Electrical & Electronics
Ohm’s Law Calculator
Enter any two of voltage, current, resistance and power to calculate the remaining values.
CALCULATOR
Enter values
Enter exactly two values.
USAGE
How to use it
- Select units and enter two known quantities.
- Read all four normalized results together.
- Clear or replace inputs for another calculation.
FORMULA
Calculation
V = I × R; P = V × I = I²R = V²/RExample
12 V and 1 kΩ gives I = 12 mA and P = 144 mW
TECHNICAL
Technical notes
- Exactly two independent values are required.
- Rounding is applied only to displayed values.