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Ohm's Law Calculator
Calculate Electrical Values
A
Ω
W
How to Use
Ohm's Law & Power Calculations
This calculator uses Ohm's Law and Power formulas to find electrical circuit values.
Basic Formulas
- Ohm's Law: V = I × R
- Power: P = V × I
- Power (alternative): P = I² × R
- Power (alternative): P = V² / R
How It Works
- Choose what to calculate: Voltage, Current, Resistance, or Power
- Enter two known values: Fill in any two of the remaining fields
- Calculate: Get the unknown value with step-by-step solution
- View all values: See the complete circuit analysis
Units
- V: Voltage in Volts
- I: Current in Amperes (A)
- R: Resistance in Ohms (Ω)
- P: Power in Watts (W)
Applications
- Electrical circuit analysis
- Component sizing and selection
- Power consumption calculations
- Electronic circuit design
- Troubleshooting electrical issues
Try Sample Calculation
Click "Load Sample" to see typical calculations for the selected type.
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