80 Mbps plan
- Input
- 80 Mbps
- Expected output
- 10 MB/s
80 ÷ 8 = 10. A 1 GB file takes 100 seconds at that ceiling.
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Mbps vs MB/s difference
Your plan says 100 and the browser shows a bit over 12. Nothing is broken: the plan is in megabits per second (Mbps), the download is measured in megabytes per second (MB/s), and 1 byte is 8 bits. The calculator below shows both units side by side.
80 ÷ 8 = 10. A 1 GB file takes 100 seconds at that ceiling.
400 ÷ 8 = 50. An 8 GB movie takes 160 seconds at that ceiling.
800 ÷ 8 = 100. A 50 GB file takes 500 seconds at that ceiling.
25 × 8 = 200. For the reverse direction, use the calculator's Required speed mode.
At 100 Mbps, 80 seconds if the connection delivers its full speed; at 50 Mbps, 160 seconds; at 1 Gbps, 8 seconds. At 90% efficiency and 100 Mbps it would be about 89 seconds. In practice the origin server and Wi-Fi are usually the limit.
No. Mbps is megabits per second and MB/s is megabytes per second. A megabyte has 8 megabits, so 8 Mbps equals 1 MB/s.
It is a historical telecom convention, which counts bits transmitted per second. The practical effect is that the plan number looks 8 times larger than the speed you see in the download.
TCP and IP headers (the theoretical Ethernet ceiling is about 95%), Wi-Fi quality, the server speed limit, peak hours and the disk itself. Measure with a speed test and compare.
1 MB = 1,000,000 bytes, as on drives and most download pages. Mbps is always decimal.
ISPs sell speed in bits per second (Mbps). Files and browsers measure in bytes (MB). Since 1 byte is 8 bits, a download moves at one eighth of the advertised number: 100 Mbps delivers at most 12.5 MB/s.
Your speed: 100 Mbps equals 12.5 MB/s.
size in bits ÷ effective speed: 400,000,000,000 bit ÷ 100,000,000 bit/s = 4,000 s
Time to download each example, at 100% efficiency and the chosen byte base. Tap a name to calculate it.
| Example | 50 Mbps | 100 Mbps | 300 Mbps | 500 Mbps | 1 Gbps |
|---|---|---|---|---|---|
| 5 GB | 13 min 20 s | 6 min 40 s | 2 min 13 s | 1 min 20 s | 40 s |
| 8 GB | 21 min 20 s | 10 min 40 s | 3 min 33 s | 2 min 8 s | 1 min 4 s |
| 50 GB | 2 h 13 min 20 s | 1 h 6 min 40 s | 22 min 13 s | 13 min 20 s | 6 min 40 s |
| 60 GB | 2 h 40 min | 1 h 20 min | 26 min 40 s | 16 min | 8 min |
| 100 GB | 4 h 26 min 40 s | 2 h 13 min 20 s | 44 min 27 s | 26 min 40 s | 13 min 20 s |
| 1,000 GB | 1 d 20 h 26 min | 22 h 13 min 20 s | 7 h 24 min 27 s | 4 h 26 min 40 s | 2 h 13 min 20 s |
Sizes are round examples, not measurements: games, movies and ISO images vary a lot.
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