Single-Phase & Three-Phase Power Calculator
About the Single-Phase & Three-Phase Power Calculator
This calculator is designed for Electrical and Electronics Engineering (EEE) students, technicians, and professionals to quickly calculate electrical power in both single-phase and three-phase AC systems. Power calculation is a fundamental requirement in electrical design, load analysis, equipment selection, and energy auditing.
Single-phase systems are commonly used in residential and light commercial applications, whereas three-phase systems are widely used in industrial environments due to their higher power handling capability and efficiency.
Formulas Used
Single-Phase Power:
P = V × I × cosφ
Three-Phase Power:
P = √3 × V × I × cosφ
How to Use This Calculator
Select the appropriate tab based on your system type. Enter voltage, current, and power factor values. Click the calculate button to instantly obtain the real power in watts.
Example
Single-Phase:
V = 230 V, I = 5 A, cosφ = 0.8
Power = 230 × 5 × 0.8 = 920 W
Three-Phase:
V = 415 V, I = 10 A, cosφ = 0.9
Power = √3 × 415 × 10 × 0.9 ≈ 6471 W
Accurate power calculation helps prevent equipment overload, improves energy efficiency, and supports proper system planning. This calculator simplifies complex formulas and reduces manual calculation errors.
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