AC Power Calculator
Calculate single-phase and three-phase real, apparent, and reactive power in AC electrical systems
Calculator
Enter voltage, current, power factor, and select single-phase or three-phase to analyze your AC circuit.
About the AC Power Calculator
The AC Power Calculator helps you quickly determine key electrical power parameters for single-phase and three-phase AC circuits. It calculates real power (kW), apparent power (kVA), and reactive power (kVAR) based on voltage, current, and power factor. This tool is ideal for electrical engineers, students, and technicians working on AC power systems.
What You Can Calculate
- Real Power (P): Measured in kilowatts (kW), represents the actual usable power consumed by a load.
- Reactive Power (Q): Measured in kilovolt-amperes reactive (kVAR), represents the energy stored and released by inductive or capacitive components.
- Apparent Power (S): Measured in kilovolt-amperes (kVA), combines both real and reactive power components.
- Power Factor (PF): The ratio of real power to apparent power, indicating the efficiency of power usage.
Formulas Used in the Calculator
The calculator uses standard electrical engineering equations for both single-phase and three-phase AC systems:
- Single-Phase Apparent Power: S = V × I
- Three-Phase Apparent Power: S = √3 × V × I
- Real Power: P = S × PF
- Reactive Power: Q = √(S² − P²)
How to Use the Calculator
- Select whether your circuit is single-phase or three-phase.
- Enter the voltage, current, and power factor values.
- The calculator instantly displays real, reactive, and apparent power results.
Applications of AC Power Calculation
Understanding AC power relationships is crucial for electrical design, load analysis, and energy efficiency optimization. Engineers use these calculations to size transformers, generators, and electrical distribution systems, while minimizing losses and ensuring proper power factor correction.