Ohm's Law Power Calculator

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

Input Parameters

Calculation Mode

Voltage (V)

Current (I)

Calculation Results

Enter parameters to calculate power

About this calculator

Quick Reference

PPower (Watts)

VVoltage (Volts)

ICurrent (Amps)

RResistance (Ohms)

Overview

This calculator determines the electrical power (measured in Watts) consumed or produced in a circuit.

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Pro Tips

Fun Facts

"Power is the rate at which work is done or energy is transformed."
"1 Horsepower (HP) is approximately equal to 746 Watts."
"LED bulbs use much less power (Watts) than incandescent bulbs to produce the same amount of light (Lumens)."

Formula: P = V × I