Ohm's Law Calculator
Enter any two values to calculate the other two. Supports voltage, current, resistance, and power.
Result
Voltage: -
Current: -
Resistance: -
Power: -
Ohm's Law Tips
Formulas
V = I × R, I = V / R, R = V / I, P = V × I = I² × R = V² / R
How to Use
Enter any two values, leave the others blank. The calculator will solve for the missing values.
Examples
V=12V, R=6Ω → I=2A, P=24W.