BPM Finder for any audio — get the tempo from your MP3 in seconds.
Upload an MP3 or WAV and ChordSonic reads the tempo, the beat grid and the musical key in a single pass. Most BPM finders stop at the number — you also get the key and the chord chart, free, on the same upload.
Upload once. Get tempo, beats and key together.
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 a single upload returns three answers, not one.
- 01
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.
- 02
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.
- 03
Key
Major or minor
The same upload also returns the musical key — A minor, F# major, and so on. This is the wedge over tap-tempo widgets and BPM-only sites: tempo and key are usually needed together (DJ setlists, sample matching, songwriting), and tapping along to get one then guessing the other is the wrong way to do 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.
- 01
Upload
Drag an MP3 or WAV — up to 50 MB, about 10 minutes per track. The file stays tied to your account; nothing public unless you choose to share the link.
- 02
Analyze
ChordSonic's pipeline separates the percussive and harmonic content, tracks the beat grid, and locks in the dominant tempo. The same pass detects the musical key and the chord progression.
- 03
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 and the key on the same upload, drop both into your tag editor or library tool, and the next mix is already half planned. No more tapping along to a 30-second preview to guess the tempo.
Producers checking a reference
Found a track whose groove you want to chase? Get the exact BPM, lock your project tempo, and start matching. Knowing the key at the same time tells you whether the harmonic vibe transfers to your in-progress song or not.
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.
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) or use the original MP3 or WAV, then upload it. We accept MP3 and WAV up to 50 MB and about 10 minutes per track. 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 and BPM together?
Yes — that is the whole point of running it through ChordSonic. The same upload returns the tempo (BPM), the beat grid, the musical key (major or minor) and the full chord progression. Most BPM-only sites and tap-tempo widgets stop at the number; you get the chart too, for free, on the same page.
What file formats and lengths are supported?
MP3 and WAV, up to 50 MB and about 10 minutes per track. 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 20-minute live recording rarely changes the dominant BPM, but a shorter clip processes faster.
Find the BPM of your track now.
Drop an MP3 or WAV. Get the tempo, the beat grid and the musical key on one page. Free, no credit card.