Why Is My Ethernet Slower Than Wifi? [7 Facts]

Ethernet and WiFi are both types of networking technology. Why Is My Ethernet Slower Than Wifi? There are many factors that can affect the speed of your Ethernet connection, from your network hardware and configuration to your home’s layout.

One common cause of slower Ethernet performance is interference from other wireless devices in your home. By understanding how these different types of interference can impact your network, you can start to identify where the problem may be and take steps to fix it.

What Is The Difference Between Ethernet And Wifi?

The first difference is that Ethernet cables use physical wires to connect devices together, while WiFi uses radio waves to connect devices. This means that Ethernet is better for transferring large amounts of data, while WiFi is better for connecting multiple devices in a small area.

Another difference is that Ethernet connections are generally more reliable and faster than WiFi connections. This is because WiFi signals can be interrupted by things like walls and furniture, while Ethernet cables are less likely to experience interference.

Overall, Ethernet and WiFi are both useful technologies, but they each have their own strengths and weaknesses.

7 Reasons Why Is My Ethernet Slower Than Wifi?

There could be a number of reasons why your Ethernet might be slower than you expect.

1. Distance

There are a few factors that can contribute to this discrepancy, but distance is one of the biggest.

Ethernet cables are limited by their length, while wifi signals can travel much farther. If you have a long-distance between your devices and your router, your Ethernet connection will be slower than if you were closer to the route.

There are other factors that can contribute to this difference as well. For example, if there are walls or other obstacles between the devices and the router, that will also slow down the Ethernet connection. Wifi signals can pass through walls more easily than Ethernet cables can.

So if you’re experiencing slower-than-expected Ethernet speeds, check to see how far away your devices are from your router.

2. Congestion

Your Ethernet connection may be slower than your WiFi because of congestion. When multiple devices are trying to use the same network connection, the data rate for each device slows down. This is called congestion. WiFi is a wireless technology that doesn’t have as many limitations as Ethernet, so it can handle more devices without slowing down.

3. Interference

There could be a number of reasons why your Ethernet connection is slower than your WiFi connection. One possibility is interference. Interference can come from a variety of sources, including other electronic devices, appliances, and even the weather.

Electronic devices can cause interference in two ways: by emitting electromagnetic radiation or by creating electrical fields. Electrical fields are created when an electric current flows through a conductor, such as a wire. The strength of the field depends on the current and the distance between the conductor and the object it’s affecting.

Appliances can also cause interference. Some appliances, like refrigerators and microwaves, generate strong magnetic fields. Others, like televisions and computers, create electric fields. The stronger the magnetic or electric field, the more likely it is to cause interference with electronic devices.

Finally, interference can also be caused by weather conditions.

4. Hardware

There are a few reasons why your Ethernet connection might be slower than your wifi connection. One reason is that wifi is a wireless technology, which means that the signal does not have to travel through any wires. This makes wifi faster than Ethernet because there are no physical barriers slowing down the signal.

Another reason is that wifi uses radio frequencies to communicate, while Ethernet uses cables. Radio frequencies can travel farther and faster than cables, which means that they are better suited for wireless connections.

Finally, many devices use wifi connections these days because they are faster and more reliable than Ethernet connections. If you have a lot of devices connected to your network, they may be using up all of your bandwidth and causing your Ethernet connection to slow down.

5. Port Speed

Your Ethernet connection may be slower than your WiFi connection for a few reasons. One reason might be that your Ethernet port is not running at full speed. Most Ethernet ports are capable of running at 10 or 60 Mbps, but some older ports may only run at 1 Mbps.

To check the speed of your Ethernet port, open a command prompt and type “netstat -an”. Look for the “Local Area Connection” entry and look for the “Bytes Received/Sec” and “Bytes Sent/Sec” values. If the values are close to (or less than) 1000, then your port is running at 1 Mbps. To fix this, you can either update the driver for your network adapter or use a different Ethernet cable.

6. Duplex Mismatch

It’s not uncommon for Ethernet to be slower than wifi, especially in homes with multiple devices competing for bandwidth. One of the reasons for this discrepancy is a duplex mismatch. A duplex mismatch is when the devices are configured to use different transmission speeds. 

For example, your computer may be set to transmit at 100 Mbps while your router is set to receive at only 10 Mbps. This mismatch can cause a significant slowdown in network performance. There are a few ways to troubleshoot and resolve a duplex mismatch. 

The easiest way is to change the speed on one of the devices. You can also try changing the channel on your router or moving your devices closer to the router. If none of these solutions work, you may need to upgrade your router or switch to a different type of Ethernet cable.

7. Bad Cabling

Ethernet cables are thicker and less flexible than Wi-Fi antennas, which can lead to signal degradation over long distances. Additionally, Wi-Fi signals can travel through walls and other obstacles, while Ethernet signals are limited to the cable itself. 

If you’re noticing a big difference in speed between your Ethernet and wifi connections, it might be time to re-cable your home or office. Make sure to use quality cables that are long enough for your needs, and avoid running them alongside power lines or other electrical wiring.


In conclusion, there are several reasons why your Ethernet connection might be slower than your WiFi. One reason is the distance between your devices. Another reason is that WiFi signals can travel through walls and other obstacles, while Ethernet signals cannot.

Finally, the type of router you are using and the speed of your Internet connection can also affect the speed of your Ethernet connection. If you are experiencing slower speeds with your Ethernet connection, try some of these tips to see if you can improve the performance.