# KWCalc

KWCalc provides 270+ free, accurate online engineering calculators for electrical power systems, HVAC, pump sizing, battery backup, motor controls, solar energy, electric vehicles, and more.

## Categories

- [Power System Calculators](https://kwcalc.com/power-system/): Calculators for electrical engineering, reactive power, AC/DC parameters, capacitance, and inductors.
- [HVAC Calculators](https://kwcalc.com/HVAC/): CFM, BTU, air conditioning tonnage, and AHU sizing calculators.
- [Pump Calculators](https://kwcalc.com/pumps/): Flow rate, total dynamic head (TDH), water horsepower, and swimming pool pump sizing calculators.
- [Battery Calculators](https://kwcalc.com/battery/): AH to Wh, battery runtime, charging time, and battery bank sizing calculators.
- [Electric Vehicle (EV) Calculators](https://kwcalc.com/ev/): EV charging speed, cost, range, and battery calculations.
- [Motor Calculators](https://kwcalc.com/motor/): Electric motor full load amps (FLA), torque, speed, and efficiency calculators.
- [Solar Calculators](https://kwcalc.com/solar/): Solar panel sizing, energy production, battery bank, and inverter load calculators.
- [Transformer Calculators](https://kwcalc.com/transformer/): Transformer sizing, turns ratio, secondary voltage, and inrush current calculations.
- [Cable and Wires Calculators](https://kwcalc.com/cable-and-wires/): Wire sizing (AWG), ampacity, voltage drop, and conduit fill calculators.
- [Panel Design Calculators](https://kwcalc.com/panel-design/): Busbar sizing, short circuit ratings, and panel component sizing tools.
- [Power Factor Calculators](https://kwcalc.com/power-factor/): Power factor correction, active/reactive power, and capacitor bank calculators.
- [Generator Calculators](https://kwcalc.com/generator/): Generator sizing, fuel consumption, runtime, and exhaust pipe sizing tools.
- [Advance Tools](https://kwcalc.com/advance-tools/): Complex engineering calculations including earthing system design and power factor panel component selections.