BPM to ms and Hz Converter
Type a tempo, a beat length in milliseconds or a rate in Hz, and the other two follow. The table turns the tempo into LFO sync rates for every note value.
LFO sync rates
| Note | Length | Rate | Dotted | Triplet |
|---|---|---|---|---|
| Four bars | — | — | — | — |
| Two bars | — | — | — | — |
| Whole note (1 bar) | — | — | — | — |
| Half note | — | — | — | — |
| Quarter note | — | — | — | — |
| Eighth note | — | — | — | — |
| Sixteenth note | — | — | — | — |
| 32nd note | — | — | — | — |
The formulas
A beat lasts 60,000 ÷ BPM milliseconds, so 120 BPM is 500 ms. As a rate that’s BPM ÷ 60 beats per second: 120 BPM is 2 Hz. A note value is that many beats long — a whole note four, an eighth note half of one — and its rate is 1,000 ÷ its length in ms.
Syncing an LFO by hand
When a synth or plugin LFO only has a Hz knob, set it to the rate for the note value you want: at 120 BPM a quarter-note wobble is 2 Hz, an eighth note 4 Hz and a one-bar sweep 0.5 Hz. A free-running LFO drifts against the grid over time, so retrigger it on the downbeat if the instrument can.
Producer tools
- Delay & reverb time calculator — ms and Hz for every note value, plus reverb times
- Tempo change & pitch calculator — % speed, new BPM and semitones
- Running cadence → song BPM — music that matches your steps
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