Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's law (V = I * R)
Frequently Asked Questions
What is Ohm's law?
Ohm's law states that voltage equals current multiplied by resistance: V = I * R. It describes the relationship between voltage, current, and resistance in an electrical circuit.
How do I calculate power from voltage and current?
Power in watts equals voltage multiplied by current: P = V * I. You can also use P = I^2 * R or P = V^2 / R.
What are the units for voltage, current, and resistance?
Voltage is measured in volts (V), current in amperes (A), and resistance in ohms (Ω). Power is measured in watts (W).