5 subcategories · 60 calculators
Electrical
Free electrical calculators for circuit analysis, power and energy, wire sizing, and lighting design.
Subcategories
Basic Circuits
Ohm's law, voltage divider, series and parallel resistance calculators.
Power & Energy
Watts, kilowatts, kWh, energy cost, amps-to-kW, and power conversion calculators.
Lighting
Lumens, lux, candela, LED wattage, and lighting layout calculators.
Wiring
Wire gauge (AWG), ampacity, voltage drop, and conduit fill calculators.
Electrical Converters
Electrical unit converters for charge, potential, resistance, capacitance, and more.
Popular tools
Electrical / Wiring
AWG to mm Calculator
Convert AWG to mm, mm², inches, kcmil, and copper resistance with a full wire gauge reference chart for metric cable comparisons.
Electrical / Electrical Converters / Unit Converters
Battery Energy Converter
Use this battery energy converter to convert mAh, Ah, Wh, kWh, watts, kilowatts, and runtime with voltage, usable capacity.
Electrical / Basic Circuits
Capacitance Calculator
Calculate capacitance from charge and voltage, plate geometry, or frequency and reactance, then review readable units, dielectric shortcuts.
Electrical / Electrical Converters / Unit Converters
Capacitance to Charge Calculator
Use a capacitance to charge calculator to convert capacitance and voltage into coulombs with Q = C × V, farad normalization, and mC, µC, and nC outputs.
Electrical / Power & Energy
Capacitor Energy Calculator
Calculate capacitor stored energy in joules from capacitance and voltage, solve required capacitance or voltage, and compare charge, watt-hours.
Electrical / Wiring
Conduit Fill Calculator
Find the minimum conduit trade size for mixed THHN/THWN-2 or XHHW/XHHW-2 conductor groups and compare conduit fill across EMT, IMC, RMC, and PVC raceways.