Privacy Ohm's Law Calculator
Enter Values (at least 2)
V
A
Ω
W
Results
Voltage
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Current
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Resistance
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Power
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Formulas
V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R
About Ohm's Law Calculator
This calculator helps you solve electrical circuit problems using Ohm's Law and the power equation. Simply enter any two known values (voltage, current, resistance, or power) and the calculator will determine the remaining values. All calculations are performed in your browser - no data is sent to any server.
Understanding Ohm's Law:
- Ohm's Law (V = I × R): States that voltage equals current multiplied by resistance. This fundamental relationship describes how electrical current flows through a conductor.
- Power Equation (P = V × I): Electrical power in watts equals voltage multiplied by current. This tells you how much energy is being used per second.
- Derived Formulas: P = I²R and P = V²/R are derived by combining Ohm's Law with the power equation, useful when you know different combinations of values.
- SI Units: Voltage in Volts (V), Current in Amperes (A), Resistance in Ohms (Ω), Power in Watts (W).
🔒 Privacy-Friendly: All calculations are performed entirely in your browser. No data is sent to any server.
⚠️ Disclaimer: This calculator is for educational and reference purposes only. Always verify calculations and follow proper safety procedures when working with electrical circuits.
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