Enter the total speaker power (watts) and the total speaker resistance (ohms) into the calculator to determine the Speaker Voltage.

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## Speaker Voltage Formula

The following formula is used to calculate the Speaker Voltage.

V = SQRT ( P*R)

Variables:

- Where V is the Speaker Voltage (volts)
- P is the total speaker power (watts)
- R is the total speaker resistance (ohms)

To calculate a speaker voltage, multiply the speaker power by the speaker resistance, then take the square root of the result.

## How to Calculate Speaker Voltage?

The following two example problems outline how to calculate the Speaker Voltage.

**Example Problem #1:**

- First, determine the total speaker power (watts). In this example, the total speaker power (watts) is measured to be 50.
- Next, determine the total speaker resistance (ohms). For this problem, the total speaker resistance (ohms) is calculated to be 20.
- Finally, calculate the Speaker Voltage using the formula above:

V = SQRT ( P*R)

Inserting the values from above and solving the equation with the imputed values gives:

V = SQRT ( 50*20) = 10 (volts)

**Example Problem #2: **

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

total speaker power (watts) = 25

total speaker resistance (ohms) = 25

Entering these values into the formula or calculator above gives us::

V = SQRT ( 25*25) = 25 (volts)