Inputs
Times are derived from the tempo: a 1/4 note is 60000 / BPM ms. Use straight values for tempo-synced delay, dotted (.) for the classic dotted-eighth sound, and triplet (3) for triplet feel. The same grid sets reverb pre-delay (a short note like 1/32–1/16) and tail length. The Hz column suits LFO or filter sync. Everything is computed in your browser — nothing is uploaded.
Delay / reverb times
Enter a tempo (BPM) greater than 0.
| Note | Straight (ms) | Dotted (ms) | Triplet (ms) | Hz |
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A calculator that turns a song's tempo (BPM) into delay and reverb times in milliseconds. Enter the BPM and it shows the 1/4-note delay time prominently, then lists straight, dotted and triplet delay times in ms for every note value from a whole note (1/1) down to a thirty-second note (1/32). The math is simple: a quarter note is 60000 / BPM ms, a dotted note is ×1.5, and a triplet is ×2/3. Use the straight column for tempo-synced delay, the dotted column for the classic dotted-eighth delay sound, and the triplet column for a triplet feel. The same grid also helps set reverb pre-delay (matched to a short note such as 1/32–1/16) and tail length. The Hz column converts each note's period to a frequency, useful for syncing an LFO, auto-filter or tremolo to the tempo. Great for mixing in a DAW, dialing in guitar pedals, or DJ work without reaching for a calculator. Everything is computed in your browser; the tempo you enter is never sent to any server or API.
How to use
- Enter the song's tempo (BPM).
- Read the 1/4-note delay time (ms) and the cheat sheet of straight, dotted and triplet times from whole note to 1/32.
- Pick the note row you need and set that ms on your delay or reverb (pre-delay/tail). Nothing is sent.
FAQ
Is the tempo I enter sent anywhere?
No. The delay times are computed entirely in your browser. The BPM you enter is never sent to any server or API — everything stays on your device.
What is the formula for delay time?
The base quarter-note delay is 60000 / BPM in milliseconds. A whole note is four times that, an eighth note is half, and so on by note denominator. A dotted note is the straight value × 1.5, and a triplet is × 2/3 (about 0.667). For example, at 120 BPM a quarter note is 500 ms and a dotted eighth is 375 ms.
What is a dotted-eighth delay?
It's a classic delay setting using the dotted-eighth-note time (famous in U2-style guitar). Set the delay to the ms in the dotted column of the 1/8 row and you get a rhythmic, spacious echo that bounces nicely against the tempo.
Can I use it for reverb pre-delay?
Yes. Setting the pre-delay (the gap before the reverb tail) to the ms of a short note like 1/32 or 1/16 keeps the reverb sitting in time. You can also use the ms values to gauge a tail length that resolves on the next beat or phrase.
What is the Hz column for?
It converts each note's period to a frequency (Hz = 1000 / ms). Use it when an effect sets its rate in Hz — such as an LFO, auto-filter or tremolo — so you can sync the modulation speed to the tempo.