Enter any two known values of Voltage, Current, Resistance, or Power to dynamically calculate the remaining parameters. Real-time updates with standard unit conversion.
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Interactive Circuit Schematic
Mathematical Formulas
Enter any two values to solve the circuit equations.
View Ohm's Law Cheat Sheet
Voltage (V = I × R)
The electrical pressure that drives current through a conductor. Measured in Volts (V).
Current (I = V / R)
The rate of flow of electric charge through a conductor. Measured in Amperes (A).
Resistance (R = V / I)
The opposition that a substance offers to the flow of electric current. Measured in Ohms (Ω).
Power (P = V × I)
The rate at which electrical energy is consumed or dissipated. Measured in Watts (W).
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