What's the Best Frequency for an FM Transmitter in the UK

What’s the Best Frequency for an FM Transmitter in the UK?

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An FM transmitter allows you to stream audio from your phone through your car speakers using Bluetooth.

It effectively turns your phone or other portable devices into a mini radio station that only broadcasts a few metres.

To work, the FM transmitter needs to be tuned to a free FM frequency on your car radio that doesn’t have a radio station broadcasting on it.

Some FM transmitters, such as the Belkin TuneCast will automatically select the clearest FM frequency for you.

However, with others, you will need to set the frequency yourself. This can be difficult if you live in a city, as most of the frequencies will have been used up.


Best FM Transmitter Frequency in the UK

The best frequency for an FM transmitter in the UK is usually 87.5. This is because frequencies from 87.5-88 are reserved for short-term services using a Restricted Service Licence, so regular stations don’t use them.

In London, however, this frequency is often used by pirate radio stations and it might be harder to find a free frequency.

Another good frequency to try is 108, but again this might already be used up in certain areas of London.

If you have any suggestions for free frequencies in your area, please leave a comment below.


How FM transmitters work

Most FM transmitters on the market at the moment work using Bluetooth. Using a Bluetooth FM transmitter typically involves four steps:

  1. Plug the transmitter into a power source (usually the cigarette lighter socket)
  2. Tune your car radio to an unused frequency
  3. Tune the FM transmitter to the same frequency
  4. Pair your phone or another device with the FM transmitter using Bluetooth

Some older FM transmitters don’t use Bluetooth and instead plug into your phone or iPod’s headphone socket.


Unused FM Frequencies in the UK


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3 thoughts on “What’s the Best Frequency for an FM Transmitter in the UK?”

  1. I’m a courier based in London. Following your advice and after spending bountiful amounts of time in traffic scanning other possible frequencies, 87.5 is certainly the clearest. 105 is clear also. However, 108 picks up frequent static around the city.
    Many thanks 🙏🏻

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