You are paying for a fibre plan with a big headline number, but video calls stutter and downloads crawl. Before you call your provider, it is worth running a proper test. Knowing how to test internet speed accurately means removing the things that drag a reading down, such as WiFi interference, busy devices and the wrong time of day, so you can tell whether the problem is your line, your router or your home setup. This guide walks you through a reliable method and explains what the results mean.
Why a Quick Speed Test Often Misleads
Most people tap a speed test app on their phone from the sofa and take the number at face value. That figure reflects a lot more than your broadband line:
- WiFi signal strength between your phone and the router, which drops through walls and over distance.
- Your device’s own limits, since older phones and laptops may not support faster WiFi standards.
- Other activity at home, like someone streaming, a games console updating or cloud backups running.
- The test server you connect to, and how busy or far away it is.
- Time of day, because evening peak use can affect performance.
A single low reading tells you something is slow somewhere, but not where. The method below isolates each factor.
Step 1: Test on a Wired Connection First
The most accurate test of the line coming into your home is done with a cable, not WiFi.
- Use a laptop or desktop with an Ethernet port, or a USB to Ethernet adapter.
- Plug a LAN cable directly into your router. If your setup has a separate fibre terminal (the ONT, the box where the fibre enters your home) and a router, plug into the router.
- Check the cable and port speed. For gigabit or faster plans, you need a cable rated Cat 5e or higher, and a computer port that supports at least gigabit. A 100 Mbps port will cap your result no matter what plan you have.
- Close other apps and pause downloads, cloud sync and updates.
- Run the test, then repeat it two or three times and note the results.
If the wired result is close to your plan’s advertised speed, your line is probably fine, and any problem lies with WiFi or devices. Note that advertised speeds are typically maximums, and real-world results are usually somewhat lower.
Step 2: Test Over WiFi, Room by Room
Once you have a wired baseline, test WiFi to see how much speed you lose.
- Start near the router, in the same room with a clear line of sight.
- Then test where you actually use the internet, such as the bedroom, study or kitchen.
- Use the same device each time so results are comparable.
- Note which WiFi band you are on. Many routers offer 2.4GHz (longer range, slower) and 5GHz or 6GHz (faster, shorter range). Some combine them under one network name.
A big drop between rooms suggests a coverage issue. Concrete walls in HDB flats and condos can weaken signal significantly, which is why mesh systems or extra access points are common fixes. If you game online, our guide on improving your home internet for gaming covers router placement and wired options in more depth.
Step 3: Test at Different Times
Speed can vary across the day. To get a fair picture:
- Test in the morning or early afternoon, when fewer people are online.
- Test again in the evening peak, typically after dinner.
- Repeat over a few days, not just once.
If wired results are consistently good during quiet hours but drop sharply every evening, that pattern is useful information to share with your provider.
How to Read Your Speed Test Results
Most speed test tools show four main figures. Here is what each one means and when it matters.
| Measurement | What it means | When it matters most |
|---|---|---|
| Download speed (Mbps) | How fast data comes to you | Streaming, downloads, browsing |
| Upload speed (Mbps) | How fast you send data out | Video calls, uploading files, cloud backups |
| Ping or latency (ms) | Time for a signal to make a round trip | Online gaming, video calls |
| Jitter (ms) | How much latency varies between readings | Smooth calls and gaming |
A few pointers:
- Higher is better for download and upload speeds.
- Lower is better for ping and jitter. A steady low ping matters more than a huge download number for gaming and calls.
- Mbps vs MBps. Speeds are shown in megabits per second (Mbps). File download progress in browsers is often shown in megabytes per second (MBps), which is roughly one eighth of the Mbps figure. This explains why a “1 Gbps” plan does not download files at “1,000 MB per second”.
- Packet loss, if shown, should ideally be zero. Any regular loss can cause choppy calls.
To decide whether your results are good enough for how your household uses the internet, see what internet speed do you really need.
Choosing a Testing Tool
You can use any reputable browser-based speed test or app. To keep results consistent:
- Stick with the same tool when comparing over time.
- Choose a nearby server, ideally one in Singapore, for a fair measure of your local line. Testing to an overseas server will naturally show higher ping.
- Use your provider’s own test page if it has one, because support teams may ask for those results.
- Use a browser rather than a VPN connection. VPNs add overhead and routing, so switch them off for testing.
What to Do If Your Results Are Low
Work through these checks before contacting your provider:
- Restart the router and ONT. Switch them off, wait a minute and switch them back on.
- Check for loose or damaged cables.
- Update router firmware, through the router’s admin page or app.
- Check the router’s capability. An older router may not support your plan’s full speed.
- Move the router to a central, open spot rather than inside a cabinet or DB box.
If wired tests are still well below your plan after these steps, contact your provider with your test results, times and the method you used. If you are moving house or unhappy with your service, our guide on how to switch internet providers when you move home explains the steps. Remember that plan terms, minimum speed commitments and support processes differ between providers, so check your contract.
A careful wired test, a few WiFi checks and readings at different times give you a clear, fact-based picture of your connection, which makes any conversation with your provider far more productive.