Bluetooth Channel Frequency List and Range Explained

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ism band

Bluetooth operates in the 2.4 GHz ISM band, dividing the spectrum into multiple channels for robust and interference-free communication. This document provides an overview of Bluetooth frequency allocations, covering channel classifications for different Bluetooth versions, frequency hopping, and channel utilization. The bluetooth channels list is a crucial reference for understanding how Bluetooth technology allocates and uses the radio frequency spectrum.

The Bluetooth frequency range spans from 2.400 GHz to 2.4835 GHz. This range is divided into 79 channels, each with a 1 MHz bandwidth. In Bluetooth Low Energy (BLE), there are 40 channels, each with a 2 MHz bandwidth.

The 79 channels with 1 MHz bandwidth are used across the US, Europe, and many other countries. Japan, Spain, and France utilize a smaller set of 23 Bluetooth channels.

The following table outlines the Bluetooth channel frequencies used in different regions:

RegionBluetooth Frequency rangeBluetooth Channels
US, Europe, Rest of World2.4 to 2.4835 GHzf=2.402 + n, MHz (n = 0 to 78)
Japan2.471 to 2.497 GHzf = 2.473 + n, MHz (n = 0 to 22)
Spain2.445 to 2.475 GHzf = 2.449 + n, MHz (n = 0 to 22)
France2.4465 to 2.4835 GHzf = 2.454 + n , MHz (n = 0 to 22)

Bluetooth Channels List

Below are the absolute frequencies for each of the 79 Bluetooth channels:

Channel No.Frequency (MHz)Channel No.Frequency (MHz)
02402402442
12403412443
22404422444
32405432445
42406442446
52407452447
62408462448
72409472449
82410482450
92411492451
102412502452
112413512453
122414522454
132415532455
142416542456
152417552457
162418562458
172419572459
182420582460
192421592461
202422602462
212423612463
222424622464
232425632465
242426642466
252427652467
262428662468
272429672469
282430682470
292431692471
302432702472
312433712473
322434722474
332435732475
342436742476
352437752477
362438762478
372439772479
382440782480
392441--

Note: For BLE, there are 40 channels spaced 2 MHz apart, ranging from 2402 MHz to 2480 MHz. BLE uses 3 advertising channels (37, 38, and 39) and 37 data channels. The advertising channels are strategically positioned to avoid frequencies commonly used by Wi-Fi.

Conclusion

Understanding the Bluetooth channel frequency list is crucial for optimizing device performance and avoiding interference in crowded frequency bands. With this detailed breakdown of channel allocations and usage, you can ensure efficient Bluetooth communication and avoid potential disruptions in wireless connectivity.

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