When you’d reach for this

The fastest way to answer “how fast is this song?” isn’t a waveform analyzer — it’s your finger. Tap the pad above in time with any music (a track, a bandmate, the rhythm in your head) and the counter converts your taps to BPM. It also answers the subtler question musicians ask mid-practice: am I actually holding this tempo?

How the reading works

Each tap timestamps itself against a high-resolution clock. The BPM shown is 60000 divided by the mean of your last eight tap intervals — enough smoothing that normal finger jitter washes out, without lagging behind a real tempo change. Intervals that land far from the median are dropped automatically, and a 2.5-second gap resets the count so a new measurement needs no button press.

Getting a trustworthy number

• Tap the pulse, not the ornament. Lock onto kick/snare or the conductor’s beat — tapping every sixteenth note quadruples the true BPM.
• Give it four beats to settle. Watch the reading stabilize rather than trusting the first pair of taps.
• Round for practice. If you measure 121.6, the useful number is 120 or 122 — send it to the metronome and nudge with the arrow keys until the click sits in the pocket.
• Check drift, not just tempo. Tap bar 1 and bar 16 of a recording separately; two different readings tell you the performance breathes (or rushes).

Three ambiguities worth knowing

A measured number can still mislead in three predictable ways. Double-time/half-time: the same song reads correctly at 90 or 180 depending on whether you tap the pulse or its subdivisions — if your result seems implausible, try halving or doubling it and see which sits better against the metronome click. Swing and shuffle: a swung eighth-note pulse isn’t evenly spaced, so tapping along to a jazzy ride pattern produces a lower, jittery reading; tap the beats (hi-hat foot, conductor’s hand) rather than the swung notes. Rubato and ritardandi: a passage that deliberately stretches time has no single BPM — the counter will show it wandering, which is honest data, not a tool failure: take the reading from the steady sections instead.

Frequently asked questions

How many taps do I need for an accurate BPM?

Two taps produce a reading, but treat it as a rough guess — a single interval carries all your timing error. Four to eight taps is the sweet spot: the counter averages your last eight intervals, and once three or more intervals exist it discards any that fall far from the median, so one clumsy tap won't skew the result.

Why did my BPM reset?

Deliberately. If more than 2.5 seconds pass between taps the counter assumes you're measuring a new song and starts a fresh count — that gap rule is what lets you tap song after song without touching a reset button.

Should I tap quarter notes or eighth notes?

Tap the main pulse — what you'd nod your head to. Tapping eighth notes doubles the reading (a song at 120 comes out 240), which is easy to spot and halve. When a track is ambiguous, try tapping the snare hits: in most pop and rock they land on beats 2 and 4.

Can I use this to check my own playing?

That's one of the best uses. Record yourself playing a passage 'in time', then tap along with the playback — if your measured BPM drifts up across the phrase, you're rushing. Do the same while sight-reading: most players speed up on easy bars and slow down on hard ones, and a tap readout makes the wobble visible.

What's the 'Use this tempo' link?

It opens the metronome with your measured BPM already loaded (/?bpm= gets set automatically), so you can immediately compare the click against whatever you were tapping to.