Tap BPM: tap along to find the tempo
Tap the big pad in time with a song, click, or press a key. From the second tap you see the BPM; the longer you tap, the more accurate it gets.
How it is calculated
How to find the tempo
- Play the music and listen for the main beat.
- Tap the pad, click or press a key in time – at least 8 to 10 times.
- The big number is the tempo in BPM (beats per minute). “Last 4 beats” reacts faster when the tempo changes.
- For a new song press “Start over” or wait 2.5 seconds.
How it is calculated
BPM = 60,000 ÷ average interval between taps in milliseconds (so 500 ms gives 120 BPM). The average uses the time between the first and last tap, so a single misplaced tap hardly matters. The variation is the standard deviation of the intervals (sample, as in the NIST/SEMATECH e-Handbook) relative to the average. Below 2 % your tapping counts as very steady here, below 5 % as steady – a threshold chosen by this tool.
Half or double tempo?
If you tap only every second beat you measure half the tempo; if you tap eighth notes, double. That is why the tool shows both variants – your ear decides which is right.
Limits
The result is only as accurate as your tapping. Screens, touchscreens and keyboards add small delays, but they are similar for every tap and barely affect the intervals.
Frequently asked questions
How many times should I tap?
You get a value from the second tap; it becomes reliable after about 8 to 10 taps. The variation shows how steady your tapping is.
Why does it show half and double tempo?
Because it is easy to tap only every second beat or every eighth note. The variants help you find the tempo that is actually meant.
Can I tap with the keyboard?
Yes, with any letter or number key, Space or Enter. Esc starts a new measurement.
How accurate is the result?
As accurate as your tapping. The more taps and the lower the variation shown, the more reliable the value.
Is anything stored?
No. The measurement only exists while the page is open and is not sent anywhere.
Sources and legal basis
- NIST/SEMATECH e-Handbook of Statistical Methods – 1.3.5.6 Measures of Scale (standard deviation)
- MDN Web Docs – Performance.now()
- MDN Web Docs – pointerdown event
As of:
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