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Mbps to MB/s Converter

Results update as you type. Lowercase "b" means bits; uppercase "B" means bytes.

Result

Enter a speed to see it in every unit.

Bits and bytes: the factor of 8

Internet providers sell speed in bits per second (Mbps, with a lowercase "b"). Browsers, game launchers and download managers usually show bytes per second (MB/s, with an uppercase "B"). One byte is 8 bits, so the same speed looks 8 times smaller in MB/s.

  • Mbps to MB/s: divide by 8. 100 Mbps ÷ 8 = 12.5 MB/s.
  • MB/s to Mbps: multiply by 8. 30 MB/s × 8 = 240 Mbps.
  • Prefixes are decimal: K = 1,000, M = 1,000,000 and G = 1,000,000,000. So 1 Gbps = 1,000 Mbps and 1 MB/s = 1,000 KB/s.

Common plan speeds

Maximum download speed for common internet plans
Plan speed Maximum download speed 1 GB takes at least
10 Mbps 1.25 MB/s 13 min 20 s
25 Mbps 3.13 MB/s 5 min 20 s
50 Mbps 6.25 MB/s 2 min 40 s
100 Mbps 12.5 MB/s 1 min 20 s
200 Mbps 25 MB/s 40 s
500 Mbps 62.5 MB/s 16 s
1 Gbps 125 MB/s 8 s
10 Gbps 1,250 MB/s 0.8 s

Times are the theoretical minimum at full plan speed. Real downloads are usually 10–20% slower.

Examples

  • Your provider sells a 100 Mbps plan. Divide by 8: a download can reach about 12.5 MB/s, and usually shows 10–11 MB/s once network overhead is taken off.
  • A game launcher shows 30 MB/s. Multiply by 8: you are receiving 240 Mbps.
  • A 1 Gbps fibre line tops out at 125 MB/s. Many hard drives write at around 150–200 MB/s, so a fast connection can approach a hard drive's limit.
  • An HD video stream using 5 Mbps needs 625 KB/s, so a 25 Mbps line can carry four such streams with some room left for browsing.
  • Watch the capital letter: 800 Kbps (kilobits) is only 100 KB/s (kilobytes).

Why your speed may look different

  • Network overhead: TCP/IP headers, encryption and Wi-Fi take 5–15% of the line, so the speed you see is lower than the plan speed converted.
  • Binary units: Windows and some apps show MiB/s (1 MiB = 1,048,576 bytes) but label it "MB/s". A reading of 10 "MB/s" in those apps is about 10.5 MB/s in the decimal units used here.
  • Shared lines and busy servers: other devices on your network and slow download servers both reduce the speed a single download reaches.

To see how long a specific file will take, including a realistic allowance for overhead, use the Internet Download Time Calculator.