Transformer Calculator
Calculate transformer output voltage, turns ratio, and current ratio.
Capacitor Energy Calculator
Calculate stored energy, charge, and electric field in a capacitor.
Wire Gauge Calculator
Calculate the appropriate wire gauge (AWG), resistance, and maximum current capacity.
Power Factor Calculator
Calculate power factor, reactive power, and phase angle from real and apparent power.
Inductor Calculator
Calculate inductance value and stored energy in inductors (L, E=½LI²)
Reactance Calculator
Calculate capacitive and inductive reactance for capacitors and inductors (Xc, Xl)
Resonance Calculator
Calculate resonance frequency and Q-factor for LC resonant circuits (f = 1/2π√LC)
Decibel Calculator
Calculate decibel levels, gain, and loss for power and voltage signals (dB, dBm, dBW)
PCB Trace Width Calculator
Calculate copper trace width for PCB boards based on current and temperature rise (IPC-2221)
Extended Voltage Divider
Calculate voltage divider output.
Extended LED Resistor Calculator
Calculate LED resistor for multiple currents.
Wire Ampacity Calculator
Calculate maximum wire ampacity.
Solar Panel Sizing Calculator
Calculate solar panels needed.
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.
Capacitor Energy Calculator
Calculate energy stored in a capacitor.
Wire Resistance Calculator
Calculate wire resistance based on material, length, and area.
Three-Phase Power Calculator
Calculate power in a three-phase circuit.
Transformer Ratio Calculator
Calculate transformer voltage ratio.
Wire Ampacity Calculator
Calculate current carrying capacity of wire.
Parallel Resistance Calculator
Calculate equivalent resistance in parallel.
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.
Transformer Turns Ratio
Calculate transformer turns ratio.
Power Factor Correction
Calculate capacitor needed for power factor correction.
Series Impedance Calculator
Calculate series RLC circuit impedance.
Motor Efficiency Calculator
Calculate electric motor efficiency.
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.
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