Electrical Calculators & Articles
Free online Electrical calculators and engineering guides for MEP professionals. Standard-based formulas, worked examples and practical site tips.
All Electrical Calculators
Standard-based tools with PDF results. Free to use, no signup.
Amps to kW calculator
Convert amps to kW or kW to amps for single phase, three phase and DC supplies, with kVA, kVAr, HP and a downloadable PDF result.
⚡ CalculateCable Size Calculator
Find the right copper or aluminium cable size from load, voltage drop and short-circuit limits, with a downloadable PDF result.
⚡ CalculateCapacitor Bank Calculator
Select an APFC capacitor bank by kW, power factor, voltage and detuned reactor, with step size, number of steps and a downloadable PDF result.
⚡ CalculatekW to kVA and kVA to kW Calculator
Convert kW to kVA or kVA to kW using power factor, and find the load current, reactive power and power factor angle for single phase and three phase systems.
⚡ CalculateVoltage Drop Calculator
Calculate voltage drop in volts and percent for single phase, three phase and DC cables, with cable power loss and the minimum cable size for your limit.
⚡ CalculateAll Electrical Articles
Guides, tutorials and design basics from site to office.