The Starlink Speed Test is a generally accurate test for measuring real-time download and upload speeds on the Starlink network. It uses direct communication between the Starlink router and the wider network to give a clear snapshot of performance.
However, results vary depending on a range of factors including device quality, Wi-Fi conditions, time of day and network load. The test shows current throughput rather than guaranteed performance, so it should be interpreted alongside other measures such as latency readings, outage data, obstruction metrics and more.
In this article, we will explore how the Starlink Speed Test works, as well as what affects its accuracy and how to interpret the results with confidence.
What Does the Starlink Speed Test Actually Measure?
The built-in speed test measures three core metrics:
- Download speed – Data delivered from the network to your device
- Upload speed – Data sent from your device to the network
- Latency – The delay between your data request and the response
These measurements come directly from the dish and router. This avoids many variables that affect third-party tests.
The Starlink speed test reflects dish-to-network performance, not device-to-router performance. This distinction makes the readings more reliable than typical consumer Wi-Fi tests.
How Accurate are Starlink Download and Upload Readings?
Download and upload values are accurate under controlled conditions. They align closely with real throughput when tested over a wired connection.
Typical UK Starlink figures:
- Download – 100 – 250mb/s
- Upload – 10 – 25mb/s
- Latency – 25 – 50m/s
Typical Staffordshire and the West Midlands Starlink figures:
- Download – 100 – 250mb/s
- Upload – 10 – 25mb/s
- Latency – 25 – 50ms
The accuracy of these figures will drop when:
- Several devices compete for bandwidth
- Strong WiFi interference is present
- Testing is done far from the router
- Peak-hour congestion is high
Starlin’s test is most accurate when run on a single device connected by Ethernet.
Why Starlink’s Test Differs from Third-Party Speed Tests
Third-party speed diagnostic tools such as Ookla, Fast.com and even Google Speed Test measure performance from the individual device, not the dish itself. This introduces variables that can distort results. In short, they reflect your local network more than your actual satellite link.
Additional key differences include:
| Metric | Starlink App Test | Third-Party Speed Test |
|---|---|---|
| Measures dish performance | Yes | No |
| Affected by Wi-Fi conditions | No | Yes |
| Shows obstruction warnings | Yes | No |
| Shows router-to-device performance | No | Yes |
| More sensitive to congestion | Moderately | Highly |
Why Your Starlink Speed Test Results Vary Throughout the Day
Performance variation is normal on a shared satellite network. Throughput changes with demand, weather, temperature and dish obstructions. Evening peaks often show lower speeds due to regional congestion. Short-term fluctuations also occur as the dish switches between satellites.
These variations do not mean the test is inaccurate. They reflect the real conditions at the moment of testing.
What is a Realistic Margin for Accuracy?
The Starlink Speed Test is typically accurate within 10 – 15% of true throughput when using a wired connection. This margin comes from small changes in routing and capacity.
A larger gap usually indicates WiFi issues, obstructions, local congestion or potentially a server issue.
A simple rule applies – a clean wired test reflects the satellite link, while a wireless test reflects your home network.
How WiFi Impacts the Accuracy of Starlink Speed Test Results
The Starlink test measures dish and router performance. It does not confirm whether your device receives the same speed.
Wi-Fi reduces accuracy due to:
- Signal attenuation through walls
- Interference from neighbours
- Device limitations
- Outdated Wi-Fi standards (e.g. Wi-Fi 4 or older)
A quoted guideline from Starlink itself is that “Poor WiFi can make a fast Starlink connection appear slow“.
So for accurate testing, be sure to use an Ethernet adapter or run the test from the router diagnostics panel in the app.
How to Improve the Accuracy of Your Starlink Speed Test
Before Testing
- Disconnect non-essential devices
- Move closer to the router
- Use Ethernet for best accuracy
- Check the dish for obstruction warnings
- Confirm the router is running updated firmware
During Testing
- Run multiple tests
- Test at different times of day
- Compare the results between Starlink’s test and one third-party tool
After Testing
- Review latency stability
- Track outage notifications
- Investigate persistent low-speed readings
This creates a well-rounded performance profile.
Conclusion
The Starlink speed test is accurate for evaluating the satellite link and gives an unfiltered view of current network performance. It is most reliable when run over Ethernet and when tested at multiple times.
Wi-Fi and local conditions influence the device’s displayed result but not the test itself. For clear troubleshooting, combine the Starlink test with occasional wired checks and the app’s obstruction tool.
If you need help assessing your Starlink performance or want professional installation support, get in touch with AAV for expert guidance.
