Engineering Calculation Tools
Streamline your technical calculations. Free engineering calculation tools designed for electrical power, electronic circuits, and mechanical systems.
Electrical Unit Converter
Convert power, voltage, current, resistance, frequency and energy — instantly, with engineering precision.
Power Factor Correction Calculator
Determine the required capacitor bank sizing (kVAR and µF) to improve your system power factor and reduce line current.
3-Phase Power & Current Calculator
Calculate full-load line current, real power (kW), apparent power (kVA), and reactive power (kVAR) for balanced three-phase systems.
Busbar Current Carrying Capacity Calculator
Calculate rated continuous ampacity, total cross-sectional area, and weight for Copper and Aluminum busbars across single and multi-run configurations.
Voltage Drop & Cable Sizing Calculator
Calculate cable voltage drop, load-end voltage, line power loss, and find the minimum recommended cable size for AC and DC circuits.
Transformer Sizing & Fault Current Calculator
Calculate rated transformer kVA, full load currents (primary & secondary), prospective short-circuit fault current (kA), and fault level.