Wiring, Cables & Home Electrical
Every wiring, cables & home electrical calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
12 calculators in this section
- AC Tonnage Calculator (Room Size to Tons)Room size, people, sun, floor and climate to a cooling load in tons, kW and BTU/h — every contribution on its own line — plus the running current at your voltage and the units a month at your usage.
- AWG Wire Size CalculatorDiameter, cross-sectional area and resistance of any American Wire Gauge size from 4/0 to 40, for copper and aluminium — and the reverse: the AWG size nearest to a metric area in mm².
- Earthing / Grounding Resistance CalculatorThe resistance of a driven rod by Dwight's formula, and of a row of rods with the interaction between them worked out properly — with the efficiency you actually get, and a plain account of why the answer must still be measured on site.
- Electricity Consumption Calculator (Units per Month)Add up to six appliances — watts, hours a day and how many you own — and see the units (kWh) each one costs you a day, a month and a year, plus the bill at your own rate per unit.
- Generator (DG) Size CalculatorAdd up to six loads with their power factors and starting multiples and get the running kW and kVA, the worst-case starting demand, the set size to buy with your own margin, the running and starting currents, and the fuel it will burn.
- kVA to kW Calculator (and kW to kVA)Convert apparent power to real power and back at any power factor, and get the full-load current at your voltage — the arithmetic behind every generator, UPS and transformer rating.
- MCB Size CalculatorTurn a load in watts or amps into a design current and the next standard MCB rating from the IEC 60898-1 preferred list — with the trip curve that suits the load and the check that matters most: the breaker must protect the cable.
- Power Factor and PF Correction Capacitor CalculatorYour present power factor from kW and kVA — or from kW, volts and amps — then the kVAR and the microfarads of capacitance that lift it to the target, for a single-phase load or a star or delta bank at 50 or 60 Hz.
- Three-Phase Power CalculatorReal, reactive and apparent power from line voltage, line current and power factor — plus the phase voltage, phase current and per-phase impedance for a balanced star or delta load.
- Voltage Drop CalculatorThe voltage a cable loses at your load current — in volts and as a percentage — with the voltage left at the load and the power wasted as heat, for mm² or AWG, copper or aluminium, DC, single-phase or three-phase.
- Watts to Amps Calculator (and Amps to Watts)Convert power to current, or current to power, for DC, single-phase AC and three-phase AC — with the power factor where it belongs and the current every common household appliance draws at 230 V.
- Wire Size Calculator (Current and Voltage Drop)The smallest standard cable size that keeps the voltage drop within your limit, for DC, single-phase or three-phase circuits in copper or aluminium — with the actual drop, the voltage at the load, the power lost in the cable and a check against the ampacity from your code's table.