Packet Loss Test
Sending 100 packets to measure drop rate.
A good internet connection is not only about download and upload speed. Your connection also needs to deliver data reliably.
Packet loss happens when some packets of data do not successfully reach their destination. Even a fast internet connection can feel unreliable when packets are being lost.
Our Packet Loss Test helps you check your connection for packet loss and understand what your result means.
Packet loss can affect online gaming, video calls, voice calls, streaming, browsing, and other real-time internet activities. Cloudflare also includes packet loss as one of the important measurements when evaluating overall internet quality.
What Is Packet Loss?
When you use the internet, information is divided into small pieces called packets.
These packets travel between your device and an internet server.
For example, when you join a video call, your voice and video data are sent across the network in packets. If some packets fail to reach their destination, you may notice problems such as:
- Choppy audio
- Frozen video
- Game lag
- Connection drops
- Missing data
- Slow or interrupted communication
A small amount of packet loss can sometimes have little noticeable effect. Larger or repeated packet loss can create more obvious connection problems.
What Is a Packet Loss Test?
A packet loss test checks whether packets sent across a network path successfully reach their destination.
The test sends or measures network traffic and looks for packets that do not arrive successfully.
The result is normally shown as a percentage.
For example:
| Packet Loss | What It May Mean |
|---|---|
| 0% | No packet loss detected during the test |
| Less than 1% | Very small amount of loss |
| 1–2% | May be noticeable in some real-time activities |
| Above 2% | Connection problems may become more noticeable |
| High or repeated loss | Possible network or connection problem |
These values are useful as general guidance, not as universal pass/fail limits. Results can vary depending on the test method, server, network, and application.
Why Is Packet Loss Important?
Packet loss matters because internet applications depend on packets arriving successfully.
A speed test may show excellent download speed while another part of your connection is experiencing packet loss.
Cloudflare notes that internet quality involves more than bandwidth and can include measurements such as latency, jitter, and packet loss.
Packet loss can be especially noticeable during:
- Online gaming
- Video meetings
- Voice calls
- Live streaming
- Remote work
- File transfers
- Other real-time applications
What Causes Packet Loss?
Packet loss can have many possible causes.
WiFi Problems
Weak WiFi signals, interference, distance from the router, and busy wireless networks can affect connection quality.
If packet loss appears on WiFi but disappears when using Ethernet, your wireless connection may be part of the problem.
Network Congestion
When a network becomes busy, packets can be delayed or dropped.
This can happen when several devices are using the same connection for activities such as:
- 4K streaming
- Large downloads
- Cloud backups
- Online gaming
- Video calls
Router Problems
An overloaded, outdated, or malfunctioning router can sometimes cause connection problems.
Restarting the router is one of the basic troubleshooting steps recommended by Ofcom for broadband and WiFi problems.
ISP or Network Problems
Packet loss can occur somewhere between your home and the destination server.
If packet loss continues across multiple tests and devices, the issue may be outside your individual device.
Network Routing
Internet traffic can travel through multiple network paths before reaching its destination.
Problems on one part of that path can affect latency or packet delivery.
Ethernet or Cable Problems
A damaged Ethernet cable, loose connection, or faulty network equipment can also contribute to connection problems.
How Does Packet Loss Affect Online Gaming?
Packet loss can be particularly frustrating for gamers.
Online games constantly exchange information between your device and the game server.
When packets are lost, the game may not receive information correctly or on time.
You may notice:
- Characters moving suddenly
- Delayed actions
- Rubber-banding
- Missing shots or actions
- Temporary freezes
- Disconnections
This is why gaming performance cannot be judged by download speed alone. Packet loss and latency can also affect the experience.
How Does Packet Loss Affect Video Calls?
Video calls need a stable connection because audio and video information is continuously exchanged.
Packet loss may cause:
- Robotic or broken audio
- Frozen video
- Missing words
- Video quality changes
- Temporary disconnections
For important meetings, a stable connection can matter more than having extremely high download speed.
Packet Loss vs Ping
Packet loss and ping measure different things.
| Metric | What It Measures | Lower Is Better? |
|---|---|---|
| Ping | Time taken for data to travel to a server and back | Yes |
| Packet Loss | Percentage of packets that fail to arrive | Yes |
| Jitter | Variation in latency | Yes |
| Download Speed | How quickly data can be received | Higher is generally better |
| Upload Speed | How quickly data can be sent | Higher is generally better |
A connection can have low ping but still experience packet loss.
