Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law
Quick examples:
Results
200.000 V
Voltage
2.000 A
Current
100.000 Ω
Resistance
400.000 W
Power
Ohm's Law Formulas
V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R
About Ohm's Law Calculator
Ohm's Law describes the relationship between voltage, current, and resistance in electrical circuits. This calculator also includes power calculations.
Key Concepts
- Voltage (V): Electrical potential difference measured in volts
- Current (I): Rate of electron flow measured in amperes
- Resistance (R): Opposition to current flow measured in ohms
- Power (P): Energy per unit time measured in watts
Tips
- Enter any two values to calculate the others
- Results automatically scale to appropriate units (mA, kΩ, etc.)
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