What affects broadband speed

A speed test measures one path, at one moment, from one device. Several ordinary things move the number, and none of them require a new package.

The line into the building

Full fibre runs fibre all the way to the home. Other lines are fibre for most of the journey and copper, or coaxial cable, for the last stretch. On those lines, distance and the condition of that last stretch change what you can actually get. Mobile broadband moves with signal strength, walls, and how many people are using the same mast.

None of this tells you which technology you have. Your provider's installation details, or the socket and the cable coming into the router, are the place to look. This site cannot see your line.

Wi-Fi between you and the router

The test uses whatever this device is using. A weak signal, a crowded channel, or an old router often measures slower than the same line with a cable. If a laptop on Ethernet is quick and a phone in the back room is not, the gap is in the house, not in the package.

Ways to check and improve Wi-Fi starts with that comparison.

Everyone else, and everything else

Streaming, cloud backups, game downloads and other people's video calls share one connection. A test run while those are busy measures the capacity that is left. Pausing them, then testing again, shows how much they were using.

The device itself

Phones and laptops have their own limits: an old Wi-Fi radio, a VPN, a browser already downloading updates, low-power mode, or a weak mobile signal. Testing a second device, in the same place, is a quick way to see whether the first one is the ceiling.

Time of day, and where the test goes

Some networks are busier in the evening, when more people are online. A single test cannot prove that; two tests, one quiet and one busy, are more informative than either one alone.

The test also ends at this server. The path to a streaming service, a game, or an office VPN can be faster or slower. A good result here does not map every other destination, and a poor result here can be this server, this route, or your connection.

The package on the bill

Advertised speeds are often "up to" a figure. That is a ceiling the service is built around, not a promise that every Wi-Fi test will hit it. This site is not your provider and cannot see what you pay for, what your line can carry, or whether a fault is open.

If Ethernet, next to the router, with other devices idle, is still far from the speed you expected, the useful next step is your provider's own fault checks. They can see the line. A web page cannot.