2.4 GHz vs 5 GHz WiFi: Which Should You Use?
Use 5 GHz for anything that needs speed (streaming, gaming, video calls) when you’re within a room or two of the router. Use 2.4 GHz for long range and for smart-home devices. 6 GHz (WiFi 6E and 7) is the fastest and cleanest, but only reaches about the same room.
The quick comparison
| 2.4 GHz | 5 GHz | 6 GHz | |
|---|---|---|---|
| Range | Longest | Medium | Shortest |
| Through walls | Best | OK | Weak |
| Typical real-world speed | 20–150 Mbps | 200–900 Mbps | 500 Mbps–2 Gbps |
| Interference | High | Low | Very low |
| Non-overlapping channels | 3 | About 25 (by region) | Up to 59 (by region) |
| Device support | Everything | Most phones and laptops since ~2013 | WiFi 6E and WiFi 7 devices only |
Real-world speeds depend on your router, device and distance. Measure yours with the WiFi speed test on each band.
Why 2.4 GHz is slower but reaches further
Lower frequencies pass through walls and floors more easily, so 2.4 GHz covers more of your home. But it has only three non-overlapping channels (1, 6 and 11), and it shares the airwaves with your neighbours’ WiFi, Bluetooth, baby monitors and microwave ovens. That crowding is why 2.4 GHz often feels slow even with a strong signal.
Why 5 GHz is faster
5 GHz has many more channels and they can be combined into wider ones (80 or 160 MHz), which carry far more data. There’s also much less interference. The trade-off is range: each wall weakens 5 GHz more, so speed drops off faster as you move away.
What about 6 GHz?
6 GHz arrived with WiFi 6E and is used by WiFi 7. It’s a big, clean band with almost no interference, which makes it the best for gaming and VR in the same room as the router. You need both a 6E/7 router and a 6E/7 phone or laptop to use it.
Which band for which device?
- Gaming PC or console: Ethernet first, then 5 or 6 GHz. See how to reduce ping.
- Smart TV, laptop, phone near the router: 5 GHz.
- Devices at the far end of the house or garden: 2.4 GHz.
- Smart plugs, bulbs, cameras, printers: 2.4 GHz. Many only support it.
Should I split my bands or use one name?
Most routers offer “band steering” or “Smart Connect”, which uses one network name and moves devices between bands automatically. It’s convenient and works well on modern routers. Split the bands into two names (for example “Home” and “Home-5G”) if:
- a smart-home device won’t set up (it needs 2.4 GHz only), or
- a device keeps sticking to 2.4 GHz when it should be on 5 GHz.
Change it in your router’s wireless settings; the router login finder shows how to get there.
How to pick the best channel on each band
On 2.4 GHz use 1, 6 or 11. On 5 GHz, 36–48 and 149–161 work with every device. The best WiFi channel finder shows the recommended channels for each band, and our guide to WiFi signal strength helps you check coverage after you switch.