Electrical Tools Wave 1
These tools are built for general reference and calculation support. They are not a substitute for professional electrical design, inspection, testing or certification.
Interactive Ohm’s Law WheelCalculate voltage, current, resistance and power from any two known values.
Watts Volts Amps CalculatorConvert between watts, volts and amps for DC, single-phase and three-phase loads.
Power Triangle CalculatorCalculate kW, kVA, kVAr and power factor relationships.
Voltage Drop CalculatorEstimate AC voltage drop using cable size, length, current and conductor material.
DC Voltage Drop CalculatorEstimate DC voltage drop for battery, solar, vehicle and low-voltage circuits.
Fuse Rating CalculatorEstimate a fuse rating from load current and design margin.
MCB Sizing Guide CalculatorEstimate load current and compare it against common MCB ratings.
Cable Capacity Reference ToolReference approximate current capacities for common copper conductor sizes.
Power Consumption CalculatorCalculate energy use and running cost from watts, hours and electricity tariff.
Battery Runtime CalculatorEstimate battery runtime from battery capacity, voltage, load and usable capacity.
3-Phase CalculatorCalculate three-phase current, power, voltage and apparent power estimates.
Competent persons only: Electrical calculations can affect safety. Always check results against the regulations in force, manufacturer data, cable tables, protective device requirements and site conditions.