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.
Voltage Divider Calculator
Calculate output voltage, current, and power in a voltage divider circuit.
LED Resistor Calculator
Calculate the required resistor value to safely operate an LED.
Battery Life Calculator
Calculate battery life, total energy, and watt-hours from capacity and load.
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.
Cable Size Calculator
Calculate proper cable size based on current and distance.
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.
LED Resistor Calculator
Calculate required resistor for LED.
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