How the SpeedAccu speed test works
No black box. Here is exactly what happens when you press GO, what each number means, and where our numbers can differ from other speed tests.
What we measure
- Download speed
- How fast data comes in to your device - streaming, browsing, downloads. Measured in Mbps, megabits per second.
- Upload speed
- How fast data goes out from your device - video calls, cloud backups, sending files. Measured in Mbps.
- Ping
- The delay before data starts moving, in milliseconds. Low ping means a snappier connection. It matters most for gaming and video calls.
- Jitter
- How much your ping jumps around between probes. A steady 30 ms beats a jumpy 20-to-80 ms every time.
How we measure it
Download: your browser opens 6 connections at once and pulls data for 10 seconds. We skip the first 2 seconds while the connection warms up, then count what arrives. Several connections fill a fast line better than one - the same trick the big speed tests use.
Upload: 4 connections send data for 10 seconds, with the same warm-up rule.
Ping and jitter: we send 9 small probes and take the middle value, so one slow probe can't skew your result.
Why your result may differ from Ookla or fast.com
Ookla runs thousands of servers, picks the nearest one, opens many connections, and reports your peak speed. fast.com measures against Netflix's servers. We run one server and report what a real 10-second download looks like on 6 connections.
Different methods, different numbers - all honest about what they measure. If you want the highest number your line can hit, Ookla's peak reading is useful. If you want to know what everyday downloads feel like, that's what we show.
What we don't do
- No stored results
- Your test history lives in your browser only. Our servers never see it or keep it.
- No account, no tracking
- No signup, no app, no tracking of who you are.
- One server, stated openly
- We show our test server instead of pretending there is a server in every city.
Quick answers
- How long does the test take?
- About 15 seconds in total: a few seconds for ping, then 10 seconds each for download and upload.
- Should I test on Wi-Fi or with a cable?
- Use a cable for the truest number. Wi-Fi almost always reads lower than a wired test.