Ohm's Law Resistance Calculator

Calculate electrical resistance (R) using voltage, current, or power.

Input Parameters

Calculation Mode

Voltage (V)

Current (I)

Calculation Results

Enter parameters to calculate resistance

About this calculator

Quick Reference

RResistance (Ohms)

VVoltage (Volts)

ICurrent (Amps)

PPower (Watts)

Overview

This calculator determines the resistance (measured in Ohms) of a component based on other circuit parameters.

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Pro Tips

Fun Facts

"The 'Ohm' is named after Georg Simon Ohm."
"Resistance depends on the material, length, cross-sectional area, and temperature of a conductor."
"Human skin resistance can vary from 1,000 Ohms (wet) to over 100,000 Ohms (dry)."

Formula: R = V / I