Speed
How Accurate Are Speed Tests?
Why results differ between testing websites and devices.
Speed test results are estimates based on the server, browser, device, connection method and network conditions at the time of testing.
Different services may use different numbers of connections, file sizes and server locations, which can change the final number.
For the clearest picture, run several tests, use the same device, and compare download, upload, ping and jitter together.
Quick checklist
- Run a fresh test after changing one setting.
- Compare Wi-Fi and Ethernet when possible.
- Check download, upload, ping and jitter together.