Kulture Lab / Free music tools
BPM to Milliseconds: Delay & Reverb Calculator
Enter your BPM. Get timing values for delay and reverb.
Not sure? Tap the beat to find your BPM.
| Note length | Delay time |
|---|
Reverb starting point
A creative starting point. A reverb tail fades; this is not a precise cutoff or a room measurement.
| Pre-delay | 31.25 ms |
|---|---|
| Decay | 1,968.75 ms |
These straight-note suggestions stay the same when you switch delay timing. Adjust by ear for your track.
Free to use. No account needed. Works in your browser.
Convert BPM to milliseconds
This delay calculator turns your song’s tempo into note lengths you can enter into a delay plugin. It is useful when an effect has no tempo-sync control or when you want to understand exactly how long a rhythmic echo lasts. You can switch between straight, dotted and triplet timing.
How to use the delay & reverb
- Enter the song tempo from your DAW or the BPM tapper.
- Choose straight, dotted or triplet notes.
- Tap a timing value to copy its number in milliseconds, then paste it into your effect. Seconds are shown too.
Example: delay times at 120 BPM
A straight quarter note lasts 500 ms at 120 BPM. An eighth note lasts 250 ms and a sixteenth lasts 125 ms. A dotted eighth lasts 375 ms. An eighth-note triplet lasts approximately 166.67 ms. Try different settings against the groove and reduce feedback if the echoes crowd the next phrase.
How does the calculation work?
One quarter-note beat lasts 60,000 divided by BPM milliseconds. Longer and shorter note values are multiples of that beat. A dotted note multiplies its straight value by 1.5; a triplet multiplies it by two thirds.
What are the reverb settings?
The optional reverb section lets you choose a total of 1, 2, 4 or 8 quarter-note beats, with a short pre-delay of one sixty-fourth note. The default is four beats (one bar in 4/4). Decay fills the remaining time. At 120 BPM, that gives 31.25 ms of pre-delay and 1,968.75 ms of decay. These are creative starting points, not a measurement of a room’s acoustic reverberation. Plugin decay controls and the sound being processed can behave differently.