Power Electronics Calculators
Free, instant calculators for hardware engineers. No login required. Enter your parameters and get results with the exact formulas used.
Buck Converter Calculator
Design a step-down DC-DC converter. Calculates duty cycle, inductor, and output capacitor.
Boost Converter Calculator
Design a step-up DC-DC converter. Calculates duty cycle, inductor, and output capacitor.
MOSFET Gate Driver Calculator
Calculate the gate resistor for a target rise time, peak gate current, and switching losses.
Inductor Design Calculator
Size an inductor for a buck topology. Outputs inductance, peak current, and stored energy.
CAN Bus Bit Timing Calculator
Generate prescaler, TSEG1/2, and SJW register values for STM32, ESP32, and NXP S32K.
Voltage Divider Calculator
Auto-calculate R1/R2 from Vin and Vout. Includes power dissipation and divider current.
LED Resistor Calculator
Calculate the current-limiting resistor for LEDs in series. Finds nearest E24 standard value.
RC Filter Calculator
Calculate cutoff frequency and time constant for low-pass and high-pass RC filters.
2nd-Order RLC Filter Calculator
Calculate resonant frequency, Q factor, damping ratio, and bandwidth for series and parallel RLC circuits. Includes an interactive Bode plot.
Sallen-Key Active Filter Designer
Design 2nd-order Sallen-Key op-amp filters with Butterworth, Chebyshev, or Bessel response. Outputs R/C values, gain, and an interactive Bode plot.
Fourier Series Synthesizer & FFT Analyzer
Visualize harmonic synthesis for square, triangle, and sawtooth waves. Analyze FFT frequency spectra of multi-tone signals with noise.
Transfer Function & LTI System Simulator
Enter 1st/2nd-order transfer function coefficients to plot Bode response, step response, and pole-zero map on the s-plane.
PCB Trace Width Calculator (IPC-2221)
Calculate minimum copper trace width for a given current load and allowable temperature rise per the IPC-2221 standard.
Microstrip Impedance Calculator
Compute characteristic impedance (Z₀) of a PCB microstrip transmission line from trace width, copper thickness, and dielectric height.
NE555 Timer Calculator
Calculate R/C values for astable and monostable 555 timer circuits. Simulates output voltage and capacitor charge/discharge waveforms.
Decibel (dB) Power & Voltage Converter
Convert between dBm, Watts, mW, dBV, and Volts for any reference impedance in real time.
PCB Thermal Via Calculator
Estimate equivalent thermal resistance and junction temperature drop for a copper-plated thermal via array under an IC pad.
DC-DC Output Voltage Ripple Calculator
Simulate output voltage ripple from inductor ripple current and capacitor ESR for Buck and Boost converters.
FIR Filter Coefficient Designer (Hamming Window)
Generate Hamming-windowed FIR lowpass filter coefficients. Outputs a copy-ready C array for firmware and plots the frequency response.
Battery Life Calculator
Estimate runtime for embedded and IoT devices. Accounts for DoD and self-discharge rate.
About these calculators
All calculations are performed client-side in your browser using industry-standard formulas from TI, Infineon, and IEEE application notes. Results are for design guidance only — always verify against your component datasheets before manufacturing.