Calculate Voltage, Current, Resistance, or Power.
Please enter at least two values.
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Formulas: V=IR, P=VI.
Enter any two known values (e.g., Voltage and Resistance) and click Calculate to find the other two values (Current and Power).
Calculations are mathematically precise based on the fundamental laws of electricity.