It is therefore useful to check multiple network measurements instead of looking at only one number.
Packet Loss vs Jitter
These two terms are sometimes confused.
Packet loss means some packets do not successfully arrive.
Jitter describes variation in packet arrival times or latency measurements.
A connection can have:
- Low jitter and no packet loss
- High jitter with no packet loss
- Packet loss with low jitter
- Both high jitter and packet loss
Cloudflare measures both jitter and packet loss when assessing different types of internet usage.
How to Run a Packet Loss Test
Running a packet loss test is simple.
Step 1: Open the Packet Loss Test
Open the Packet Loss Test tool on Speed Test UK.
Step 2: Start the Test
Start the test and allow it to complete.
Step 3: Check the Result
Look at the packet loss percentage.
Step 4: Repeat the Test
Run the test more than once if the result looks unusual.
A single test is only a snapshot of your connection at that moment. Cloudflare describes internet speed tests as point-in-time measurements, so repeated testing can help you understand whether a problem is consistent.
How to Get More Accurate Packet Loss Results
For better results, follow these simple tips:
- Stop large downloads during the test.
- Pause cloud backups.
- Close unnecessary streaming apps.
- Ask other users to reduce heavy internet use temporarily.
- Test close to your WiFi router.
- Try an Ethernet connection if possible.
- Run the test more than once.
- Test at different times of day.
- Test on more than one device.
- Compare WiFi and wired results.
Test Packet Loss on WiFi
WiFi can introduce problems that are not present on a wired connection.
For example, your internet service may be working normally, but your device may have a weak wireless signal.
Try these tests:
| Test | What You Can Learn |
|---|---|
| WiFi near router | Checks performance with a stronger signal |
| WiFi farther away | Helps identify signal-related problems |
| Ethernet | Helps compare wired and wireless performance |
| Different device | Checks whether the problem is device-specific |
| Different time | Helps identify congestion or busy-period issues |
If packet loss happens only on one device, the device or its connection may need further checking.
Why Does Packet Loss Happen at Night?
Some users notice connection problems during busy periods.
One possible reason is increased network activity.
However, the exact cause depends on your network, ISP, local equipment, and the destination being tested.
If you notice packet loss mainly at certain times, record your results and compare several tests.
This can provide useful information when troubleshooting the connection.
Can Fast Internet Still Have Packet Loss?
Yes.
A connection can have a high download speed and still experience packet loss.
For example, you might have:
- 500 Mbps download speed
- Low ping
- But noticeable packet loss
This is why internet quality should not be judged by speed alone.
Cloudflare’s current internet-quality measurements include download, upload, latency, jitter, and packet loss.
How to Reduce Packet Loss
The right solution depends on the cause.
Try these steps:
Restart Your Router
Turn your router off, wait briefly, and restart it.
This is one of the basic troubleshooting steps recommended by Ofcom for broadband and WiFi issues.
Move Closer to the Router
If you use WiFi, move your device closer to the router and test again.
Try Ethernet
Connect your computer directly to the router with an Ethernet cable.
If packet loss disappears, your WiFi connection may need attention.
Reduce Network Traffic
Pause activities such as:
- Large downloads
- Cloud backups
- High-quality streaming
- Game updates
- Other heavy transfers
Restart Network Equipment
If you use a mesh system, WiFi extender, or other network equipment, restart the relevant devices as part of basic troubleshooting. Ofcom recommends checking routers, boosters, mesh devices, and fibre equipment when troubleshooting broadband problems.
Check Your Cables
Check that Ethernet and other network cables are properly connected and not damaged.
Test Different Servers
A problem may be related to the route or destination being tested rather than your entire internet connection.
Testing different destinations can help provide more context.
When Should You Contact Your Internet Provider?
Consider contacting your internet provider when:
- Packet loss happens repeatedly.
- Packet loss appears on multiple devices.
- Packet loss continues over Ethernet.
- Your connection frequently disconnects.
- Online calls regularly break up.
- Gaming regularly suffers from severe lag.
- Restarting your equipment does not help.
- The problem continues at different times.
