Extended Voltage Divider
Calculate voltage divider output.
Extended LED Resistor Calculator
Calculate LED resistor for multiple currents.
Wire Ampacity Calculator
Calculate maximum wire ampacity.
Resistor Network Calculator
Calculate equivalent resistance for series/parallel.
Transformer Ratio Calculator
Calculate transformer turns ratio.
Solar String Calculator
Calculate solar panel string size.
LED Strip Power Calculator
Calculate LED strip power supply needs.
Motor Current Calculator
Calculate electric motor current draw.
Resistor Voltage Divider Calculator
Calculate output voltage of resistor divider.
UPS Sizing Calculator
Calculate appropriate UPS size.
Power Factor Correction Calculator
Calculate capacitors for power factor correction.
Battery Series/Parallel Calculator
Calculate voltage and capacity for battery connections.
RC Circuit Calculator
Calculate RC circuit time constant.
RL Circuit Calculator
Calculate RL circuit time constant.
Transformer Turns Ratio
Calculate transformer turns ratio and voltage.
DC Motor Calculator
Calculate DC motor speed and torque.
Wire Resistance Calculator
Calculate wire resistance based on material, length, and area.
Circuit Breaker Size Calculator
Calculate appropriate circuit breaker size.
Battery Capacity and Runtime Calculator
Calculate device runtime from battery.
Electrical Cable Sizing Calculator
Calculate appropriate cable size.
Antenna Calculator
Calculate antenna dimensions and length based on frequency (dipole, monopole, Yagi)
Inrush Current Calculator
Calculate initial inrush current surge at startup for motors, transformers, and capacitors
Extended Capacitor Energy
Calculate capacitor energy and charge.
Inductor Reactance Calculator
Calculate inductor reactance at a frequency.
Power Factor Correction
Calculate capacitor needed for power factor correction.
Series Impedance Calculator
Calculate series RLC circuit impedance.
Fuse Rating Calculator
Calculate appropriate fuse rating.
Generator Load Calculator
Calculate required generator size.
Capacitor Bank Calculator
Calculate capacitor bank for power factor correction.
Earth Resistance Calculator
Calculate earthing system resistance.
DC Wire Sizing Calculator
Calculate appropriate DC wire gauge.
RLC Circuit Calculator
Calculate RLC circuit properties.
Electrical Conduit Fill Calculator
Calculate wire fill in conduit.
Zener Diode Calculator
Calculate zener diode resistor and current.
Earthing Resistance Calculator
Calculate earthing system resistance.
Capacitor Energy Storage Calculator
Calculate energy stored in a capacitor.
Inductor Energy Storage Calculator
Calculate energy stored in an inductor.
Voltage Regulator Calculator
Calculate linear voltage regulator components.
Motor Starting Current Calculator
Calculate electric motor starting current.
Solar Charge Controller Calculator
Calculate charge controller size for solar system.
RLC Resonant Frequency Calculator
Calculate resonant frequency of RLC circuit.
Series Impedance Calculator (RCL)
Calculate total impedance in series circuit.
Resistors in Series Calculator
Free online calculator with instant, accurate results.
Resistors in Parallel Calculator
Free online calculator with instant, accurate results.
Capacitors in Series Calculator
Free online calculator with instant, accurate results.
Capacitors in Parallel Calculator
Free online calculator with instant, accurate results.
kVA to Amps Calculator
Free online calculator with instant, accurate results.
Amps to kVA Calculator
Free online calculator with instant, accurate results.
About Electrical Tools
Our Electrical Tools calculators are designed to help you solve complex problems and get accurate results quickly.
Top Electrical Tools Calculators
Electricity Bill Calculator
Calculate monthly and annual electricity consumption cost based on power usage and rates (kWh)
Ohms Law Calculator
Calculate voltage, current, and resistance using Ohm's Law (V=IR) for electrical circuits
Electrical Power Calculator
Calculate electrical power in watts using voltage and current (P=VI, P=I²R, P=V²/R)
Resistor Color Code Calculator
Calculate resistor value and tolerance from color bands (4-band, 5-band, 6-band)
LED Resistor Calculator
Calculate current limiting resistor value for LED circuits and arrays