How to Read Your Speed Test Result

When the test finishes you get six numbers. Most people only look at download speed, but that number alone will not explain why video buffers every evening or why games lag on a "fast" plan. Here is what each one means in practice:

• Download: how much data reaches you per second. It decides how fast files download and what video quality you can watch without buffering.
• Upload: what you send out. It matters for video calls, cloud backups, posting photos and live streaming. On many ADSL lines and some mobile plans upload is less than a tenth of download.
• Ping: the time a small message takes to reach the server and come back, in milliseconds. Under 30 ms is excellent, 30–60 ms is good, and above 100 ms you will notice delay in games and calls.
• Download and upload latency: the same ping, measured while your line is fully loaded. This is what exposes bufferbloat: if ping jumps from 20 ms to 200 ms or more during the test, that is the lag you feel when someone at home starts a download.
• Jitter: how much ping varies from one moment to the next. Under 10 ms is excellent for calls and games; above 30 ms voice starts to break up.
• Packet loss: the share of data that never arrived. It should be zero or very close to it. Even 1–2% is enough to ruin a match or a call.

How Much Speed Do You Actually Need?

The figures below are per device running at the same time, based on what the platforms themselves recommend plus a small margin. Add up what runs together in your busiest hour to see which plan fits your home.

A realistic example: two people watching 4K, one on a work call and one gaming. That is about 25 + 25 + 4 + 5 = 59 Mbps down and 4–7 Mbps up. A 100 Mbps plan handles it comfortably; a 50 Mbps plan will struggle at peak time.

For large downloads: a 100 GB game takes about two and a quarter hours on a 100 Mbps line running at full speed, and around 22 minutes on a 1 Gbps line.

Why Is My Result Lower Than My Plan?

Before you call your provider, rule out the causes inside your home. In most cases one of these is responsible:

1. You are on Wi-Fi

Wi-Fi loses a large share of its speed with every wall. The 2.4 GHz band reaches further but rarely delivers more than 50–70 Mbps in practice; 5 GHz is much faster but fades quickly behind concrete. To test the line itself, use an Ethernet cable.

2. The device is the limit

A five-year-old phone or a laptop with an old network card may be the ceiling, not the line. And if your wired result is stuck at about 94 Mbps no matter what, the port or cable is probably running at 100 Mbps; try a Cat5e or Cat6 cable and a different port.

3. Other devices are using the line

A Windows update, a phone backing up photos to the cloud, security cameras uploading footage, a game downloading on another console. All of these take a share of the result without you noticing.

4. Peak hours

Between 8 pm and midnight your provider's network is at its busiest. If speed is fine in the morning and collapses every night, the bottleneck is usually capacity in your provider's local network, not your home.

5. VPN or security software

A VPN routes everything through an extra server and can halve your speed or worse while adding ping. Turn it off during the test if you want to measure the line itself.

How to Get a Result You Can Rely On

1. Connect to the router with a cable if you can, or at least sit in the same room as the router.
2. Pause downloads and streaming on other devices and switch off any VPN.
3. If the router has not been restarted in weeks, restart it and wait two minutes.
4. Run the test three times and use the average, not the best number.
5. Repeat at different times: morning, afternoon, and between 9 and 11 pm.
6. Keep the results. The History page saves them on this device automatically, which is very useful if you ever need to file a complaint.

Bad Result? Find Where the Problem Is

• Slow on cable and Wi-Fi: most likely the line, the modem or the provider. Restart, check the modem lights, then contact the provider with several days of results.
• Fast on cable, slow on Wi-Fi: the wireless network is the problem. Move the router somewhere high and central, use the 5 GHz network, or consider a mesh system for larger homes.
• Speed is fine but ping jumps during download or upload: that is bufferbloat. Turn on SQM or Smart QoS in the router if it has it, or limit upload speed in backup software.
• Constant packet loss: usually a damaged cable, a loose connector or a fault on the provider's line. This one the provider has to fix.
• Everything is fine except one site or game: the problem may be on that service's side. The Services Status page measures response time from your device to popular platforms to help you tell the difference.

How This Test Works, and Its Limits

The test runs entirely in your browser. It opens several parallel connections to the test server and downloads random data for a few seconds, then averages what actually arrived after discarding the first moments of ramp-up. It repeats the process for upload. During both phases it sends small ping requests to see how latency changes while the line is under load.

You can switch between "Multi" and "Single" mode. Multi shows the full capacity of the line; Single shows what one connection achieves, which is closer to what you feel downloading one file from an ordinary website. If the gap between the two is very large, a distant server or the network route may be the limit rather than your line.

Frequently Asked Questions