Electronics Tools
Powerful electronics tools. Electronics calculators, converters, and utilities.
Power & Energy
AC Power Calculator
Calculate real, reactive, and apparent power in AC circuits. Enter circuit values to calculate the selected electrical quantity.
Amps to Watts Converter
Convert between amps and watts for AC and DC systems. Enter circuit values to calculate the selected electrical quantity.
Battery Life Calculator
Estimate how long a battery will last for a given load. Enter circuit values to calculate the selected electrical quantity.
DC Power Calculator
Calculate power in DC circuits using P=IV. Enter circuit values to calculate the selected electrical quantity.
Inverter Size Calculator
Determine the inverter size needed for your appliance load. Enter circuit values to calculate the selected electrical quantity.
Joule's Law Calculator
Calculate heat generated by an electrical current. Enter circuit values to calculate the selected electrical quantity.
LED Savings Calculator
Compare LED vs CFL vs incandescent power usage and savings. Enter circuit values to calculate the selected electrical quantity.
MCU Power Consumption
Estimate microcontroller battery life in active and sleep modes. Enter circuit values to calculate the selected electrical quantity.
Ohm's Law Calculator
Solve for Voltage, Current, or Resistance. Enter circuit values to calculate the selected electrical quantity.
Power Consumption Calculator
Estimate monthly energy usage and electricity cost. Enter circuit values to calculate the selected electrical quantity.
Power Factor Calculator
Calculate power factor, real, reactive, and apparent power. Enter circuit values to calculate the selected electrical quantity.
Universal Power Calculator
Universal AC/DC power calculator — solve for any unknown. Enter circuit values to calculate the selected electrical quantity.
Voltage Divider
Calculate output voltage for resistor divider circuits. Enter circuit values to calculate the selected electrical quantity.
Voltage Drop Calculator
Calculate voltage drop for a given current and wire resistance. Enter circuit values to calculate the selected electrical quantity.
Wattage Calculator
Calculate wattage from voltage and current for any device. Enter circuit values to calculate the selected electrical quantity.
Watt's Law Calculator
Calculate power, voltage, or current using Watt's law. Enter circuit values to calculate the selected electrical quantity.
Components & Substitutions
Air Core Inductor Calculator
Calculate inductance for a single-layer air core coil. Enter circuit values to calculate the selected electrical quantity.
BJT Biasing Calculator
Calculate BJT biasing for DC circuit. Enter circuit values to calculate the selected electrical quantity.
Capacitor Energy/Charge
Calculate energy and charge stored in a capacitor. Enter circuit values to calculate the selected electrical quantity.
Capacitor Code to Value
Decode numeric capacitor values and tolerances. Enter circuit values to calculate the selected electrical quantity.
Coil Inductance Calculator
Calculate coil inductance for series circuits. Enter circuit values to calculate the selected electrical quantity.
Current Divider Calculator
Calculate current division for parallel circuits. Enter circuit values to calculate the selected electrical quantity.
Inductor Value
Decode inductor color bands and numeric codes. Enter circuit values to calculate the selected electrical quantity.
MOSFET Gate Charge Calculator
Calculate MOSFET gate charge. Enter circuit values to calculate the selected electrical quantity.
NTC Thermistor
Calculate temperature from NTC resistance using Steinhart-Hart. Enter circuit values to calculate the selected electrical quantity.
Op-Amp Calculator
Solve for inverting and non-inverting op-amp Gain. Enter circuit values to calculate the selected electrical quantity.
PT100/PT1000
Convert RTD resistance to temperature. Enter circuit values to calculate the selected electrical quantity.
RC Time Constant
Calculate RC time constant for a given RC circuit. Enter circuit values to calculate the selected electrical quantity.
Resistor Color Code
Identify resistor values from color bands. Enter circuit values to calculate the selected electrical quantity.
Resistor for LED Calculator
Find the correct series resistor for an LED. Enter circuit values to calculate the selected electrical quantity.
RL Time Constant
Calculate RL time constant for a given RL circuit. Enter circuit values to calculate the selected electrical quantity.
