VA to kW Calculator
Convert apparent power (VA) to real power (kW) using power factor for AC electrical systems
PF
Conversion Results
Real Power (kW)
0.8 kW
800 Watts
Reactive Power
0.6 kVAR
Power Factor
0.80 (80%)
Phase Angle
36.87°
Energy per Hour
0.8 kWh
Formula
kW = (VA × Power Factor) ÷ 1000
Power Relationship
kW (0.8)
kVA (1.0)
kVAR (0.6)
Practical Examples
Electric Motor
Apparent Power: 7.5 kVA
Power Factor: 0.85
Real Power: 6.375 kW
UPS System
Real Power: 1.5 kW
Power Factor: 0.9
Apparent Power: 1.67 kVA
Industrial Transformer
Apparent Power: 250 kVA
Power Factor: 0.88
Real Power: 220 kW
Understanding Power Concepts
Key Formulas
VA to kW:
kW = (VA × PF) ÷ 1000
kW = (VA × PF) ÷ 1000
kW to VA:
VA = (kW × 1000) ÷ PF
VA = (kW × 1000) ÷ PF
kVA to kW:
kW = kVA × PF
kW = kVA × PF
Power Factor Importance
Power factor represents how effectively electrical power is being used. A low power factor means you're drawing more current than necessary to perform the same work, resulting in:
- Higher energy costs (utility penalties)
- Increased line losses and voltage drop
- Reduced system capacity
- Potential equipment overheating
Typical Power Factor Values
| Equipment | Power Factor | Efficiency Impact |
|---|---|---|
| Resistive Loads (Heaters) | 0.98-1.0 | Excellent |
| LED Lighting | 0.90-0.95 | Very Good |
| Motors (Full Load) | 0.85-0.90 | Good |
| Motors (Partial Load) | 0.70-0.80 | Fair |
| Old Fluorescent Lighting | 0.55-0.70 | Poor |