Metronome 120 BPM

The exact timing grid at 120 BPM

The quarter-note interval comes from 60,000 milliseconds divided by 120 beats. Every other value below is derived from that 500-millisecond interval, so the table states its arithmetic rather than assigning a tempo name by feel.

A countable 120 BPM practice block

In 4/4, sixteen bars contain sixty-four quarter-note beats. At 120 BPM, those beats take thirty-two seconds: 64 × 500 milliseconds = 32,000 milliseconds. This gives you a fixed checkpoint that is longer than a single bar but short enough to repeat.

1. Leave the control at 120 BPM, choose 4/4, and keep quarter-note subdivision selected.
2. Start on the accented downbeat and play sixteen complete bars without restarting after a mistake.
3. Stop after beat four of bar sixteen. If your phrase finishes early or late, repeat while listening for the bar-one accent rather than raising the volume.

What changes when you select a subdivision?

The main beat remains two beats per second. Eighth notes create four clicks per second, triplets create six, and sixteenth notes create eight. These are click-event rates derived from the chosen subdivision; they are not new BPM readings.

If the extra clicks make the phrase feel faster, switch back to quarter notes and keep the tempo field at 120. If you need a broader reference, count every other quarter-note click as a calculated 60 BPM half-time layer while the metronome continues to schedule 120 quarter-note beats.

120 BPM metronome questions

How long is one beat at 120 BPM?

One quarter-note beat is 500 milliseconds because one minute contains 60,000 milliseconds and 60,000 ÷ 120 = 500.

Is 120 BPM the same as two beats per second?

Yes when BPM refers to quarter-note beats: 120 ÷ 60 = 2 beats per second.

Does choosing eighth notes make this a 240 BPM metronome?

No. The beat remains 120 BPM. Eighth-note subdivision adds one click halfway between consecutive quarter-note beats.

Why does audio begin only after I press Start?

Browsers commonly require a user action before starting an audio context. The button starts the local Web Audio clock used to schedule the clicks.

Timing boundary

The interval values and bar duration above are exact calculations from the selected tempo. They do not measure your instrument, certify device latency, or prove that a recording maintains 120 BPM. Use the tap readout to observe your own input intervals, and use the BPM Finder when you need a browser estimate from an audio file.

Scheduling reference: BaseAudioContext.currentTime.