Electronics and electrical Calculators: All 150 Tools
Every electronics and electrical calculator on CalculatorHub, 150 in total, listed alphabetically. Each one is free, works in your browser with no signup, and shows the method it uses. Where a result depends on an external rate, standard or dataset, the supporting source is shown on the page with the date it was last checked. Prefer to search across all 6,718 calculators? Use the tool finder.
- 555 Monostable Timer Calculator: Pulse Width
- 555 Timer Astable Calculator: Frequency and Duty Cycle
- 555 Timer Astable Frequency Calculator
- 555 Timer Monostable Calculator: Output Pulse Width
- 555 Timer Monostable Pulse Calculator
- ADC Resolution Calculator: Step Size and LSB Voltage
- Air-Core Coil Inductance Calculator
- Amps to Watts Calculator: DC, AC Single-Phase and Three-Phase
- Antenna Length Calculator
- Apparent Power Calculator: S = sqrt(P^2 + Q^2)
- Aquarium Heater Wattage Calculator: Sizing by Volume and Temperature
- Band-pass Filter Calculator
- Battery Amp-Hour Runtime Calculator
- Battery Bank Calculator: Battery Capacity for Solar and Backup
- Battery Capacity Calculator
- Battery Life Calculator: Capacity / Load * Efficiency
- Battery Runtime Calculator: How Long Will Your Battery Last?
- Battery Series Parallel Configuration Calculator
- Boost Converter Calculator
- Boost Converter Duty Cycle Calculator
- Buck Converter Calculator
- Buck Converter Duty Cycle Calculator
- Capacitive Reactance Calculator: XC = 1/(2 pi f C)
- Capacitor Charge and Energy Calculator: Q, E, RC Time Constant
- Capacitor Charge Time Calculator
- Capacitor Code Calculator: Three-Digit Code to Picofarads
- Capacitor Discharge Time Calculator
- Capacitor Energy Calculator: Stored Energy and Charge
- Capacitor Ripple Current Calculator: ESR Loss
- Capacitor Series/Parallel Calculator
- Charge Pump Output Calculator
- Circuit Breaker Calculator: NEC Breaker Sizing Tool
- Circuit Power Calculator: Watts from Volts and Amps
- Coaxial Cable Impedance Calculator: Coax Z0
- Crystal Load Capacitance Calculator: Oscillator CL
- Crystal Oscillator Period Calculator
- Current Divider Calculator: Two Parallel Resistors
- Current Sense Resistor Calculator
- DAC Output Voltage Calculator
- dBm to Watts Converter
- Decibel Gain Calculator
- Dipole Antenna Length Calculator 2026: Half-Wave Length from Frequency
- Electric Field Calculator: E = kq/r^2 for Point Charge
- Electric Motor Torque Calculator: Power and RPM
- Electric Potential Energy Calculator: U = kq1q2/r
- Electrical Panel Size Calculator: Service Amps From Load
- Encoder Resolution Calculator
- Filter Cutoff Frequency Calculator
- H-bridge Motor Current Calculator
- Headphone Impedance Calculator: Amplifier Pairing Guide
- Heat Sink Calculator
- Heatsink Thermal Resistance Calculator: Max C/W
- High-pass Filter Calculator
- Inductive Reactance Calculator: XL = 2 pi f L
- Inductor Calculator: Solenoid Inductance and Reactance
- Inductor Color Code Calculator: Four-Band Inductance in Microhenries
- Inductor Stored Energy Calculator
- Inverting Amplifier Calculator
- Junction Thermal Resistance Calculator
- Kirchhoff Calculator: Voltage Law Loop Solver
- LC Filter Cutoff Frequency Calculator
- LC Resonant Frequency Calculator: f = 1/(2pi sqrt(LC))
- LED Array Resistor Calculator: Series String Resistor
- LED Array Series Resistor Calculator
- LED Resistor Calculator: Current Limiting Resistor Value
- Linear Regulator Power Dissipation Calculator
- Logic Gate Calculator: AND, OR, XOR, NAND Outputs
- Loop Gain Calculator
- Low-pass Filter Calculator
- Magnetic Force on Charge Calculator: F = QvB sin(theta)
