Ohm's Law Calculator
Calculate voltage, current, and resistance
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How it works: Enter any two values (voltage, current, resistance) to calculate the third using Ohm's Law: V = I × R.
Tips
- V = I × R (Voltage = Current × Resistance)
- I = V ÷ R (Current = Voltage ÷ Resistance)
- R = V ÷ I (Resistance = Voltage ÷ Current)