Enter the total resistance of the resistor (ohms) and the total current running across the resistor (amps) into the calculator to determine the Resistor Voltage. 

Resistor Voltage Formula

The following formula is used to calculate the Resistor Voltage. 

RV = TR * TI 

Variables:

  • Where RV is the Resistor Voltage (Volts)
  • TR is the total resistance of the resistor (ohms) 
  • TI is the total current running across the resistor (amps) 

To calculate the resistor voltage, multiply the resistance by the current running across the resistor.

How to Calculate Resistor Voltage?

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

Example Problem #1:

  1. First, determine the total resistance of the resistor (ohms). In this example, the total resistance of the resistor (ohms) is measured to be 15.
  2. Next, determine the total current running across the resistor (amps). For this problem, the total current running across the resistor (amps) is calculated to be 3.
  3. Finally, calculate the Resistor Voltage using the formula above: 

RV = TR * TI 

Inserting the values from above into the equation yields: 

RV = 15* 3  = 45 (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 resistance of the resistor (ohms) = 16

total current running across the resistor (amps) = 4

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

RV = 16 * 4  = 64 (Volts)