How to find a song's BPM by tapping
Play the song or rhythm you want to measure. Identify the steady beat you would naturally clap to, then tap the large pad once for each beat. On a keyboard you can use Space while the tool is visible and you are not typing or using another control. After two taps the display estimates BPM. Continue for four to eight steady beats to make the result more useful, and press Reset before measuring another song.
The tool does not identify songs, record audio, request microphone access or upload anything. It only records the time between your own taps inside your browser. A pause longer than three seconds begins a new sample. Very fast accidental double taps are ignored, and only the most recent eight intervals contribute to the reading.
How the BPM formula works
BPM stands for beats per minute. A beat every 500 milliseconds gives 60,000 ÷ 500 = 120 BPM. The counter measures successive time gaps, filters intervals far from the median and averages the remaining recent intervals. It is an estimate of your tapping, not a scientific measurement of the song's actual tempo. If your taps are uneven, the variation indicator increases. A human finger is not perfectly regular, so let the display settle before recording the number.
Worked examples and half-time
Tap at 0, 500, 1,000, 1,500 and 2,000 milliseconds: each interval is 500 ms, so the result is 120 BPM. Tap every 750 ms and the reading is 80 BPM. A song counted at 80 BPM may also be felt at 160 BPM, depending on whether you tap every beat or every other beat. The half-time and double-time figures are alternative musical interpretations, not errors in arithmetic.
Delay time and note duration
Music producers often set echo and delay effects from tempo. At 120 BPM a quarter note lasts 500 ms, an eighth note lasts 250 ms, a dotted eighth lasts 375 ms and an eighth-note triplet lasts about 166.7 ms. These figures change automatically with your tapping. The dotted eighth is three quarters of the quarter-note duration; the triplet eighth is one third of a half note. Check which subdivision matches the rhythm you want before applying a delay setting.
Tips for a stable reading
Follow a clear kick drum, snare or metronome click rather than an irregular fill. If a live band speeds up or slows down, expect the reading to move. Tap the same rhythmic subdivision throughout the sample. When a track changes, pause or Reset. The variation indicator describes the spread of accepted tap intervals, not a calibrated confidence score. Compare the estimate with the metronome and listen for drift. The stopwatch measures elapsed time rather than beat frequency.
Frequently asked questions
How many taps do I need?
Two taps give a first estimate. Four to eight regular taps are usually more useful.
Why does the BPM seem half or double?
You may be tapping every other beat or a subdivision. Compare the half-time and double-time readings.
Does it listen to my music?
No. Only the times of your clicks or keypresses are measured locally in the browser.
How do I convert BPM to milliseconds?
Divide 60,000 by BPM for one quarter note. At 120 BPM that is 500 milliseconds.
Can I use the space bar?
Yes when the tool is visible and you are not typing or using another control. It does not intercept Space while you read below the tool.
Last updated: October 17, 2026