Capacitive Transformerless Power Supply Calculator
Estimate dropper capacitance, currents, ripple, power, and safety margins.
Electronics and Circuits Calculators
Discover free, easy-to-use Electronics and Circuits in our Physics collection. Find the right calculator, simplify complex calculations, understand your results, and export them for use and citation in project reports and research.
Capacitor Calculator
Find capacitor charge, energy, reactance, and AC current quickly
Capacitor Charge Time Calculator
Estimate capacitor charging duration using complete RC circuit values
Capacitor Energy Calculator
Calculate capacitor energy storage and electrical charge quickly
Capacitor Size Calculator
Calculate capacitor requirements for filtering and power supply designs
Capacitors in Series Calculator
Find equivalent capacitance, charge, voltage distribution, and stored energy.
Helical Coil Calculator
Estimate helical coil inductance, resistance, reactance, and quality factor
555 Timer Calculator
Calculate 555 astable frequency, timing intervals, and duty cycle
LED Resistor Calculator
Determine LED resistor value, voltage drop, power, and rating.
High Pass Filter Calculator
Calculate cutoff frequency, reactance, gain, phase, and output voltage
Flyback Converter Calculator
Calculate flyback transformer design, power, timing, currents, and component stresses.
Forward Converter Calculator
Estimate forward converter performance, stresses, timing, and magnetic requirements
Series Resistor Calculator
Calculate resistance, current, voltage drops, and power in series circuits
Crossover Calculator
Design passive audio crossover components for speaker systems
MOSFET Calculator
Calculate MOSFET current, power, switching, and efficiency characteristics
MOSFET Threshold Voltage Calculator
Calculate MOSFET threshold voltage using semiconductor device parameters
Motor Capacitor Size Calculator
Calculate motor run and start capacitor requirements accurately
Shockley Diode Calculator
Calculate diode current, resistance, conductance, power, and thermal voltage
Photon Detection Efficiency Calculator (SiPM)
Compute SiPM photon detection efficiency and expected detected photons
RC Circuit Calculator
Analyze charging, discharging, timing, current, voltage, and energy behavior
Current Divider Calculator
Find parallel branch currents, equivalent resistance, and circuit voltage
Voltage Divider Calculator
Calculate divider voltage, current, resistance, drops, and power
Voltage Regulation Calculator
Measure voltage drop and regulation between no-load and full-load conditions
Low Pass Filter Calculator
Calculate RC filter cutoff, response, attenuation, phase, and output voltage
Three Phase Calculator
Calculate balanced three-phase electrical power, losses, and phase relationships
Ideal Transformer Calculator
Calculate ideal transformer voltages, currents, ratios, power, and impedance
Noise Figure Calculator
Calculate noise figure, gain, signal-to-noise ratios, and equivalent temperature
Resistor Color Code Calculator
Decode resistor bands and calculate resistance, tolerance, and temperature coefficient
Magnetic Force Between Current-Carrying Wires Calculator
Calculate magnetic force between two parallel current-carrying wires
Resistor Noise Calculator
Calculate thermal resistor noise voltage, current, and power
Magnetic Force on a Current-Carrying Wire Calculator
Calculate magnetic force on a current-carrying wire in fields
Resistor Voltage Drop Calculator
Find resistor voltage drop, power, and remaining voltage quickly
Resistor Wattage Calculator
Estimate resistor current, power dissipation, and safe wattage rating
Resonant Frequency Calculator
Find series RLC resonance, reactance, quality factor, and bandwidth
Generator Power Calculator
Estimate generator capacity, output power, losses, and energy consumption
Solenoid Inductance Calculator
Calculate solenoid inductance, magnetic flux, field strength, and stored energy
Solenoid Magnetic Field Calculator
Calculate solenoid magnetic flux density and field strength accurately
Inductor Energy Storage Calculator
Calculate magnetic energy stored in an inductor from inductance and current
Inductors in Parallel Calculator
Find equivalent inductance for multiple inductors connected in parallel
Inductors In Series Calculator
Find equivalent inductance for multiple series-connected inductors quickly
Ohm's Law Calculator
Calculate resistance and power from voltage and current
Transformer Sizing Calculator
Estimate transformer capacity, currents, voltage ratio, and recommended rating
Wheatstone Bridge Calculator
Analyze bridge voltage, currents, balance, resistance, and power relationships
Transistor Biasing Calculator
Analyze voltage-divider bias, currents, voltages, and transistor operation
Spherical Capacitor Calculator
Calculate capacitance, charge, electric fields, and energy in spherical capacitors.
RLC Circuit Calculator
Analyze resonance, impedance, current, phase, power, and bandwidth
RLC Impedance Calculator
Calculate RLC circuit impedance, reactance, phase, and admittance
Boost Converter Calculator
Design boost converters with duty cycle, ripple, and component calculations.
RMS Voltage Calculator
Find RMS voltage from waveform amplitude and offset
Inverting Buck-Boost Converter Calculator
Calculate duty cycle, component values, currents, and converter stresses
Wire Gauge Calculator
Determine wire size from current, distance, voltage, and material
Wire Resistance Calculator
Calculate wire resistance, temperature effects, voltage drop, and power loss
Wire Size Calculator
Determine conductor size, voltage drop, resistance, and power loss
Breaker Size Calculator
Calculate required breaker ratings for electrical loads accurately
Bridge Rectifier Calculator
Calculate bridge rectifier output, ripple, current, and performance
Buck Converter Calculator
Design buck converters with duty cycle, ripple, and component sizing
J-Pole Antenna Calculator
Calculate practical J-pole antenna dimensions and feedpoint placement accurately
Parallel Capacitor Calculator
Find equivalent capacitance, charge, and stored energy for parallel capacitors
Parallel Resistor Calculator
Calculate equivalent resistance, current, power, and branch distribution
Dipole Calculator
Calculate dipole moment, torque, energy, and force accurately
