Electrical Engineering
Calculators
9 free sizing, conversion, and analysis tools for transformer specification, protection coordination, harmonic mitigation, and energy economics — built for engineers and procurement teams.
Fundamental tools for transformer and load sizing.
Transformer kVA Calculator
Solve for kVA, Volts, or Amps. Single-phase and three-phase with √3 multiplier.
kW to kVA Converter
Convert between real power (kW), apparent power (kVA), and power factor.
HP to kVA Calculator
Convert motor horsepower to transformer kVA accounting for motor efficiency and power factor.
Fault current analysis and harmonic distortion tools.
Fault Current Calculator
Calculate available short-circuit current at the transformer secondary from kVA, voltage, and %Z.
Harmonic Calculator
Compute THD and K-factor from individual harmonic currents. Determine the correct K-rated transformer.
Harmonic Reactor Calculator
Size a line reactor for a VFD or non-linear load. Outputs inductance in mH and estimated THD reduction.
Transformer efficiency, savings analysis, and impedance tools.
Efficiency Calculator
Calculate transformer efficiency at any load level and all-day efficiency based on no-load and copper losses.
Savings & Payback Calculator
Compare two transformers by annual energy losses, cost savings, CO₂ reduction, and simple payback period.
Inductance Calculator
Calculate transformer leakage reactance and inductance from kVA, voltage, and %Z. Includes short-circuit current.
Talk to a Candron Engineer
Our engineering team can review your specifications, confirm sizing, and provide same-day quotes on stock and custom-built transformers.