Ohm's Law Calculator
Instructions
Enter any two values (voltage, current, or resistance) and click 'Calculate' to find the third value and power. The calculator uses Ohm's Law (V = IR) and the power equation (P = VI) to perform calculations.
Understanding Ohm's Law
Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.
Ohm's Law Formula: V = I * R
V = I * R
Power Calculation
In addition to Ohm's Law, this calculator also computes the electrical power (P) in the circuit. Power is the rate at which energy is transferred in an electrical circuit. It can be calculated using any of the following formulas:
- P = V * I
- P = I² * R
- P = V² / R