Press Start for a 100 BPM click. Quarter-note beats are 600 milliseconds apart. The control starts at 100 and remains adjustable for slower drills or faster repetitions.
BPM
Expose every gap
Tap against the 600 ms pulse
At 100 BPM, a centered pair of taps should be about 600 milliseconds apart. The recent-interval row keeps each gap visible alongside the running BPM average.
Current tap BPM—
Average tap BPM—
Recent tap intervals
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The 100 BPM interval grid
The base interval is 60,000 milliseconds divided by 100 beats, which equals 600 milliseconds. Every other row below comes from multiplying or dividing that base interval; selecting one of them does not rename the underlying tempo.
From the first quarter-note click to the sixth is five intervals: 5 × 600 ms = 3 seconds. Eighth-note clicks fall at each 300 ms midpoint.
Click value
Interval
Calculation from 100 BPM
Half note
1,200 ms
600 × 2
Dotted quarter
900 ms
600 × 1.5
Quarter note
600 ms
60,000 ÷ 100
Eighth note
300 ms
600 ÷ 2
Eighth-note triplet
200 ms
600 ÷ 3
Sixteenth note
150 ms
600 ÷ 4
A five-bar timing audit
In 4/4, five complete bars contain twenty quarter-note beats. Count from the first beat to the next hypothetical beat after bar five and you span twenty intervals: 20 × 600 milliseconds = 12,000 milliseconds, or twelve seconds. This endpoint avoids treating the first click as elapsed time.
Choose 4/4 with quarter-note subdivision and start on an accented downbeat.
Count five complete bars, then listen for where the next bar-one click would land.
Use a wall clock only as a rough check. Speaker and device latency can move the sound you hear even though the browser schedules the click against its audio clock.
Clicks per second without changing the tempo
The 100 BPM quarter-note pulse produces 100 ÷ 60, or about 1.667 beat events per second. Eighth-note subdivision doubles the audible event rate to about 3.333 clicks per second. Triplets create exactly five clicks per second, and sixteenth notes create about 6.667. These rates describe scheduled click events inside the same 100 BPM beat.
If the six-hundred-millisecond gaps feel too open, add eighth notes for a three-hundred-millisecond guide. Remove the subdivision when the phrase is stable while leaving the tempo field at 100.
100 BPM metronome questions
How long is one beat at 100 BPM?
One quarter-note beat lasts 600 milliseconds because 60,000 milliseconds ÷ 100 beats = 600.
How many seconds are four beats at 100 BPM?
Four beat intervals take 2.4 seconds: 4 × 600 milliseconds = 2,400 milliseconds.
Do eighth notes make the tempo 200 BPM?
No. They add a midpoint click every 300 milliseconds while the quarter-note pulse remains 100 BPM.
Why does sound begin only after pressing Start?
Browsers normally require a user action before starting or resuming an audio context. The Start button activates the local clock that schedules the clicks.
Timing boundary
The interval, event-rate and bar-duration values above are transparent calculations from a selected 100 BPM value. They do not measure a musical performance, certify speaker latency, or show that an audio recording remains at 100 BPM. Use the tap panel for your own input gaps and the BPM Finder for a browser estimate from a selected audio file.