How does our speed test work?
Our test measures the real speed of your connection between your device and a measurement server, in three phases: latency (ping and jitter), download speed and upload speed. The whole thing takes about 30 seconds and reflects your real experience — including your Wi-Fi, your device and your internal wiring, not just the operator's fibre.
At the end you get your real speed, a personalised diagnosis and the offer best suited to your measured usage. Your measurement, anonymous, feeds the Switchr Barometer of real speed in Luxembourg.
How to read your results: download, upload, ping, jitter
A good plan is not only about a big download figure: for remote work, watch the upload; for gaming and video calls, latency and jitter matter most.
Real speed vs advertised speed: why the gap?
In Luxembourg, the advertised speed (up to 8.5 Gbit/s on FTTH fibre) is a theoretical maximum reached only over Ethernet cable with a compatible device. In real life, the measured speed is almost always lower — and that is normal.
Wi-Fi or Ethernet: the number-one factor
Wi-Fi is the weakest link: depending on your router, distance and walls, it often delivers only 40 to 70% of the line's speed, and frequently caps between 400 and 900 Mbit/s even on multi-gigabit fibre. To know the true speed of your subscription, plug your computer into Ethernet and re-run the test.
Other causes of lower speed
- Older device or limited Wi-Fi card (Wi-Fi 5 vs Wi-Fi 6/7);
- Peak hours (evening congestion), especially on shared-bandwidth cable;
- Internal wiring, adapters and cable length;
- Several devices active at the same time during the test.
Our diagnosis takes the connection type into account: a Wi-Fi result is judged differently from an Ethernet result.
Which speed for which use in Luxembourg?
| Profile | Recommended speed | Uses |
|---|---|---|
| 1 person | 100–500 Mbit/s | 4K streaming, browsing, remote work, video calls |
| Couple | 1 Gbit/s | Multiple streams, gaming, simultaneous remote work |
| Family 3–4 | 1–2 Gbit/s | Several 4K streams, gaming, large downloads |
| Large household / flatshare | 2–5 Gbit/s | Many simultaneous devices, content creators |
| Gamer | 1 Gbit/s (low latency) | Priority on ping and stability, FTTH fibre |
For the vast majority of homes, 1 Gbit/s is more than enough. 2 Gbit/s is relevant for heavy-use families; 5 to 8.5 Gbit/s remains a niche. → Compare all internet offers in Luxembourg
How many Mbit/s do you need per service?
A speed of 100 Mbit/s already covers most uses. What matters is the total of simultaneous uses in the household: multiply a service's need by the number of people or screens active at the same time.
| Use | Recommended speed (per stream) |
|---|---|
| Browsing, email, social media | 5–10 Mbit/s |
| Music streaming (Spotify, Deezer) | 1–2 Mbit/s |
| HD 1080p video streaming (Netflix, YouTube) | 5–8 Mbit/s |
| 4K streaming (Netflix, Disney+, Prime Video) | 25 Mbit/s |
| HD video calls (Zoom, Teams, Meet) | 3–5 Mbit/s |
| Remote work (VPN + cloud + video calls) | 20–50 Mbit/s |
| Online gaming (PS5, Xbox, PC) | 10–25 Mbit/s + latency < 30 ms |
| Cloud gaming (GeForce Now, Xbox Cloud) | 35–50 Mbit/s |
| Large downloads / games (100 GB) | as much speed as possible |
Concrete example: a family with two 4K streams (2 × 25 Mbit/s), a work video call (5 Mbit/s) and an online console (20 Mbit/s) needs about 75 Mbit/s simultaneously — a 1 Gbit/s fibre absorbs this with plenty of headroom for peaks.
→ Test your real speed to check whether your connection handles these uses.
Slow internet in Luxembourg: causes and fixes
A measured speed far below your plan comes 9 times out of 10 from your setup, not the operator: Wi-Fi, device or wiring. Before switching plans, try these tweaks — then re-run the test.
Still too slow after these tweaks? It may be time for a faster plan better suited to your address. → Compare internet offers in Luxembourg
The Switchr Barometer of real speed in Luxembourg
The only 100% Luxembourg ranking of real speed — published once a year.
Every test run here feeds the Switchr Barometer: the first independent measurement of the speed actually received by Luxembourg subscribers, operator by operator and municipality by municipality. Unlike foreign rankings (nPerf, Ookla), it is built here, with real users from the country.
To preserve the method's reliability, the full ranking is not shown in real time: it is published in an independent annual report, every January. As a benchmark, according to existing barometers (nPerf 2025, Speedtest/Ookla 2024), Tango is the only operator on the podium of both rankings — a sign of consistent network quality.
Frequently asked questions about the speed test
Methodology & privacy
What the test measures. Speed is measured end-to-end between your device and our measurement server hosted on a delivery network close to Luxembourg, to reflect your real connection rather than our server's load. Download uses several parallel streams to saturate the line; upload sends locally generated data; ping and jitter are measured over short repeated requests.
Data recorded (anonymous). Automatically detected operator (ASN) and ISP name, download and upload speed, ping, jitter, approximate municipality, device/browser type and timestamp. No personal data. These aggregated measurements form the Switchr Barometer.