📊
Ohm's Law Calculator - V = I × R
Free Ohm's Law calculator. Calculate voltage, current, or resistance. V = I × R for electrical circuits.
Ohm's Law Calculator
Calculate V, I, or R
Result
Enter your values to see results
and click the "Calculate" button
Ohm's Law Calculator
Ohm's Law describes the relationship between voltage, current, and resistance in electrical circuits. It's fundamental to electronics and electrical engineering.
Ohm's Law Formulas
V = I × R | I = V / R | R = V / I
V = Voltage (Volts), I = Current (Amperes), R = Resistance (Ohms). Power: P = V × I = I²R = V²/R
Frequently Asked Questions
What is Ohm's Law used for?
Designing circuits, calculating wire sizes, selecting components, troubleshooting electrical problems, and understanding power consumption.
What are typical household values?
US: 120V outlets. Europe: 230V. LED bulb: ~0.05A. Hair dryer: ~10A. Circuit breakers: 15-20A typical.
Related Calculators
Explore more calculators
100+ calculators for finance, health, math, and everyday life
All Calculators