Enter the delay time in milliseconds and the beats per minute into the calculator to determine the delay time in seconds; this calculator can also evaluate any of the variables given the others are known.

Reverb Delay Formula

The following formula is used to calculate the delay time for a reverb effect:

DT = (60 * D) / (BPM * 1000)


  • DT is the delay time in seconds
  • D is the delay time in milliseconds
  • BPM is the beats per minute of the music

To calculate the delay time for a reverb effect, multiply the delay time in milliseconds by 60, then divide the result by the product of the beats per minute and 1000. This will give you the delay time in seconds.

What is a Reverb Delay?

A Reverb Delay is an audio effect that simulates the natural phenomenon of sound reflection in a physical space. It is a combination of two effects: reverb and delay. Reverb, short for reverberation, mimics the effect of a sound wave bouncing off various surfaces before it reaches the listener, creating a sense of space and depth. It can make a sound seem as if it’s being played in a large hall, a small room, or any other type of environment. Delay, on the other hand, is an effect that records an input signal and then plays it back after a period of time, creating an echo-like effect. When combined, these two effects can create a rich, complex sound that adds depth and dimension to the original audio. This effect is commonly used in music production, particularly in genres like rock and pop, to enhance the sound of instruments and vocals.

How to Calculate Reverb Delay?

The following steps outline how to calculate the Reverb Delay:

  1. First, determine the input signal ($). 
  2. Next, determine the decay time (seconds). 
  3. Next, gather the formula from above = RD = IS * DT.
  4. Finally, calculate the Reverb Delay.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

input signal ($) = 50

decay time (seconds) = 2.5