Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law. Essential for electronics hobbyists, electrical engineers, and anyone working with circuits.
Ohm's Law Formulas
V = I × R
Voltage = Current × Resistance
I = V ÷ R
Current = Voltage ÷ Resistance
R = V ÷ I
Resistance = Voltage ÷ Current
P = V × I
Power = Voltage × Current
How to Use This Calculator
- Select what you want to calculate (voltage, current, resistance, or power)
- Enter the two known values
- Click "Calculate" to get the missing value
- Use this for circuit design, troubleshooting, and electrical projects