# Reverb Calculator

Enter the tempo and the calculator lists how long every note value lasts, straight, dotted and as a triplet. Choose a pre-delay and a decay, read the total in milliseconds, and copy the number into your reverb.

> Canonical: https://aimusicis.com/reverb-calculator

## A reverb calculator that works from your tempo

A reverb time is a musical length, not a number pulled from a preset. Set the tempo once and the calculator turns every note value into milliseconds, so a pre-delay or a decay can be chosen by ear and written down exactly.

### Every note length in milliseconds

At one tempo the calculator lists a whole note down to a 1/128, so a reverb time can be set to a musical value instead of a round number.

### Straight, dotted and triplet readings

Each note value is shown three ways, so a dotted delay or a triplet tail is read off the table rather than worked out by hand.

### Pre-delay, decay and their total

Pick the two note values you want and the calculator adds them up, which is the figure to enter as a total reverb time.

## Set a reverb time in three steps

### Enter the tempo

Type the tempo of the track, and every note value on the page is recalculated at that tempo.

### Choose a pre-delay and a decay

Pick a note value for each one. Short values keep the reverb clear of the words; longer values let the tail bloom.

### Copy the number you need

Read the pre-delay, the decay and the sum in milliseconds, and copy whichever one your reverb asks for.

## Tempo, note values and milliseconds

### 30 to 300 BPM

The tempo range the calculator accepts, stepped one beat per minute at a time.

### 8 note values

From a whole note down to a 1/128, each one listed at the tempo you set.

### 3 readings per note value

Every note value is shown straight, dotted and as a triplet, so no reading has to be estimated.

### 1 decimal place

Times are given to a tenth of a millisecond, which is finer than any reverb field accepts.

## Who reaches for a reverb calculator

### Mixers setting a reverb time

Work out a pre-delay and a decay that sit inside the tempo of the track instead of guessing at the numbers.

### Producers matching a delay to the beat

A delay that follows a note value stays in time with the music, and the table gives that value for every note length at your tempo.

### Students learning what note values are worth

Read a dotted note or a triplet in milliseconds to see how the note values relate to one another at a single tempo.

## Tools related to Reverb Calculator

### [Key & BPM Finder](https://aimusicis.com/key-bpm-finder)

### [Frequency Generator](https://aimusicis.com/frequency-generator)

### [Random Key Generator](https://aimusicis.com/random-key-generator)

### [Audio Spectrum Analyzer](https://aimusicis.com/audio-spectrum-analyzer)

## Reverb Calculator FAQ

### How does the reverb calculator work out the times?

The reverb calculator treats one quarter note as 60000 divided by the tempo in BPM, and every other note value as that quarter note multiplied by four over its denominator.

### Which note values does the reverb calculator cover?

The reverb calculator covers a whole note down to a 1/128, and shows each value straight, dotted and as a triplet at the tempo you enter.

### How do I choose a pre-delay?

A pre-delay is the gap before the reverb starts. A short value such as a 1/32 keeps the reverb behind the words, while a longer one lets the voice and the space separate.

### How do I choose a decay time?

A decay is how long the reverb tail lasts. A long value such as a 1/2 or a 1/1 gives a hall-like tail, and a short one keeps the space tight around the part.

### Why do the times change when I change the tempo?

Every note value is a fraction of a beat, so the length in milliseconds follows the tempo. A 1/4 note is 500 ms at 120 BPM and 300 ms at 200 BPM.

### What are the limits of a reverb time in milliseconds?

The reverb calculator computes the times and does nothing else. It never auditions a reverb or an audio file, and a value that lines up with the tempo can still sound wrong in a dense mix, so treat the number as a starting point and set the final time by ear.

### Can I use the same table for a delay?

The same table serves a delay. A dotted 1/8 or a triplet 1/4 is a common delay time, and the milliseconds column is what the delay's time field wants.

### Does the reverb calculator need an account?

The reverb calculator runs in the browser with no sign-in, no credits and no upload, and it keeps no history of the tempos you enter.

### How many credits does Reverb Calculator use?

Reverb Calculator runs in the browser and draws zero credits.

## Put these times into a mix

Take the pre-delay and decay you settled on into the editor, or slow a track down and hear the space change.

_Last updated August 28, 2026_