Ohm's Law Calculator
Calculate voltage, current, resistance, or power
Ohm's Law Calculator
Enter your details below and get instant results
Ohm's Law Calculator
Use Ohm's Law to calculate any missing value. Enter any two of Voltage (V), Current (I), Resistance (R), or Power (P) to calculate the others.
How to Use
- Enter any two known values
- Leave the other two blank
- Click Calculate to find the missing values
Formula
V = IR | P = VI | P = I┬▓R | P = V┬▓/R
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