Ohm's Law Current Calculator

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

Input Parameters

Calculation Mode

Voltage (V)

Resistance (R)

Calculation Results

Enter parameters to calculate current

Quick Reference

ICurrent (Amps)

VVoltage (Volts)

RResistance (Ohms)

PPower (Watts)

Overview

This calculator specifically determines the electrical current (measured in Amperes) flowing through a circuit based on the other known parameters.

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Pro Tips

I = V / R (Current = Voltage / Resistance)
I = P / V (Current = Power / Voltage)
I = √(P / R) (Current = Square root of Power / Resistance)

Fun Facts

"A current of just 0.1 to 0.2 Amps can be fatal to a human being if it passes through the heart."
"The 'Ampere' is named after André-Marie Ampère, one of the main discoverers of electromagnetism."
"Current is essentially the rate of flow of electric charge."

Formula: I = V / R

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