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Mbps to MB/s

Megabits per second (Mbps) to megabytes per second (MB/s).

Result12.5MB/s

Precision (significant figures)

Formula

MB/s = Mbps × 0.125

1 Mbps = 0.125 MB/s

MB/s = Mbps ÷ 8, because a byte is 8 bits. Internet plans are sold in megabits per second (Mbps) but downloads show megabytes per second (MB/s), so a 100 Mbps connection tops out at 12.5 MB/s and gigabit at 125 MB/s.

Formula

MB/s = Mbps × 0.125

Worked example

  1. Start with 100 Mbps.
  2. Multiply by 0.125 (MB/s per Mbps): 100 × 0.125 = 12.5 MB/s.

Mbps to mb/s chart

Megabits per second (Mbps)Megabytes per second (MB/s)
10.125
50.625
101.25
253.125
506.25
759.375
10012.5
15018.75
20025
30037.5
50062.5
940117.5
1,000125
2,000250
2,500312.5
10,0001,250

When you need this conversion

Checking whether your internet plan matches what downloads show, sizing uploads, streaming and backups, and comparing Wi-Fi or Ethernet speeds with disk speeds.

Quick reference

  • 10 Mbps = 1.25 MB/s
  • 25 Mbps = 3.125 MB/s
  • 50 Mbps = 6.25 MB/s
  • 100 Mbps = 12.5 MB/s
  • 300 Mbps = 37.5 MB/s
  • 1,000 Mbps = 125 MB/s

Real-world speed

TCP/IP and Wi-Fi overhead usually costs 5–10%, so a 100 Mbps plan typically shows 11–12 MB/s at best. Some apps show MiB/s (mebibytes), which is another 4.9% lower: 12.5 MB/s is 11.92 MiB/s.

Common mistakes

Reading Mbps as MB/s. The difference is a factor of 8.

Blaming the ISP for bytes vs bits. A download showing 11.8 MB/s on a 100 Mbps plan is working as sold.

For how long a file takes, use the download time calculator. For the reverse, use MB/s to Mbps.

Questions

How many MB/s is 100 Mbps?

12.5 MB/s.

How many MB/s is 1 Gbps?

125 MB/s.

Why is my download slower than my plan?

The plan is in bits, the browser shows bytes. Also expect 5–10% protocol overhead, plus Wi-Fi losses.

What's the difference between Mb and MB?

Lowercase b is bits; uppercase B is bytes. 1 MB = 8 Mb.

Sources

Last reviewed 2026-09-24. How we check values · Report a problem with this page

Further reading