Why are my speed readings so high?
Before you start investigating, make sure that you're consistent in comparing your units. Many programs, such as download clients, will report speeds in terms of kiloBytes per second. Here on Speedtest,net, we default to the industry-standard megabits. For example: 100 kilobytes per second works out to 0.8 megabits per second. You can have Speedtest.net do the calculations for you by changing the units on your Settings page.
What does "Latency Test Error" mean?
Why does the download test work, but not the upload test?