FM vs internet radio: what's the difference?

Updated October 21, 2026 · World Radio Stations · 8 min read

FM radio is broadcast over the air from a local transmitter: it is free, uses no data and is almost instant, but you only get the stations within range. Internet radio streams audio over a data connection: you can hear tens of thousands of stations from anywhere, with song titles and favourites, but it needs a connection, uses data and runs behind live. Neither is simply better — it depends on where you are and what you want to hear. Digital broadcast radio (DAB+ and HD Radio) sits in between.

How FM and internet radio work

FM radio (frequency modulation) sends sound on a radio wave, in most countries somewhere between 87.5 and 108 MHz. A transmitter on a mast or hilltop sends the signal and any FM receiver within range picks it up through its antenna. Coverage depends on transmitter power, the height of the antenna and the terrain, so a big station may cover a city and the surrounding region while a low-power community station may reach only a few kilometres.

Internet radio turns the studio’s audio into compressed digital data — usually MP3 or AAC — and sends it to a streaming server. Your phone, computer or smart speaker connects to that server and plays the audio as it arrives. Distance doesn’t matter, only your connection. Our explainer on how internet radio works goes deeper.

Many stations do both, broadcasting on FM and streaming the same programme online. That’s what people usually mean by “internet FM”: an FM station’s live stream, which you can play for thousands of stations in our player.

FM vs internet radio at a glance

Sound quality

FM can sound excellent. With a strong signal you get stereo audio up to about 15 kHz — the upper limit is set deliberately so the audio doesn’t interfere with the 19 kHz pilot tone that tells receivers a broadcast is in stereo. The weakness is reception: hiss creeps in at the edge of coverage, and in cars and among tall buildings reflected signals cause distortion and flutter.

Internet radio quality depends on the bitrate a station chooses. A 128 kbps MP3 stream sounds fine for most listening; AAC is more efficient, so it usually sounds better at the same bitrate, and at 192 kbps and above most listeners will struggle to hear a difference from the source. A few stations go further: Radio Paradise, for example, offers lossless FLAC streams. Low-bitrate streams (32–64 kbps) are designed to save data and work on weak connections, and can sound thin on music. And unlike FM, there’s no static or fading — until your connection stalls.

Range and station choice

This is the biggest difference. FM spectrum is limited, so in any one place you’ll find perhaps a few dozen stations, and they disappear as you drive out of range. Internet radio has no such limit: the open Radio Browser directory behind our player lists tens of thousands of stations. Want jazz from New York, news from Ireland or pop from Tokyo? Pick a country on the globe or open a country page such as /country/ie or /country/de.

Data use and cost

FM uses no data at all. Internet radio is free to listen to but uses data, and the amount follows directly from the bitrate:

Most music streams fall in the 96–192 kbps range, so expect roughly 45–90 MB an hour — around 1–2 GB a month if you stream for an hour every working day. On Wi-Fi this rarely matters; on a capped mobile plan it adds up, which is why some apps let you pick a lower-quality stream for mobile data.

Reliability and latency

FM is hard to beat for dependability. A battery radio needs no network, account or server, which makes it useful in emergencies, power cuts and remote areas. Internet radio relies on a chain — your connection, the mobile network, the station’s server — and any link can fail.

Streams also run behind live. Players buffer a few seconds of audio to ride out network hiccups, and HTTP Live Streaming (HLS), which many big broadcasters use, sends audio in chunks that add more delay. In one test by tech news site GeekWire during a Major League Baseball game, smartphone audio streams were at least 30 seconds behind the action, while a cheap AM transistor radio was only a few seconds behind. If you follow live sport alongside a TV picture or a stadium crowd, analog radio wins.

The middle ground: DAB+ and HD Radio

Digital broadcast radio combines over-the-air reception — no data, no subscription — with some of the extras of streaming.

DAB and DAB+

DAB (Digital Audio Broadcasting) carries several stations together in one block of spectrum called a multiplex, so a single transmitter can deliver many more stations than FM can. The original DAB used the older MP2 codec; the upgraded DAB+ uses the much more efficient HE-AAC v2, and most DAB broadcasting now uses DAB+. Older DAB-only radios can’t decode DAB+, so check before buying. DAB+ is common across Europe and in Australia’s major cities, and in 2017 Norway became the first country to switch off its national FM networks in favour of DAB+ (most local stations stayed on FM). Reception is clean until the signal gets too weak, when it cuts out rather than hissing, and it typically runs a few seconds behind FM.

HD Radio

HD Radio is the digital system used mainly in the United States, and also in Canada, Mexico and the Philippines. Developed by iBiquity, now part of Xperi, it sends a digital signal alongside the normal analog one on the same frequency, so old radios keep working. FM stations can add extra channels, called HD2, HD3 and HD4. On the main channel, an HD radio blends back to the analog signal when the digital one weakens; the extra channels simply go silent. To make that blend seamless, the analog audio is delayed to match the digital stream — often by around eight seconds.

Which should you choose?

• For local stations in the car: FM, or DAB+/HD Radio if your car has it. No data, no fiddling.
• For live sport: analog FM or AM, which is closest to real time.
• For stations from another country or niche genres: internet radio — nothing else comes close. See how to listen to radio from another country.
• At home on Wi-Fi: internet radio, for the widest choice and extras like song titles and favourites.
• For emergencies and power cuts: keep a battery FM radio in the house.

You don’t have to pick one: plenty of people use FM in the car and stream at home, and with a web player the whole world of internet radio is already in your browser. For the bigger picture, read why radio still matters.

FAQ

Is internet radio better than FM?

It’s better for choice and features: thousands of stations, song titles and favourites, from anywhere. FM is better for cost and reliability: no data, no connection needed, and almost no delay. Many listeners use both.

What does “internet FM” mean?

It usually means listening to an FM station’s live stream over the internet. Most FM stations simulcast online, so you can hear them anywhere in the world through their website, an app or a web player like ours.

How much data does internet radio use?

It depends on the bitrate: about 43 MB an hour at 96 kbps, 58 MB at 128 kbps and 86 MB at 192 kbps. A high-quality 320 kbps stream uses about 144 MB an hour.

Does internet radio sound better than FM?

At 128 kbps and above, a good stream usually sounds at least as good as FM, and without static or fading. Very low-bitrate streams can sound worse than a strong FM signal.