Enter the voltage and current into the calculator to determine the resistance of a motor. This calculator uses Ohm’s Law to evaluate the resistance.

## Motor Resistance Formula

The following formula is used to calculate the resistance of a motor:

R = V / I

Variables:

- R is the resistance of the motor (Ohms, Ω)
- V is the voltage across the motor (Volts, V)
- I is the current flowing through the motor (Amperes, A)

To calculate the resistance of a motor, divide the voltage across the motor by the current flowing through it.

## What is Motor Resistance?

Motor resistance is the opposition that the motor presents to the flow of electric current. It is a crucial parameter that affects the performance and efficiency of the motor. A higher resistance generally means that the motor will draw less current for a given voltage, which can lead to reduced performance but potentially increased efficiency. Conversely, a lower resistance allows more current to flow, which can increase performance but may lead to higher energy consumption and heat generation.

## How to Calculate Motor Resistance?

The following steps outline how to calculate the Motor Resistance.

- First, measure the voltage across the motor (V) in volts.
- Next, measure the current flowing through the motor (I) in amperes.
- Use the formula from above: R = V / I.
- Finally, calculate the Motor Resistance (R) in ohms.
- 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.

Voltage across the motor (V) = 24 volts

Current flowing through the motor (I) = 2 amperes