Power Factor Calculator & Capacitor Bank Sizing
Calculate power factor and capacitor bank requirements for power factor correction.
Use this power factor calculator to determine reactive power (kVAR), apparent power, and capacitor bank size required to improve power factor in electrical systems.
Power Parameters
System Load
Power Factor (PF)
Required Correction
Capacitor Bank
Reactive Power Needed (Qc)
42.1
kVAR
Required capacitor size to reach target PF
System Benefits
Power Triangle
Freed Capacity
19.7
kVA
Apparent power capacity released
Current Apparent Power
125.0
kVA
Total system burden before correction
Engineering Reference
Capacitor Sizing Formula
Qc = P × (tan(θ₁) - tan(θ₂))
Power Triangle
S = P / PF
- P = Real Power (kW)
- S = Apparent Power (kVA)
- Qc = Capacitor Required (kVAR)
- θ = arccos(PF)