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Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law and Watt's Law. Includes LED resistor calculator.
Calculator
Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law and Watt's Law.
⚡ Calculate — Enter Any 2 Values
🔄 Formula Wheel
💡 LED Resistor Calculator
📋 Formulas Reference
| Find | Formula | Law |
|---|---|---|
| Voltage (V) | V = I × R | Ohm's Law |
| Voltage (V) | V = P / I | Watt's Law |
| Voltage (V) | V = √(P × R) | Derived |
| Current (I) | I = V / R | Ohm's Law |
| Current (I) | I = P / V | Watt's Law |
| Current (I) | I = √(P / R) | Derived |
| Resistance (R) | R = V / I | Ohm's Law |
| Resistance (R) | R = V² / P | Derived |
| Resistance (R) | R = P / I² | Derived |
| Power (P) | P = V × I | Watt's Law |
| Power (P) | P = I² × R | Derived |
| Power (P) | P = V² / R | Derived |