Electrical Calculators
Free electrical calculators for Ohm's law, wire sizing and cable ampacity, voltage drop, power conversions, transformers, power factor correction, battery banks, ground rods, motors and run capacitors, fault current, electrical load and service size, junction box fill, transformer voltage drop, UPS runtime, battery charging, and generator fuel use and runtime. 54 calculators across 5 categories.
DC/AC Circuits
Cable & Protection
Voltage Drop CalculatorOpen →Wire Resistance CalculatorOpen →Wire Size CalculatorOpen →Breaker Size CalculatorOpen →Conduit Fill CalculatorOpen →Cable Tray Fill CalculatorOpen →Fault Current CalculatorOpen →Cable Ampacity CalculatorOpen →Ground Rod CalculatorOpen →Electrical Load CalculatorOpen →Box Fill CalculatorOpen →
AC & Three Phase
Amps to Watts CalculatorOpen →Watts to Amps CalculatorOpen →Power Factor CalculatorOpen →Amps to Volts CalculatorOpen →kW to Amps CalculatorOpen →Volts to Amps CalculatorOpen →Amps to kW CalculatorOpen →Watts to Volts CalculatorOpen →Volts to Watts CalculatorOpen →kVA to kW CalculatorOpen →kW to kVA CalculatorOpen →kVA to Amps CalculatorOpen →Amps to kVA CalculatorOpen →Energy Cost CalculatorOpen →Motor FLA CalculatorOpen →Three Phase Power CalculatorOpen →Transformer Turns Ratio CalculatorOpen →Generator Size CalculatorOpen →Power Factor Correction CalculatorOpen →Transformer Size CalculatorOpen →Generator Fuel Consumption CalculatorOpen →Transformer Voltage Drop CalculatorOpen →
Electronics
Resistor Color Code CalculatorOpen →LED Resistor CalculatorOpen →Capacitor Energy CalculatorOpen →Battery Life CalculatorOpen →RC Time Constant CalculatorOpen →555 Timer CalculatorOpen →LC Resonant Frequency CalculatorOpen →Inductor Energy CalculatorOpen →Capacitive Reactance CalculatorOpen →Inductive Reactance CalculatorOpen →Amp Hour CalculatorOpen →Battery Bank CalculatorOpen →Battery Charge Time CalculatorOpen →UPS Runtime CalculatorOpen →