Wi-Fi bands explained: 2.4, 5 and 6 GHz

Your router can send Wi-Fi on more than one radio band, and each band behaves differently. The 2.4 GHz, 5 GHz and 6 GHz bands are explained in plain words, so you can understand your router's settings and choose the right band for each device.

What a band is

Wi-Fi uses radio waves. A band is a range of radio frequencies set aside for them, measured in gigahertz (GHz). Think of each band as a separate road. Each road has its own length, speed and traffic. A router with several bands can use several roads at once.

Two rules explain most of the differences:

• A lower frequency usually travels farther and passes through walls better.
• A higher frequency has more room for data, so it can be faster, but it reaches less far.

The three bands compared

2.4 GHz

This is the oldest band. It reaches the farthest and handles walls better than the others. It is also the slowest on average, and the most crowded. Neighbors' networks, Bluetooth devices, cordless equipment and microwave ovens all use the same space. Many smart-home gadgets, such as plugs and some cameras, only work on 2.4 GHz.

5 GHz

This band is faster and usually less crowded, with more channels to choose from. Its range is shorter, and walls reduce it more. It suits laptops, phones, TVs and game consoles that sit in the same room as the router, or one room away. On some channels, a router must watch for radar and may change channel, which can cause a short drop in the connection. This is normal behavior required by the rules.

6 GHz

This band arrived with Wi-Fi 6E. A Wi-Fi 6E router and device can use the 6 GHz band in addition to 2.4 and 5 GHz. It has the most room and the least interference, but the shortest range, and walls hurt it most. Only devices with Wi-Fi 6E or Wi-Fi 7 can use it. Older devices cannot see it at all.

Which Wi-Fi version uses which band?

Newer routers work with older devices, and a device connects at the highest speed it supports.

Which band should I use?

• Far from the router, or behind several walls: 2.4 GHz usually holds a connection more steadily.
• Same room or the next room, and speed matters: 5 GHz.
• Close by, with a Wi-Fi 6E or Wi-Fi 7 device: 6 GHz.
• Old smart plugs, cameras and similar gadgets: 2.4 GHz.

Many routers use one network name for all bands and pick for you. That works well for most homes. If a device will not join, or keeps choosing a poor band, your router may let you give each band its own name. Look in the router's Wi-Fi settings, which differ by maker. See how to sign in to your router.

What this means for you

• Do not be alarmed by an old device that only shows 2.4 GHz. That is normal.
• When you buy a router or a device, "dual-band" means 2.4 and 5 GHz, and "tri-band" usually adds a third radio. Check the box for 6 GHz or Wi-Fi 6E and Wi-Fi 7 if that matters to you.
• The label on the box describes the ideal case. Test speeds in the rooms you use. See how to check your internet speed and why Wi-Fi is slow.
• Your internet plan sets the ceiling. A faster band cannot make a slow plan faster.

Frequently asked questions