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Electrical Resistance Calculator

Last updated: Monday, May 01, 2023
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Ohm's Law
Power & Current
Potential & Power

Electric resistance can be calculated using the relationship between electrical power and electric current. The formula for determining resistance is obtained by dividing the electric power by the square of the electric current. This relationship is known as Ohm's law and is fundamental in understanding the behavior of electrical circuits. Electric resistance is a measure of how much a material opposes the flow of electric current through it. It is an important concept in electrical engineering, as it plays a crucial role in designing and analyzing electrical circuits. By knowing the resistance of a component, engineers can calculate the power and current flowing through it and ensure that the circuit operates safely and efficiently.

An alternative formula for determining the resistance can be derived from:
\(P\) \(=\) \(I^2\) \(\cdot\) \(R\)
\(R\): the resistance
\(P\): the electric power
\(I\): the electric current
The SI unit of electric resistance is: \(ohm\text{ }(\Omega)\)

Find R

Use this calculator to determine the resistance when electric power and the electric current are given
the electric power
the electric current
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