Internet speed test: what is your Wifi, Fibre or ADSL connection speed?

8 June 2022
Test your Internet speed with this free speed test in Luxembourg

The test to know your Internet speed

Want to know how fast your Internet connection is? Here is a free speed test to measure your bandwidth. Start the test by clicking on "GO".

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How to know your internet speed?

To find out your connection speed, you usually need to perform a test using a free tool like the one presented on this page. With this test you can measure :

  • The speed of your Wifi connection at home
  • The speed of your Internet fibre
  • But also the speed of your 4G or 5G package

This flow test allows measure your download speed and upload speedwhich are the main parameters that affect your daily connection.

  • With a low download speedIf you're not sure how to use your computer, you'll have trouble watching Netflix movies or series in very good quality. You
  • With a slow upload speed (i.e. sending of files)If you are using a computer, you may experience lag when making video calls or playing games online.

It is therefore important to have a good Internet connection on a daily basis. If you have noticed that your connection is slow after this test, read our dedicated article to find out how to improve your Internet connection.

Our tips for improving your connection

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Interpreting the results of the Internet speed test

The criteria for testing your connection

Four analysis parameters are taken into account to test your bandwidth:

  • The download speed or reception ratewhich determines the speed at which you download files (Netflix series, movies, video games, video call streams)
  • The upload speed or sending rateThis defines the speed at which you send information over the Internet (video calls, Google searches, file transfers or attachments)
  • The pingor latency Latency: this is the time it takes for information to travel back and forth between your device (computer, tablet, mobile) and the server. Latency is expressed in milliseconds. The higher it is, the more you will experience delays in your connection and in your video calls for example.
  • The jitter : This parameter indicates the stability of your latency. If your jitter is high, it means that the latency varies a lot, which is not a good sign. The more jitter you have, the more stable your connection is, and the fewer latency problems you will have.

The analysis of these 4 parameters allows you to have a complete understanding of the state of your Internet connection.

Values that indicate that you have a good Internet connection

These are the ideal parameters to achieve if you have a fibre subscription:

  • The download speed is ideally higher than 500 Mbit/s you download files quickly
  • The sending speed is higher than 300 Mbit/s you can send files quickly
  • The ping is less than 10 ms low latency between your computer and the server
  • Jitter is close to 1 ms latency is very stable

These values are indicative and depend on many factors (your Internet subscription, your fibre connection, the configuration of your home, etc).

However, if you have an ADSL subscription, you are unlikely to achieve this performance. In this case, we advise you to find a fibre subscription.

Conditions that can distort the test results

To ensure that you have accurate values that best represent your Internet connection:

  • Perform the flow test from a computer connected to your modem by an Ethernet cable. This will allow you to reach the maximum values of your Internet subscription. If you perform the test from a Wifi mobile, the speeds will be lower.
  • Close all your tabs and applications: you will be sure that no other website is taking up bandwidth. Your Internet connection will be maximised. Also make sure that no other devices in your home are connected to the Internet (such as a mobile phone, tablet or video game console).
  • Test your connection at off-peak times (e.g. in the morning or in the afternoon during the week). This is because upload and download speeds can vary depending on the number of simultaneous connections on the network. Generally, download and upload speeds are lower in the evening.

What is the difference in speed between ADSL, Wifi and Fibre Internet?

The speed of the fibre optic connection

Fibre Internet is the fastest connection method you can have. It connects the servers to your modem via cables where the information travels by light signals. So, theoretically, information travels at the speed of light!

Your modem then converts this light signal so that it can be transmitted over copper cables (Ethernet cables) and Wi-Fi to all the computers, tablets and phones in the house.

With a fibre connection you can reach :

  • Theoretical download speeds of 1 Gbit/s to 2 Gbit/s with some Luxembourg suppliers
  • theoretical upload speeds of 500 Mbit/s

All Luxembourg Internet providers now offer fibre. Feel free to analyse their offers on our online comparisons.

Which subscription should I choose?

Find the best fibre Internet subscription on this comparison.
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Wifi connection speed

With Wifi, the matter is more complicated to determine. Indeed, the speed of the connection depends on several factors:

  • The maximum Wifi speed offered by your modem. Providers can offer you several models of modems for hire, each with different Wi-Fi speeds.
  • The Wi-Fi speed supported by your device's network card (phones and computers have different maximum Wifi speeds)
  • The distance between the modem and your device : Wifi travels through the air (it is a wave), so the further away you are, the lower your throughput will be. Obstacles, such as walls, can also reduce your connection.

It is difficult to establish averages or values for a Wi-Fi connection. However, as an example, reception speeds of 500 Mbit/s can be obtained from an iPhone 12 located a few metres from a Fritzbox modem.

How fast is ADSL?

ADSL (or "asymmetrical digital link") is the first version of fast Internet: it uses the copper telephone network, but on different frequencies from telephone communications. At the time, in the early 2000s, it was a real revolution: you could surf the Internet and use the telephone at the same time! ADSL was then improved several times, notably with ADSL2+ which is in force today.

With ADSL, it is now possible to reach the following speeds:

  • 15 to 20 Mbit/s in reception
  • 800 kbit/s to 1 Mbit/s sending

If you reach these values, many European countries consider you to have "good broadband". But let's be clear: they have nothing to do with performance of the Internet fibre. However, ADSL is still very useful for connecting households that are not yet connected to the fibre network (e.g. in the countryside).

Frequently Asked Questions (FAQ)

What is the most reliable flow test?

Most sites offer the same speed tests: these are tests carried out by the same providers. The best known are nPerf and Speedtest. On this site, we offer a Speedtest tool. The values obtained by the 2 tools are relatively similar.

How to test your flow?

To test your throughput, you can use a free analysis tool. After running it, it takes a few seconds to a minute to measure your connection speed. You will then have all the information you need to understand your connection: receive speed, send speed, latency and jitter.

What is the normal fibre speed?

Most fibre Internet providers offer download speeds of 1 Gbit/s. However, these theoretical values are rarely reached. In Luxembourg, a normal fibre speed is between 300 and 600 Mbit/s download. It can be lower during peak hours and higher during off-peak hours.

What is a flow test?

A speed test is a free tool to measure your Internet connection speed. It is a module hosted by a test provider, which performs its measurements from a test server. To perform the test, the server sends and requests to receive data, so that it can calculate download and upload speeds.

How to know your internet speed?

First, check the details of the Internet subscription you have taken out. It will tell you the theoretical download and upload speeds advertised by the Internet provider. Next, make a free online debit test to measure your connection.

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