All Calculators
108 interactive electronics engineering calculators — all run locally in your browser.
Power Electronics
27 toolsVoltage Divider
Calculate output voltage from resistor divider networks.
Ohm's Law
Calculate voltage, current, resistance, and power.
Resistor Parallel
Find equivalent resistance for parallel resistor networks.
Wheatstone Bridge
Analyze bridge circuits for sensor applications.
RC Filter
Design low-pass and high-pass RC filters with cutoff frequency.
Current Divider
Calculate current distribution in parallel branches.
Power Calculator
Compute electrical power, energy, and efficiency.
Thevenin Equivalent
Simplify complex circuits to Thevenin equivalent.
Energy Calculator
Calculate energy consumption, storage, and cost.
Buck Converter
Design step-down DC-DC converters with inductor and capacitor.
Boost Converter
Design step-up DC-DC converters for higher output voltage.
Current Limiter
Design current limiting circuits with transistor or IC.
Power Supply
Design linear and switching power supply circuits.
Buck-Boost
Design non-inverting buck-boost and SEPIC converters.
Flyback Converter
Design isolated flyback converters with transformer.
PWM Frequency
Select optimal PWM frequency for motors, LEDs, and converters.
Duty Cycle
Calculate PWM duty cycle, on-time, and off-time.
Inductor Saturation
Check if inductor will saturate in your DC-DC design.
PWM to Voltage
Convert PWM signal to analog voltage with filter.
Cable Resistance
Calculate wire resistance by gauge, length, and temperature.
Cable Loss
Compute signal and power loss in cables and transmission lines.
Solar Panel
Size solar panels for battery charging and off-grid systems.
Power Budget
Create power budgets for embedded and IoT systems.
Zener Diode
Design Zener diode voltage regulator circuits.
Relay Coil Suppression
Design snubber circuits for relay and solenoid coils.
Decoupling Capacitor
Select decoupling capacitors for power integrity.
Resistor Color Code
Decode 4, 5, and 6 band resistor color codes.
Analog Electronics
14 toolsOp-Amp Gain
Calculate gain for inverting, non-inverting, and differential amps.
Sallen-Key Filter
Design active filters with Sallen-Key topology.
Impedance
Calculate impedance for R, L, C in series and parallel.
RLC Resonant
Analyze series and parallel RLC resonance, Q factor.
Inductor Impedance
Calculate inductive reactance vs frequency.
Capacitor Impedance
Calculate capacitive reactance vs frequency.
Instrumentation Amp
Design precision differential amplifiers with high CMRR.
Noise Calculator
Budget system noise: thermal, shot, flicker, and op-amp.
ADC Resolution
Calculate ADC step size, dynamic range, and ENOB.
ADC Anti-Aliasing
Design anti-aliasing filters for ADCs.
Op-Amp Slew Rate
Check amplifier slew rate vs signal bandwidth and amplitude.
Analog Filter Designer
Design Butterworth, Bessel, Chebyshev filters.
Audio Amplifier
Design audio power amplifiers and speaker matching.
Differential Pair
Design differential transmission lines for high-speed PCB.
PCB Design
8 toolsPCB Trace Width
Calculate PCB trace width for current and temperature rise.
PCB Stackup
Design PCB layer stackup for controlled impedance.
PCB Assembly Cost
Estimate PCB assembly cost by board specs and quantity.
Pull-up Resistor
Calculate pull-up resistor values for I2C and digital circuits.
PCB Thermal Relief
Design thermal relief pads for soldering and current.
PCB Panelization
Optimize PCB panel layout for manufacturing.
Grounding Shielding
Design grounding strategies and EMI shielding.
Bus Termination
Calculate termination resistors for high-speed buses.
Digital Logic
5 toolsDigital Logic Gates
Simulate AND, OR, NOT, NAND, NOR, XOR logic gates.
Flip-Flop Timing
Analyze setup, hold, and propagation delay timing.
Shift Register
Calculate shift register timing and cascade parameters.
Binary Converter
Convert between binary, hex, decimal, and octal.
555 Timer
Design 555 timer astable, monostable, and bistable circuits.
Embedded Systems
9 toolsI2C Bus Timing
Calculate I2C bus speed, rise time, and pull-up values.
SPI Timing
Calculate SPI clock, setup, and hold timing parameters.
Logic Level Shifter
Design voltage level translation circuits.
GPIO Current
Verify GPIO current capacity for microcontroller designs.
Thermocouple
Convert thermocouple voltage to temperature with CJC.
CAN Bus Timing
Calculate CAN bus bit timing and sample point.
USB PD
Calculate USB Power Delivery parameters up to 240W.
USB 3.0 Power
Verify USB 3.0/3.1 power delivery and cable requirements.
Oscilloscope Probe
Calculate probe compensation and loading effects.
STM32 Design
3 toolsMotor & Motion
7 toolsMotor Torque
Calculate motor torque, power, and speed relationships.
Motor Speed
Calculate motor RPM from frequency, poles, and slip.
Motor Power
Calculate motor electrical and mechanical power.
Gear Ratio
Calculate gear ratios, speed reduction, torque multiplication.
Motor Starting Current
Stepper Motor
Servo Sizing
Battery & Power
4 toolsRF & Wireless
8 toolsMicrostrip Calculator
Design microstrip transmission lines on PCB.
Smith Chart
Visualize impedance matching with interactive Smith Chart.
VSWR
Calculate VSWR, return loss, and reflection coefficient.
Impedance Matching
Design L, Pi, and T impedance matching networks.
RF Attenuator
Design Pi, T, and bridged-T RF attenuators.
Antenna Length
Calculate optimal antenna length for any frequency.