Ohm's Law: Resistance
R = V / I
Instructions
Enter voltage in volts and current in amperes. The calculator outputs resistance in ohms.
Formula
R = V / I
Common Questions
Negative resistance?
Resistive components have R ≥ 0. Negative differential resistance can occur in specialized devices but is beyond basic Ohm's law.
What is the Ohm?
Calculate resistance from voltage and current: R = V/I. Free online calculator. Get instant results. Includes formulas and step-by-step solutions. Free forever. This calculator is designed for students, professionals, and anyone who needs fast, reliable results without manual computation. Simply enter your values above and get instant answers with step-by-step explanations.
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Manual calculations are time-consuming and error-prone, especially when dealing with complex conversions or formulas. This calculator eliminates guesswork by providing precise results every time you use it.
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