RLC Circuit Resonant Frequency
Calculate RLC circuit resonant frequency for a given RLC circuit. Enter circuit values to calculate the selected electrical quantity.
Series and Parallel Capacitance
Calculate total capacitance for series and parallel circuits. Enter circuit values to calculate the selected electrical quantity.
Series and Parallel Inductance
Calculate total inductance for series and parallel circuits. Enter circuit values to calculate the selected electrical quantity.
Series and Parallel Resistance
Calculate total resistance for series and parallel circuits. Enter circuit values to calculate the selected electrical quantity.
555 Timer Calculator
Calculate frequency and duty cycle for 555 timer circuits. Enter circuit values to calculate the selected electrical quantity.
Transformer Turns Ratio
Calculate transformer turns ratio for a given transformer. Enter circuit values to calculate the selected electrical quantity.
Transistor Switch
Calculate base resistor for BJT switching circuits. Enter circuit values to calculate the selected electrical quantity.
Wheatstone Bridge
Solve for bridge balance and unknown resistance. Enter circuit values to calculate the selected electrical quantity.
Signals & Oscillators
ADC Resolution Calculator
Calculate ADC resolution and quantization error. Enter circuit values to calculate the selected electrical quantity.
Antenna Length Calculator
Calculate antenna length for a given frequency. Enter circuit values to calculate the selected electrical quantity.
Baud Rate Calculator
Calculate baud rate and data transfer time. Enter circuit values to calculate the selected electrical quantity.
Clock Cycle Calculator
Calculate clock cycles, period, and frequency. Enter circuit values to calculate the selected electrical quantity.
Coax Cable Loss Calculator
Calculate signal loss in coaxial cables. Enter circuit values to calculate the selected electrical quantity.
dBm to mW Converter
Convert between dBm and milliwatts. Enter circuit values to calculate the selected electrical quantity.
Decibel Calculator
Calculate gain and loss in decibels. Enter circuit values to calculate the selected electrical quantity.
Duty Cycle Calculator
Calculate duty cycle from on/off times. Enter circuit values to calculate the selected electrical quantity.
Duty Cycle to Time
Convert duty cycle percentage to on/off times. Enter circuit values to calculate the selected electrical quantity.
Frequency to Wavelength
Convert radio frequency to wavelength. Enter circuit values to calculate the selected electrical quantity.
Oscillation Frequency
Calculate oscillator frequency from LC or RC values. Enter circuit values to calculate the selected electrical quantity.
PCB Impedance Calculator
Calculate PCB trace impedance. Enter circuit values to calculate the selected electrical quantity.
PCB Trace Width Calculator
Calculate minimum PCB trace width for a given current. Enter circuit values to calculate the selected electrical quantity.
Propagation Delay Calculator
Calculate signal propagation delay in PCB traces. Enter circuit values to calculate the selected electrical quantity.
PWM Duty Cycle Calculator
Calculate PWM duty cycle and average voltage. Enter circuit values to calculate the selected electrical quantity.
PWM Frequency Calculator
Calculate PWM frequency and period. Enter circuit values to calculate the selected electrical quantity.
RF Attenuator Calculator
Calculate RF attenuator resistor values. Enter circuit values to calculate the selected electrical quantity.
Sample Rate (Nyquist)
Calculate minimum sample rate using Nyquist theorem. Enter circuit values to calculate the selected electrical quantity.
Signal-to-Noise Ratio
Calculate SNR in decibels. Enter circuit values to calculate the selected electrical quantity.
SWR Calculator
Calculate Standing Wave Ratio for RF systems. Enter circuit values to calculate the selected electrical quantity.
Timer Prescaler Calculator
Calculate microcontroller timer prescaler values. Enter circuit values to calculate the selected electrical quantity.
UART Baud Accuracy
Calculate UART baud rate error and accuracy. Enter circuit values to calculate the selected electrical quantity.
VSWR to Return Loss
Convert VSWR to return loss and reflection coefficient. Enter circuit values to calculate the selected electrical quantity.
Wavelength to Frequency
Convert wavelength to radio frequency. Enter circuit values to calculate the selected electrical quantity.