Enter the total number of watts (watts) and the total current (amps) into the calculator to determine the Voltage from Watts. 

Voltage from Watts Formula

The following formula is used to calculate the Voltage from Watts. 

V = W / A


  • Where V is the Voltage from Watts (volts)
  • W is the total number of watts (watts) 
  • A is the total current (amps) 

How to Calculate Voltage from Watts?

The following two example problems outline the steps and information needed in order to calculate the Voltage from Watts.

Example Problem #1:

  1. First, determine the total  number of watts (watts). In this example, the total  number of watts (watts) is measured to be 31.
  2. Next, determine the total current (amps). For this problem, the total current (amps) is calculated to be 20.
  3. Finally, calculate the Voltage from Watts using the formula above: 

V = W / A

Inserting the values from above into the equation yields: 

V = 31 / 20 = 1.55 (volts)

Example Problem #2: 

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

total number of watts (watts) = 10

total current (amps) = 60

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

V = 10 / 60 = .166 (volts)