BPM & Key Finder (Free)

Knowing a track's BPM (tempo) and key makes covers, mashups, arranging and practice planning a lot easier. This tool analyzes an uploaded track and estimates both automatically.

When to use it

• Check the original BPM and key before a karaoke session or cover practice
• Match the tempo of two tracks for a DJ set or mashup
• Check the tempo and key of a reference track while writing or arranging
• Find out what BPM to set your metronome to
• Estimate the key of a track with no sheet music

How to use

1. Upload the track you want to analyze.
2. It automatically detects the tempo (BPM) and estimated key (major/minor).
3. Set your metronome or tuner to the same BPM and key to practice along.
4. If a result looks off, try trimming to a section with a clear beat, such as the chorus, and analyze again.

Supported formats and limits

• Detectable tempo range: roughly 60–200 BPM
• Key estimation is a statistical method using a chromagram (note distribution) and a Krumhansl-Schmuckler key profile
• Very short tracks (a few seconds or less) may not have enough data and can error out
• Results are automatic estimates — tracks with irregular timing (rubato) or tempo changes mid-song will be less accurate

Tips for better results

• Sections with a clear rhythm (drums, beat) give more accurate BPM estimates. Try the chorus instead of a quiet intro.
• Free-tempo tracks like ballads may not get an exact BPM. Treat it as a reference only.
• Key estimation tends to work better on tracks with simple, clear harmony. Tracks with frequent key changes may come back as an overall average.
• The same track can read as double (or half) BPM depending on the arrangement (e.g., detected as 60 when it feels like 120). Correct it yourself if that happens.
• A live version and a studio version of the same song can measure slightly differently. Analyze the actual track you'll practice with.

Troubleshooting

• A "can't analyze" error usually means the file is too short. Try a section that's at least 20 seconds long.
• If the result feels off, the tempo may have been detected at half or double. Try clapping along by hand to compare.
• Tracks with prominent vocals can mask the rhythm instruments, which throws off key detection. Try a section with just the instrumental.
• Very quiet or ambient tracks with almost no rhythm may not return a tempo at all. This tool isn't a good fit for that kind of audio.

FAQ

Learn more

For a more detailed walkthrough, see the guide: How to Find a Song's BPM and Key.