2.4 GHz vs. 5 GHz Wi-Fi: What’s the Difference?

Choosing the right Wi-Fi band can often greatly impact your internet speeds.

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Last Updated: Nov 22, 2023
Stylistic image of a home covered in Wi-Fi
Every device in your home connects to either the 2.4 GHz or the 5 GHz network.
  • The 2.4 GHz Wi-Fi band covers more area but at slower speeds, while 5 GHz provides higher speeds with a shorter range.
  • For tasks requiring high bandwidth close to the router, like streaming or gaming, use 5 GHz; for broader coverage, 2.4 GHz is preferable.
  • The 5 GHz Wi-Fi band is less congested, offering a clearer channel and less interference, which is ideal for environments with many networks.

Chances are that your home router creates two Wi-Fi networks: a 2.4 GHz (gigahertz) one and a 5 GHz one. The 2.4 GHz band has a longer transmission range but offers slower speeds. The 5 GHz band covers a shorter distance and provides the fastest speeds. In this guide, we will cover which band is best for you and uncover all the differences between these two technologies.

Understanding 2.4 GHz and 5 GHz Bands

In your home, the choice of Wi-Fi frequency band — 2.4 GHz or 5 GHz — plays a pivotal role in determining the speed and reliability of your internet connection.

Many people are unaware that there are even two bands until they see them pop up on their computer or mobile device. When connecting a new device to your Wi-Fi home network, you may see two to three different options.

For example, let’s say that your Wi-Fi name is “AdamsFamily.” When looking to connect, you might find “AdamsFamily,” “AdamsFamily2.4G,” and “AdamsFamily5G,” or something similar.

The main differences that the wireless frequencies provide become apparent when looking at the range and speed of the two. The 2.4 GHz band is great for connecting over longer distances but offers slower speeds due to more traffic on the network. On the other hand, the 5 GHz band offers coverage for shorter distances but provides users with faster speeds.

Another important difference is that the 2.4 GHz band just can’t support as many devices and can quickly become bogged down. While the 5 GHz band is newer and offers more channels than the 2.4 GHz band, it can’t reach as far.

Rule of Thumb: Use 5 GHz When You Can

The 5 GHz Wi-Fi band is faster and less affected by interference, though it has a shorter range and struggles with walls. It’s best to use it with a strong signal, especially in crowded places like apartments with many routers nearby.

If your main devices are close to your router, try to keep them on the 5 GHz network. Less important devices (or ones positioned farther from the router) can be put on the 2.4 GHz network.

2.4 GHz Wi-Fi: Old Faithful, Great Range

The 2.4 GHz Wi-Fi band utilizes longer wavelengths, allowing it to cover greater distances and penetrate physical barriers more effectively. However, its widespread use in various household devices can lead to congestion and interference, impacting connectivity and speed.

Pros of 2.4 GHz

  • Better range
  • Better penetration through walls and other obstructions

Cons of 2.4 GHz

  • Slower speeds
  • More susceptible to interference from other electronic devices.

Ideal use cases: The 2.4 GHz band is best suited for larger homes or settings where Wi-Fi needs to travel through multiple walls or floors. If your bedroom is far away from your router, this is the band you’ll want to use for your personal devices.

5 GHz Wi-Fi: Fastest Speeds, Shortest Range

The 5 GHz band can transmit data more rapidly. However, its shorter wavelengths mean it cannot pass through solid objects as easily, limiting its range.

Pros of 5 GHz

  • Higher data transmission speeds
  • Less susceptible to interference

Cons of 5 GHz

  • Shorter range
  • Reduced effectiveness in penetrating solid objects

Ideal use cases: Recommended for smaller spaces or for activities requiring high bandwidth, such as online gaming and HD video streaming.

Image of a Wi-Fi router with 4 green lights.
Cell phones and other mobile devices may be best for the 2.4 GHz network, while dedicated PCs and TVs may be ideal for 5 GHz, depending upon their location in your home.

What Is a Dual-Band Router?

Put simply, a dual-band router is a router that broadcasts two separate signals. This technology typically shows up in most 802.11ac Wi-Fi routers. If you have a newer router, it will likely run the dual-band technology and offer two different bands: 2.4 GHz and 5 GHz.

Choosing the Right Band for Each Device

Different scenarios call for different Wi-Fi bands. In larger homes or buildings with many physical barriers, the 2.4 GHz band is often more effective. Conversely, in smaller spaces or for high-bandwidth activities, the 5 GHz band is preferable.

The Size of Your Home

The size of your home plays a big role in determining what band you should use. For users with larger homes, the 2.4 GHz band may be a better choice to provide the entire home with coverage.

For smaller living spaces such as a condo or apartment, 5 GHz is great for fast internet speeds. Along with this, it will also prevent interference from the many networks around you.

However, if you want to take advantage of the 5 GHz band in a larger home, consider investing in a Wi-Fi network extender. This device will give you greater coverage while reaping all the benefits of the 5 GHz band.

If your router separates the two bands, make sure you’re connecting your devices to the best band for them, taking into account their proximity to the router.

Stylistic cutaway image of a house showing its Wi-Fi signals
The devices farthest from your router will often be better suited to the 2.4 GHz network.

