Question 1

How is download time calculated?

Accepted Answer

Download time equals file size divided by connection speed. For example, a 1 GB file at 100 Mbps (12.5 MB/s) takes about 80 seconds. Remember that 1 byte = 8 bits, so Mbps must be divided by 8 to get MB/s.

Question 2

What is the difference between Mbps and MB/s?

Accepted Answer

Mbps (megabits per second) measures network speed and is used by ISPs. MB/s (megabytes per second) measures file transfer speed. Since 1 byte = 8 bits, 100 Mbps equals 12.5 MB/s.

Question 3

Why is my actual download slower than my plan?

Accepted Answer

ISPs advertise speeds in megabits, not megabytes. Wi-Fi overhead, network congestion, server limits and protocol overhead typically reduce real-world throughput to 70-90% of the advertised speed.