands for megabytes (8× larger).

What is the exact conversion factor?

1 MB/s = 8 Mbps exactly. This is because 1 byte = 8 bits, with no rounding or approximation needed.

Does this use decimal or binary megabytes?

This converter uses decimal megabytes (1 MB = 1,000,000 bytes) as used by network equipment and storage vendors. Binary mebibytes (MiB/s) would give slightly different results.

MB/s to Mbps Converter

Name: MB/s to Mbps Converter
Availability: InStock
Author: Nham Vu

Convert megabytes per second (MB/s) to megabits per second (Mbps) — multiply by 8.

Convert Speed

Megabytes per second (MB/s)

MB/s

1 MB/s = 8 Mbps

Megabits per second (Mbps)

Mbps

Common Reference Speeds

Connection / Drive	MB/s	Mbps

Copied!

Summary

Convert megabytes per second (MB/s) to megabits per second (Mbps) — multiply by 8.

How it works

Enter a value in MB/s or Mbps — both fields update each other in real time.
The converter applies the exact factor: Mbps = MB/s × 8.
Reverse conversion uses: MB/s = Mbps ÷ 8.
Common reference speeds are listed below the inputs for quick lookup.

Use cases

Understand why a 100 Mbps internet plan delivers ~12.5 MB/s downloads.
Convert hard drive or SSD read/write speeds for bandwidth planning.
Compare network card specs (Gbps) with storage throughput (GB/s).
Translate ISP-advertised speeds into real-world download expectations.
Estimate how long a file transfer will take at a given MB/s rate.

Frequently Asked Questions

Last updated: 2026-07-24 · Reviewed by Nham Vu