Electrical Power Calculator
Calculate electrical power (watts), current (amps), voltage (volts), and resistance (ohms) using Ohm’s Law and power formulas. Perfect for DIY electrical projects and professionals.
Step 1: Basic Electrical Parameters
Ohm’s Law: V = I × R
Enter any two values to calculate the others. Power formula: P = V × I. All calculations use standard electrical formulas.
Step 2: System Details
Electrical Formulas
Power (W) = Voltage (V) × Current (A)
Voltage (V) = Current (A) × Resistance (Ω)
Current (A) = Voltage (V) ÷ Resistance (Ω)
Electrical Power Calculation Results
Electrical Power Output
Electrical Calculation Formulas
AC Power Formulas
For AC systems: Apparent Power (VA) = V × I
Real Power (W) = V × I × Power Factor
Three Phase Power = √3 × V × I × Power Factor
Energy Cost Analysis
Energy Cost Formula
Energy (kWh) = Power (kW) × Time (hours)
Cost = Energy × Electricity Rate ($/kWh)
Default rate: $0.12 per kWh (adjustable)
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