Electrical Tools

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

Battery Life Calculator

Calculate battery runtime and life based on capacity (mAh/Ah) and load current

Voltage Divider Calculator

Calculate output voltage in voltage divider circuits using series resistors

Series & Parallel Resistors Calculator

Calculate total equivalent resistance for resistors in series or parallel configurations

Wire Gauge Calculator

Calculate wire diameter, cross-section area, and current carrying capacity (AWG standard)

Voltage Drop Calculator

Calculate voltage drop in electrical cables and wires based on length, current, and resistance

Three Phase Calculator

Calculate power, current, and voltage for 3-phase electrical systems (Star/Delta)

555 Timer Calculator

Calculate resistor and capacitor values for 555 timer circuits (astable/monostable modes)

Solar Panel Calculator

Calculate required number and capacity of solar panels for photovoltaic system design

Electrical Load Calculator

Calculate total electrical load, power demand, and sizing for residential/commercial buildings

Capacitor Energy Calculator

Calculate energy stored in a capacitor.

Three-Phase Power Calculator

Calculate active, apparent, and reactive power in three-phase systems.

Cable Size Calculator

Calculate appropriate cable size based on current and distance.

Series/Parallel Resistance Calculator

Calculate equivalent resistance for series or parallel circuit.

Battery Capacity Calculator

Calculate battery capacity and runtime.

Solar Panel Sizing Calculator

Calculate number of solar panels needed.

Capacitor Calculator

Calculate capacitance, charge, and stored energy in capacitors (Q=CV, E=½CV²)

Transformer Calculator

Calculate transformer turns ratio, voltage, and current transformation (Vp/Vs = Np/Ns)

AC Circuit Calculator

Calculate impedance, phase angle, and power in AC circuits (RLC analysis)

Impedance Calculator

Calculate total impedance from resistance and reactance in AC circuits (Z = √(R²+X²))

Power Factor Calculator

Calculate power factor and required capacitance for power factor correction (PF = cosφ)

Op-Amp Calculator

Calculate gain and resistor values for op-amp circuits (inverting/non-inverting)

LM317 Voltage Regulator Calculator

Calculate resistor values for desired output voltage from LM317 adjustable regulator

Frequency Calculator

Calculate frequency, period, and wavelength for electrical signals (f = 1/T)

Electric Motor Calculator

Calculate motor power, current, efficiency, and torque for AC/DC motors (HP to kW)

Inductor Energy Calculator

Calculate energy stored in an inductor.

RC Circuit Time Constant Calculator

Calculate time constant of an RC circuit.

RL Circuit Time Constant Calculator

Calculate time constant of an RL circuit.

Electric Motor Power Calculator

Calculate power, torque, and efficiency of an electric motor.

Capacitor Code Calculator

Convert 3-digit capacitor code to capacitance value.

Extended Ohms Law Calculator

Calculate voltage, current, resistance, and power.

Battery Runtime Calculator

Calculate battery runtime.

Energy Consumption Calculator

Calculate energy consumption of devices.

Three Phase Power Calculator

Calculate three-phase electrical power.

Cable Voltage Drop Calculator

Calculate voltage drop in cable.

Breaker Sizing Calculator

Calculate appropriate breaker size.

Parallel Resistance Calculator

Calculate equivalent resistance of parallel resistors.

Advanced LED Resistor

Calculate resistor for multiple LEDs in series/parallel.

Generator Sizing Calculator

Calculate proper generator size for your needs.

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)