How to Test Your NBN Speed and Fix Slow Home Internet in Australia

Slow internet is frustrating, and it is often hard to tell whether the problem is your plan, your Wi-Fi, your router, or something else entirely. A quick speed test can help, but only if you run it the right way. This guide walks through how to test your NBN speed properly in Australia, how to read the result, and the fixes that solve most slowdowns without a call to your provider.

Step 1: Check what speed your plan should deliver

Before you test anything, find out what you are paying for. Log in to your provider's app or website and check your plan name and its typical evening speed. In Australia, providers list a typical evening speed, usually measured between 7pm and 11pm, because that is when networks are busiest.

Also check whether you are on fixed line, fixed wireless, or satellite NBN, since each type has different realistic speeds.

Write down your plan speed and the technology type. You will need both numbers when you compare them with your test result.

Step 2: Run a proper speed test

For the most accurate result, test with a wired connection first. Plug a laptop directly into your router or modem with an Ethernet cable, close other apps and downloads, and ask others in the house to pause streaming for a few minutes. Then run a test on a reputable speed test site or app.

Run the test three times, a minute apart, and note the download speed, upload speed and ping for each run. Download speed is the number most people care about, since it controls streaming, browsing and downloads. Upload speed matters for video calls and sending large files. Ping, measured in milliseconds, shows delay, and a lower number is better for gaming and video calls.

After the wired test, run the same test over Wi-Fi from the room where you normally use the internet. If the wired result is close to your plan speed but the Wi-Fi result is far lower, the problem is your Wi-Fi coverage, not your NBN connection. That distinction saves a lot of wasted troubleshooting.

Step 3: Restart and reposition your router

If your speeds look low, start with the simplest fix. Turn your router off at the power point, wait 30 seconds, then turn it back on and wait a few minutes for it to reconnect. This clears temporary glitches and lets the router pick a fresh connection.

Next, look at where the router sits. It should be out in the open, roughly at chest height, away from thick walls, metal objects, fish tanks and microwave ovens. Do not hide it inside a cupboard or behind the television. If your house is large or has thick brick walls, a single router in one corner will struggle to reach the far rooms, and that is a coverage problem rather than a speed problem.

Step 4: Split the Wi-Fi bands and reduce congestion

Most modern routers broadcast two Wi-Fi bands: 2.4 GHz, which travels further but is slower, and 5 GHz, which is faster but covers a shorter distance. In most recent versions of router software, these bands are combined under one network name, and your device picks one automatically. That is convenient, but it can also leave a device stuck on the slower band.

Log in to your router settings, usually by typing its address into a browser, and look for the Wi-Fi settings. If you can, give the 2.4 GHz and 5 GHz networks separate names, then connect phones and laptops that stay near the router to the 5 GHz network, and leave distant or low demand devices on 2.4 GHz. Check your router manual for the exact steps, since menus vary by brand.

Pause cloud backups and large downloads while you test, since one background download can make a whole household feel slow.

Step 5: Try a Wi-Fi extender or mesh system

If wired speeds are fine but Wi-Fi is weak in some rooms, a Wi-Fi extender or mesh system is usually the fix. An extender repeats the signal into a dead zone, while a mesh system uses several units that talk to each other and hand your device over smoothly as you move around the house.

Place an extender or extra mesh unit about halfway between the router and the dead zone, not inside the dead zone itself, or it will have no good signal to repeat. For a larger home, a mesh system with two or three units generally works better than a single extender, though it costs more.

After setup, rerun your Wi-Fi speed test from the problem room and compare it with the earlier result.

Step 6: Contact your provider with evidence

If wired speeds stay well below your plan's typical evening speed at all hours, even after a restart and a cable check, it is time to contact your provider. Give them your plan name, your wired test results with dates and times, and the fact that you tested with an Ethernet cable. That evidence helps them check for a line fault, a faulty modem, or a problem with your NBN technology type.

Ask them to check whether your modem firmware is up to date, whether your connection is on the right speed profile, and whether there is a known outage or fault in your area. If they offer a replacement modem, test again once it arrives before accepting that the problem is fixed.

Frequently Asked Questions

What is a good NBN speed test result in Australia?

A good result is close to your plan's typical evening speed on a wired test, especially outside peak hours. A small gap is normal, but a wired result that is consistently far below that figure, at different times of day, suggests a fault or a setup problem worth investigating.

Why is my Wi-Fi slower than my wired speed?

Wi-Fi is affected by distance, walls, interference from neighbours and the number of connected devices, while a wired connection avoids most of that. If wired speeds are fine and Wi-Fi is slow, focus on router placement, band settings, and coverage with an extender or mesh system, rather than changing your NBN plan.

Should I test my NBN speed on my phone?

A phone test is useful for checking Wi-Fi in a particular room, but it is not a reliable test of your NBN connection itself. For that, use a laptop connected by Ethernet cable, close other apps, run the test three times, and compare the average with your plan's typical evening speed.