BPM Finder for any audio — get the tempo from your MP3 in seconds.
Upload an MP3 or WAV and ChordSonic reads the tempo and the beat grid straight from the audio. No tapping along to a button, no counting bars against a stopwatch — the beat markers land on the timeline where you can check them.
Upload once. Get the tempo and the grid behind it.
Almost every tool in this space gives you only the BPM, and usually wants you to tap along to a button. ChordSonic runs the analysis on the audio itself, so you get the number, the grid it came from, and the rest of the chart with it.
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Tempo (BPM)
The number you came for
ChordSonic reports the dominant tempo in beats per minute, rounded to the nearest integer. Reliable to within about one BPM on clean 4/4 recordings — pop, rock, hip-hop, electronic, dance. Tempo-shifting tracks, rubato performances and very old recordings are harder, and we say so explicitly rather than hiding it behind a single number.
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Beats
Per-bar grid and downbeats
Alongside the tempo, you get the full beat grid — every beat positioned in time, with downbeats marked. That is what makes the BPM verifiable: scrub the timeline and the beat markers should land on the snare, the kick or the strum. If they drift, you can see it; you are not staring at a black-box number.
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Chords and key
Along for the ride
The same pass also returns the chord progression and the musical key, because the analysis works them out anyway — tempo and key are usually wanted together. That side has its own page: the key finder covers how a key is read from a recording and how far to trust it.
From audio to BPM in about a minute.
No browser plugins, no app install, no tapping along to the beat. Modern beat-tracking runs server-side and the answer arrives ready to use.
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Upload
Drag an MP3 or WAV — up to 15 MB (25 MB with a free account). The file stays tied to your account; nothing public unless you choose to share the link.
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Analyze
ChordSonic's pipeline separates the percussive content from the harmonic content, tracks every beat, marks the downbeats and locks in the dominant tempo of the recording.
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Export
Read the BPM, scrub the beat markers on the timeline, copy the value into your DAW. Need more? Export the full chart as TXT, CSV or JSON.
Who uses a BPM finder, and why.
DJs beatmatching a new track
Pull the BPM off the file itself and drop it into your tag editor or library tool, so the next mix is planned against a real number. No more tapping along to a preview and hoping the average was close enough.
Producers checking a reference
Found a track whose groove you want to chase? Read its tempo from the audio, lock your project to it, and start matching. The beat grid also shows you where the reference pushes or drags, which a single number never will.
Drummers practicing to a click
Set the metronome to the song's real tempo, not a guess. Loop a section, count four bars against the click, and the beat markers on the timeline will confirm whether the BPM matches before you commit to a week of practice at the wrong number.
Songwriters confirming a demo
Recorded a voice memo of an idea with no click? Upload it, get the tempo it actually settled at, and rebuild it in your DAW at that BPM. The original feel survives; the timing tightens up.
Tap the tempo instead.
Nothing to upload — a band in the room, a record on the turntable, a groove stuck in your head? Tap along and read the BPM off your own taps. It measures your hand rather than the recording, so it will not settle half-time against double-time the way the analysis above does, but when there is no file it is the only measurement there is.
No tempo yet.
Nothing measured yet.
Tap the spacebar or the button in time with the beat.
More about tapping, and what it can and cannot tell you, on the tap tempo counter.
Frequently asked
How accurate is the BPM detection?
On clean, straight 4/4 recordings — most pop, rock, dance, hip-hop and electronic tracks — we land within one BPM of the true tempo around 95% of the time. Accuracy drops on tempo-shifting recordings, rubato performances, swung 16ths interpreted as straight, and very old recordings where the click drifts. The reported tempo is always a starting point you can verify by counting four bars against a metronome at that BPM.
Will it work for songs that change tempo?
It returns the dominant tempo — the BPM the track sits at for most of its length. If a song has a slow intro that doubles up for the chorus, or a half-time bridge, you get the prevailing value, not a per-section breakdown. For songs with a deliberate accelerando or ritardando across the whole piece, treat the result as an average and use the beat grid on the timeline to see where the tempo actually drifts.
Can it find the BPM of a song from YouTube?
Not directly — we need an audio file. Download the audio legally (your own purchase, Bandcamp, a creator's official download), then upload it. We accept MP3, WAV, M4A, MP4, FLAC and AIFF. Up to 15 MB and 5 minutes without an account, or 25 MB and 8 minutes with a free one. Most single songs fit comfortably.
What about songs with half-time or double-time feels?
Tempo is genuinely ambiguous at the octave — a track that feels like 75 BPM with a half-time snare can equally be analyzed as 150 BPM with a backbeat on the 3. We report the dominant tempo from the beat analysis, and you can halve or double it manually if your use case (DJing, click track, drum loop selection) wants the other interpretation. Drum-and-bass at 170 vs hip-hop at 85 is the classic example.
Does it find the key as well as the BPM?
Yes — the same upload returns the musical key and the chord progression alongside the tempo, because the analysis works all of it out in one pass. That is the difference worth knowing about: a BPM reading on its own, however you arrive at it, is one number, while the file you already uploaded can answer several questions at once. If the key is what you actually came for, our key finder page covers that side properly: how the key is read out of the audio, where it is reliable and where it is not, and what to do about the classic relative-major confusion.
What file formats and lengths are supported?
MP3, WAV, M4A, MP4, FLAC and AIFF. Up to 15 MB and 5 minutes without an account, or 25 MB and 8 minutes with a free one. That covers almost every single song at typical bitrates. If your file is longer, trim it to the section whose tempo you actually care about — an outro fade or a long live recording rarely changes the dominant BPM, but a shorter clip processes faster.
Create your own music
Generate unique new tracks of your own — built from the key, tempo and chords of any song you upload.
Find the BPM of your track now.
Drop an MP3 or WAV and get the tempo and the beat grid on one page. Free, no credit card. Looking for the key instead? That lives on the key finder. Once you have a tempo, the BPM to ms calculator turns it into delay and reverb times.