About AC Electrical Power Calculator (1-Phase & 3-Phase)
Professional alternating current (AC) power analysis for single-phase and three-phase industrial networks. Calculate real active power (kW), apparent power (kVA), reactive magnetizing power (kVAR), phase angles, and line currents.
Key Capabilities & Features
- Toggle between Single-Phase (1Φ) and Three-Phase (3Φ √3) power systems
- Calculates Real Power (P in kW), Apparent Power (S in kVA), and Reactive Power (Q in kVAR)
- Calculates phase angle θ (degrees) and power factor vectors
- Standard industrial voltage presets from 120V, 208V, 240V, 400V up to 480V/600V
- Instant interactive sliders for amperage and power factor variation
How to Use AC Electrical Power Calculator (1-Phase & 3-Phase)
Select Phase System
Choose Single-Phase (120V/240V) or Three-Phase (208V/480V).
Input Operating Voltage & Current
Select rated line-to-line voltage and specify operating current in Amperes.
Adjust Power Factor
Slide cos θ to evaluate real work capacity versus reactive inductive demand.
Privacy & In-Browser Execution Guarantee
100% private client-side execution. System voltages and load factors remain secure on your device.
Frequently Asked Questions
Why is √3 used in 3-phase power calculations?
In balanced three-phase systems, line voltages are 120° out of phase. The vector sum produces a line-to-line potential √3 (~1.732) times higher than line-to-neutral voltage.
What is the difference between kW and kVA?
kW (Real Power) is the actual electrical energy converted into work or heat. kVA (Apparent Power) is the total vector combination of real power and reactive power (kVAR) that conductors and transformers must carry.