Keep screenshots or notes of your test results.
You can provide your ISP with:
- Date and time
- Packet loss percentage
- Ping results
- Jitter results
- Download speed
- Upload speed
- Connection type
- Whether you used WiFi or Ethernet
This information can make troubleshooting easier.
Does Packet Loss Affect Streaming?
It can.
Streaming services usually buffer data, which can help hide small temporary network problems.
However, repeated or significant packet loss can contribute to interruptions or reduced quality, particularly when the connection cannot recover quickly.
Real-time applications are often more sensitive to packet loss than buffered activities.
Ofcom’s broadband research has also documented packet loss as a factor that can affect real-time applications and streaming audio or video.
Does Packet Loss Affect Browsing?
It can, although the effect may not always be obvious.
Many web connections use protocols designed to handle lost packets by retransmitting information.
You may notice:
- Pages taking longer to load
- Failed requests
- Images loading slowly
- Temporary connection errors
The effect depends on how much packet loss occurs and where it happens.
Packet Loss on Mobile Internet
Packet loss can also occur on mobile networks.
Mobile connections can change because of:
- Signal strength
- Network congestion
- Movement
- Indoor coverage
- Network conditions
- Distance from a cell site
If you are testing mobile internet, repeat the test from different locations and at different times.
What Is a Good Packet Loss Result?
For most everyday internet activities, 0% packet loss is an ideal result during a test.
However, one test result does not automatically prove that your connection is perfect or that a higher result always means your ISP is responsible.
Your test method, server, WiFi conditions, device, and network path can all influence the measurement.
A repeated packet loss problem is more useful for troubleshooting than one unusual result.
Important Points
- Packet loss means some network packets fail to reach their destination.
- Lower packet loss is generally better.
- 0% packet loss is an ideal result during a test.
- High-speed internet can still have packet loss.
- Packet loss can affect gaming and video calls.
- WiFi can sometimes contribute to packet loss.
- Ethernet testing can help separate WiFi problems from wider connection problems.
- Ping, jitter, and packet loss measure different parts of connection quality.
- Repeat unusual tests before deciding there is a serious problem.
- If packet loss continues across multiple devices and tests, contact your ISP.
Frequently Asked Questions
What is a packet loss test?
A packet loss test checks whether data packets successfully travel across a network path. The result is normally shown as a percentage of packets that were lost.
What is a good packet loss percentage?
For most internet activities, 0% packet loss is an ideal test result. Small amounts may not always be noticeable, but repeated or higher packet loss can affect real-time applications.
Is 1% packet loss bad?
1% packet loss may or may not be noticeable depending on what you are doing. It can be more important for gaming, voice calls, and video meetings than for some basic browsing activities.
Why am I getting packet loss?
Possible causes include WiFi interference, network congestion, router problems, damaged cables, ISP issues, or problems somewhere along the network route.
Does packet loss cause lag?
Yes. Packet loss can contribute to lag, interruptions, rubber-banding, and connection problems, especially in online games and other real-time applications.
Can WiFi cause packet loss?
Yes. Weak signal, interference, distance from the router, and wireless congestion can affect connection quality.
Can a VPN cause packet loss?
A VPN adds another network path between your device and the destination. Depending on the VPN service and route, it can change latency and overall connection behavior. If you are troubleshooting packet loss, compare results with the VPN turned off and on.
How do I fix packet loss?
Start with basic troubleshooting: restart your router, reduce network traffic, move closer to the router, test with Ethernet, check cables, and repeat the test. If the problem continues, contact your internet provider.
Is packet loss worse for gaming or streaming?
Packet loss can affect both, but real-time activities such as online gaming and video calls can make connection problems more noticeable.
Should I test packet loss more than once?
Yes. Repeating the test can help determine whether packet loss is occasional or persistent.
Final Thoughts
Packet loss is an important part of internet connection quality.
Your connection may have excellent download and upload speeds but still feel unreliable if packets are repeatedly being lost.
Use the Packet Loss Test to check your connection, compare results over time, and test both WiFi and Ethernet when possible.
For a more complete picture of your internet connection, also check your ping, jitter, download speed, and upload speed. These measurements together can provide more useful information than download speed alone.
If packet loss continues across repeated tests and different devices, keep your results and contact your internet provider for further troubleshooting.
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