Knowledge Base & Guides
Internet Speed Guides
Practical, in-depth guides on internet speed — what each metric means, what you actually need, and how to diagnose connection problems. Built by the team behind SpeedFast.
Understanding Your Results
What each number in a speed test means and what counts as good.
Latency & Responsiveness
The metrics that determine how your connection feels — beyond raw speed.
Speed for Specific Activities
How much speed, ping, and jitter you need for what you actually do online.
Testing & Methodology
How speed tests work and how to get accurate, meaningful results.
How Speed Testing WorksThe engineering behind speed measurement: connections, servers, and accuracy.
How to Test WiFi Speed AccuratelyWiFi vs wired testing, interference factors, and troubleshooting tips.
Why Results Are Different Every TimeReal reasons speed tests give varying numbers — and what to do about it.
Looking for formal engineering methodology?
Read our comprehensive documentation on sustained throughput, parallel connections, and bufferbloat.