BPM Finder

Drop a song or press Listen. You get its tempo in BPM, then a click track to practise it at that speed.

Find the tempo

Runs on this device

MP3, WAV, M4A, FLAC or OGG, up to 20 at once. Files are read by your browser, never uploaded. Only on Spotify or YouTube? Press Listen and play the song out loud.

How to get the BPM of a song

Pick one or more audio files (MP3, WAV, M4A, FLAC, OGG) or drag them onto the box. Each file is measured in turn and listed under the result, so you can line up a whole set list and tap any finished song to see its tempo again. For music you can only stream, press Listen and play it through a speaker for 20 seconds, or on desktop Chrome or Edge share the tab that is playing it.

The measurement runs in your browser on your own device. Your audio is never uploaded, and the samples are thrown away as soon as the number is on screen.

Half time, double time and the number you count

Tempo detection finds the pulse, but people count the same pulse at different speeds. A shuffle at 75 BPM can be felt as 150, a drum and bass track at 174 as 87. When the half or double value would also be a normal counting tempo (between 70 and 180 BPM), three buttons appear: Half, Measured and Double. Choose the one that matches where you would tap your foot; the practice click, the copied text and the address bar all use your choice.

The confidence word shows how steady the beat was. "Low confidence" usually means a free-time intro, a song without drums or a very short clip; analyse a longer stretch, or tap along with the tap BPM counter to check.

Practise at the song tempo

Under the result sits a small metronome set to the song. With the speed trainer on it starts at 70 % of the tempo and climbs about 5 % every 4 bars until it reaches the song speed: a fast strumming part at 140 BPM starts at 98, goes up 7 BPM at a time and is at full speed after 24 bars. Turn the trainer off to play along at full tempo, or open the full metronome for time signatures, subdivisions and strum patterns (and read how to read strumming patterns first).

A good routine: learn the chord changes slowly, then practise with the trainer three or four times, and stop one step below the tempo where it starts to fall apart. Clean repetitions at a lower speed get you to the record faster than messy ones at full speed.

How reliable is the number?

Tested on 351 labelled loops from the Freesound Loop Dataset that were held out from tuning, the BPM finder hit the labelled tempo within 2 % in 72 % of loops, and 87 % were right once half and double time count. Loops with drums came out at 78 %, loops without drums at 64 %. Full figures and confidence intervals are on the accuracy page.

The result also shows the song's key. Follow the link next to it to open the song key finder on the same song, with the chords and the easiest capo.

FAQ

Why does it offer half and double the tempo?

A beat can be counted at two speeds: a ballad at 70 BPM can feel like 140, a fast punk song at 180 like 90. Both numbers describe the same music, so pick the one you would tap your foot to.

What if the song has no drums?

Tempo is harder to read without drums; strummed guitar and piano usually work, ambient pads and free-time intros do not. If no steady beat is found, the result says so and you can tap the tempo instead.

Does it handle songs that speed up?

It reports one tempo for the analysed stretch (the whole file, or the middle 90 seconds of a file longer than 15 minutes). Live recordings that drift will land near the average.

How do I practise a song that is too fast?

Start the practice click under the result: the speed trainer begins at 70 % of the song tempo and adds a little every few bars until you reach the full tempo.

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