How to tap a tempo
- Start the music — a record, a rehearsal, a video, the riff in your head. Anything with a pulse you can feel.
- Tap the quarter note, not every note you hear. Tap what you would count, or what your foot does. Tapping eighths gives you exactly double the tempo, which is a common way to end up at 160 for a song at 80.
- Keep going past the fourth tap. The reading uses a rolling window of your last 5 taps, so it settles as you tap and keeps following you afterwards.
- Take the number. Open the metronome at that tempo and play against it, or write it down for the session.
Why the reading is a median, not an average
Every tap tempo tool has to decide what to do with a bad tap, and almost all of them average. Averaging is the wrong answer, because a mean is pulled by its worst value. Tap a steady 120 BPM and let one tap land half a beat late: the intervals are 500, 500, 900 and 500 ms, the mean is 600 ms, and the tool tells you 100 BPM. You were never anywhere near 100.
The median takes the middle of those intervals instead. The late tap is still in the list — it is simply on the outside of it, where it belongs — and the reading stays at or near 120. That is the whole difference, and it is why this tapper feels steady while you are still finding the beat. The spread figure is the honest half of the bargain: it shows how far apart your widest and narrowest intervals were, so a reading taken from ragged tapping cannot pretend to be a clean one.
What people use a BPM tapper for
- Learning a song. Tap the record, then practise the part at that tempo — or slower, and climb to it with the metronome’s speed trainer.
- Setting a delay or a tremolo. Tap the tempo and read the beat length in milliseconds beside it: that number is the delay time for a quarter-note repeat, half it for eighths, and multiply by 0.75 for the dotted-eighth sound.
- Beatmatching and setting a project tempo. A tap for BPM is faster than a waveform when all you need is the ballpark to start from.
- Naming a tempo. The marking under the number is the Italian word a score would use for that speed — tap out something brisk and find that it is Allegro.
- Checking your own time.Tap what feels like 120 with nothing playing, then look. Most people are 10 BPM out, and the spread figure will tell you whether you were even steady about it.
Tempo tapper, BPM tap, tap for BPM
They are all the same tool, and it started as hardware: the tap tempo footswitch on a delay pedal, the tap button on a drum machine, the one on a digital piano. The idea is older than any of them — you already know the speed in your hands, and tapping is simply the shortest route from knowing it to writing it down. This page is that button with a readout attached and the working shown.
From a number to a click
A tapped tempo is a starting point, not a practice session. When you have the number, the full online metronome takes it straight from the button above and adds everything the tapper deliberately does not have: time signatures including odd meters, subdivisions, per-beat accents, a speed trainer, a gap trainer and drift-free timing you can record to. If it is the word you are after rather than the number, the tempo marking pages give the BPM range behind Allegro, Andante, Largo and the rest, each with the metronome already set to it.
And before any of it: a metronome fixes when you play a note, never whether the note was right. If the instrument has drifted, the free chromatic tuner takes about fifteen seconds.
Frequently asked questions
How many times should I tap?
Four or five. Two taps already give you a number, but it is the number for one interval and it will move; by the fifth tap the reading has settled and the window is full. After that it keeps following you — the oldest tap drops out as each new one arrives, so you can speed up mid-set and the reading comes with you instead of averaging where you started.
Why does the BPM barely move when I fumble a tap?
Because the reading is the median of your recent intervals, not their average. A mean is dragged by its worst value: one tap half a beat late in a set at 120 BPM pulls a mean down to about 100. The median puts the same tap on the outside of the list where it changes almost nothing, which is what you want, because a missed tap is the normal case rather than the exception.
What is a BPM tapper for?
Finding the tempo of music that did not come with a number. DJs beatmatch with it, producers set a project tempo to a reference track, guitarists dial in a delay pedal by ear, and anyone learning a song by ear taps the record to find the tempo to practise it at. It is also the fastest way to set a metronome: you know the speed you want in your hands long before you can name it in numbers.
How accurate is tapping?
Within a couple of BPM if you tap evenly, which is close enough for practice, for a delay time and for beatmatching. It cannot be more accurate than your own timing — the tool is measuring you, not the music. The spread figure tells you how even your taps were: under about 15 ms and the reading is as good as tapping gets, and if it is wide, tap again rather than trusting the number.
Does it use the microphone?
No. Nothing on this page listens, records or makes sound. It measures the times of your own taps and does the arithmetic in your browser, which is why it works with headphones in, in a rehearsal room, or with the music playing from across the room.
Can I tap with the keyboard?
Yes — the space bar taps, anywhere on the page. That is usually the steadier hand: a key has a shorter, more consistent travel than a mouse click, and it leaves your other hand free. Every tap is registered on the way down rather than on release, because the down edge is where you meant the beat to be.
What happens if I stop tapping?
After 2.5 seconds the group ends and the readout dims. The next tap starts a fresh count rather than being measured against a tap from before you walked away — otherwise a coffee break would read as about one beat per minute.