- Microstrip Impedance Calculator: PCB Trace Z0
- Non-Inverting Amplifier Calculator
- Ohm's Law Power Calculator: P = VI, V = IR, P = I^2 R
- Ohm's Law Voltage Calculator (V = IR)
- Op-amp Gain (inverting) Calculator
- Op-amp Gain (non-inverting) Calculator
- Op-Amp Gain Calculator
- Parallel Resistor Calculator: Total Resistance up to 6 Resistors
- PCB Trace Resistance Calculator: Copper Track Ohms
- PCB Trace Width Calculator
- Phase Margin Calculator
- Pi Attenuator Calculator (loss ratio)
- Power Factor Calculator: Real, Apparent, and Reactive Power
- Power Inverter Sizing Calculator
- Power Ratio to Decibels Calculator
- PWM Average Voltage Calculator: Duty Cycle Output
- PWM Duty Cycle Calculator: Duty, Period and Average Voltage
- Quality Factor Calculator
- Quarter-Wave Antenna Length Calculator
- RC Charge Percentage Calculator: Time Constant
- RC Charging Voltage Calculator: V = V0(1 - e^(-t/RC))
- RC Filter Cutoff Calculator
- RC High Pass Filter Cutoff Calculator
- RC Low Pass Filter Cutoff Calculator
- RC Snubber Resistor Calculator
- Receive Antenna Gain Calculator: DBi and DBd
- Regulator Heat Dissipation Calculator 2026: Linear Regulator Power
- Regulator Heatsink Sizing Calculator
- Resistor Color Code Calculator (4-Band)
- Resistor Color Code Calculator: Value from the Bands
- Resistor Power Dissipation Calculator
- RL Filter Cutoff Calculator
- RL Time Constant Calculator: Tau = L/R
- RLC Impedance Calculator: Series Circuit Impedance
- RLC Impedance Calculator: Series Circuit Z, Resonance, Q Factor
- RMS to Peak Voltage Converter (Sine Wave)
- RMS Voltage Calculator: Peak to RMS for a Sine Wave
- Room Lumens Needed Calculator 2026: Lighting by Floor Area
- RTD Resistance Calculator
- Schmitt Trigger Threshold Calculator
- Series and Parallel Resistor Calculator
- Series Capacitance Calculator
- Series Resistor Calculator: Total Resistance up to 6 Resistors
- Servo Pulse Width Calculator
- Shunt Resistor Power Calculator
- Skin Depth Calculator: AC Conductor Penetration
- Slew Rate Bandwidth Calculator: Op-Amp FPBW
- SMD Resistor Code Calculator: Three-Digit Code to Ohms
- Solar Charge Controller Sizing Calculator
- Solenoid Magnetic Field Calculator: B = mu0 * n * I
- Speaker Wattage Calculator: Amplifier Power for Any Room
- Stepper Motor Steps per mm Calculator: Belt and Leadscrew Axes
- Strain Gauge Resistance Change Calculator
- T Attenuator Calculator (loss ratio)
- Thermistor Resistance Calculator
- Thermocouple Voltage (linear) Calculator
- Three-Phase Current Calculator: I = P/(sqrt(3) VL pf)
- Toroid Inductance Calculator: AL or Geometry
- Total Harmonic Distortion Calculator
- Transformer Calculator: Turns Ratio, Voltage, Current
- Transformer Efficiency Calculator: Pout/(Pout + Losses)
- Transformer Turns Ratio Calculator: Voltage, Current and Turns
- Transistor Base Resistor Calculator
- Twisted Pair Impedance Calculator: Two-Wire Z0
- Voltage Divider Calculator: Vout, Current, Power
- Voltage Doubler Output Calculator
- Voltage Drop Calculator: NEC Wire Run Voltage Loss
- Voltage Regulator Resistor Calculator (LM317)
- Voltage Tripler Output Calculator
- VSWR Calculator: Reflection, Return Loss, Mismatch
- Watts to Amps Calculator: DC, AC Single-Phase and Three-Phase
- Wavelength to Frequency Calculator
- Wheatstone Bridge Calculator: Find Unknown Resistance
- Wheatstone Bridge Output Calculator
- Wire Gauge Calculator: AWG Ampacity and Resistance (NEC 310.15)
- Wire Voltage Drop Calculator
- Wire Voltage Drop Calculator (NEC Method)
- Zener Diode Calculator
- Zener Diode Series Resistor Calculator
- Zener Regulator Resistor Calculator 2026: Series Resistor Value