What an internet speed test measures
A speed test sends and receives data between your device and a nearby server to measure how fast your connection really is right now. It reports three things that together describe the quality of your connection — not just how "fast" it feels, but how responsive it is for calls, gaming, and streaming.
Understanding your results
- Download speed — how quickly you can pull data from the internet (loading pages, streaming video, downloading files). This is the number most people care about, measured in Mbps.
- Upload speed — how quickly you can send data out (video calls, posting photos, backing up to the cloud). It's usually lower than download on home connections.
- Ping / latency — the delay before data starts moving, in milliseconds. Lower is better; it matters most for video calls and online gaming.
- Jitter — how much your latency varies. High jitter causes choppy calls and lag spikes even when your bandwidth looks fine.
Mbps vs. MB/s — why the number looks small
Speeds are measured in megabits per second (Mbps), but files are measured in megabytes (MB). There are 8 bits in a byte, so a 100 Mbps connection downloads at roughly 12.5 MB/s. That's why a "fast" connection can still feel slower than the headline number suggests.
What counts as a good speed?
For one person browsing and streaming HD, 25 Mbps is plenty. For a household streaming 4K, gaming, and several people working from home, aim for 100 Mbps or more. For smooth video calls, stable ping (under ~50 ms) and low jitter matter more than raw bandwidth.
Tips for an accurate test
- Pause large downloads, streaming, and cloud backups before testing.
- Test on a wired connection, or stand near your router, to isolate Wi-Fi issues.
- Run the test a few times and compare — a single result can be misleading.
- Compare the result against the speed your ISP promised in your plan.
Frequently asked questions
Why is my speed slower than what I pay for?
Wi-Fi interference, distance from the router, older hardware, network congestion at peak hours, and other devices using bandwidth can all reduce real-world speed. A wired test that's still far below your plan is worth raising with your ISP.
Does this speed test use my data?
Yes — a test downloads and uploads sample data to measure throughput, so it consumes a small amount of your data allowance. On a metered or mobile connection, keep that in mind before running it repeatedly.
Why does my speed differ from another speed test?
Results vary with the test server's location and load, the time of day, and which device you use. Small differences between tools are normal; look at the trend across several runs rather than a single figure.