Ohm's Law Calculator
Calculate voltage, current, or resistance (V = IR)
Select Parameter to Find
Choose which value you want to calculate
Ohm's Law Formula
V = I × R
V = I × R
Result
Calculated value for Voltage
V =
12
Volts (V)
Calculation:
V = I × R
V = 2 × 6
V = 12 V
Power (P)
24 W
P = V × I
Circuit Diagram
Voltage SourceResistorCurrent Flow
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About Ohm's Law Calculator
Calculate Voltage, Current, or Resistance
Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. This calculator helps you find any one of these values when you know the other two, and also calculates the power consumption.
Features
- Calculate voltage, current, or resistance
- Automatic power calculation (P = V × I)
- Visual circuit diagram
- Step-by-step calculation
- Formula display
- High precision results
- Input validation
- Example values included
- Real-time updates
- Clean, modern interface
Ohm's Law
V = I × R
• V = Voltage (Volts)
• I = Current (Amperes)
• R = Resistance (Ohms)
Formulas
Find Voltage:
V = I × R
Find Current:
I = V / R
Find Resistance:
R = V / I
Power Formula
Power (P): P = V × I = I²R = V²/R
Power is measured in Watts (W)
How to Use
- Select which parameter you want to find (V, I, or R)
- Enter the values for the two known parameters
- View the calculated result instantly
- Check the step-by-step calculation
- See the power consumption
- Examine the visual circuit diagram
Common Applications
- Electrical engineering calculations
- Circuit design and analysis
- Electronics troubleshooting
- Physics homework and labs
- DIY electronics projects
Units
Voltage: Volts (V)
Current: Amperes (A)
Resistance: Ohms (Ω)