Possible Wi-Fi Interference

If interference from other technological or household devices is a recurring problem, switching to the 5 GHz band may be best. Unfortunately, the 2.4 GHz band is more prone to interference from everyday devices such as microwaves and garage door openers.

Number of Devices

If you have several devices already utilizing the 2.4 GHz band, your internet connection speed can slow to an intolerable pace.

If you find yourself dealing with this issue, the 5 GHz band may be a better option. As long as the devices are close to the router, this should give you faster performance. As stated earlier, the 5 GHz band offers more channels, which means there is less chance of running into interference.

Type of Devices Used

It’s also crucial for users to consider the types of devices they have and their uses when planning out which Wi-Fi band to utilize. Remember that the 2.4 GHz band uses longer waves to transmit through walls and floors. Normal activities like surfing the web and checking the latest YouTube videos will work just fine on the 2.4 GHz band — and if you’re doing those things on your smartphone in your backyard, then the 2.4 GHz band may work even better than the 5 GHz band would.

However, if you’re a serious online gamer or plan to stream HD movies, you may choose the 5 GHz band, as it has a higher bandwidth better suited for these activities. Certain devices in your household may be able to connect to the 2.4 GHz band only. Or in some cases, some devices may move out of the 5 GHz range but still be in the range of the 2.4 GHz band. By using both bands simultaneously (on different devices, of course), you can use your network to its full potential.

5G vs. 5 GHz Wi-Fi: Two Different Technologies

While the terms 5G and 5 GHz are both used to discuss internet access, the similarities end there. When using the term 5G, people are often referring to 5G cellular internet, which is very different from 5 gigahertz, a Wi-Fi baseband.

5G internet service is the latest in mobile broadband that lets you experience faster download and upload speeds and lower latency compared to 4G LTE. Users can now experience 5G home internet, but it’s available only to a small portion of residents in the U.S.

Technical Insights: Frequency, Wavelength, and Channels

We know that the 2.4 GHz band offers better range at lower speeds while the 5 GHz band offers higher speeds at a more limited range. But why do the bands work this way?

The relative strengths of these two bands come down to wavelength and channel availability.

Wavelengths and Frequencies

Longer wavelengths are just what they sound like: They have longer distances between crests of each wave. Longer wavelengths allow signals to travel farther. Longer wavelengths are less likely to interact with the mediums they travel through — to run into stuff, in a manner of speaking — so they tend to lose less energy over distances. Shorter wavelengths are just the opposite. They’re more likely to interact with the mediums they’re traveling through.

For one extreme example, consider nuclear radiation. It has a very short wavelength, so it interacts heavily with the mediums that it travels through. If that medium were to be your body, you’d have a very unpleasant time. Yet it’s perfectly safe to stand in front of your TV antenna (or your car radio, or your wireless router), because the wavelengths those broadcasts use are so very long by comparison.

A band’s wavelength also determines its data transmission capabilities. This is where shorter wavelengths shine: They diffract less than longer wavelengths do. Diffraction is basically a fancy way of saying “spreading out” — you can think of shorter wavelengths as being more focused than longer ones. Less diffraction means that shorter wavelengths can preserve finer details in their broadcasts.

An everyday example that puts all of this together is the difference between AM and FM radios. FM radio uses a shorter wavelength. FM stations are great for music, because that shorter wavelength preserves all the details of a recording. But AM stations, which use longer wavelengths, have better range. When reach is more important than audio quality, as is often the case with news stations, AM is a sensible choice.

As we know, there’s a similar relationship between 5 GHz and 2.4 GHz Wi-Fi bands. You can think of 2.4 GHz Wi-Fi as the AM radio of Wi-Fi bands!

Wi-Fi Channels

One reason the 5 GHz Wi-Fi band handles multiple devices better than the 2.4 GHz band is that it has more channels. What does this mean, exactly?

The key to understanding channels is knowing that your devices are not using exactly the same frequency to communicate with your router. Being on precisely the same frequency would be like sharing a walkie-talkie channel; it would lead to a lot of interference and confusion. In reality, the two bands of frequencies we are talking about are divided into channels — frequencies within the band that are assigned to individual devices as needed.

In theory, there are nearly infinite frequencies to use. In reality, though, frequencies that are too similar will interfere with each other. There needs to be enough space between each assigned frequency to keep things orderly, so each channel is more like a small range of frequencies — a mini-band within the larger band. Each of these mini-bands is a channel.

The 5 GHz band has more non-overlapping channels than the 2.4 GHz band does, which reduces the likelihood of interference and congestion from other devices. This is particularly beneficial in densely populated areas, where many networks operate simultaneously. (Your neighbor’s network is separate from yours, of course, but their router will be using similar frequencies!)

The 2.4 GHz band, while it has fewer channels, is more widely used due to its compatibility with a greater number of devices and its extended range, which can result in more congestion and potential interference, affecting the stability of the connections.

The Future of Wi-Fi: Introducing Wi-Fi 6E (and Wi-Fi 7)

Wi-Fi 6E and Wi-Fi 7 are the next leaps in Wi-Fi technology, utilizing the 6 GHz band to offer even faster speeds and more efficient data transmission. This development promises to enhance wireless connectivity, especially in environments with high-density Wi-Fi usage.

When these become more widely adopted, the 6 GHz band will become another consideration when configuring your home network setup. Your most important devices might be best positioned on it instead, as it offers the best overall stability and speeds.