Engineering Calculators

Interactive calculators for power electronics and RF/analog design. All calculations run in your browser — no data sent anywhere.

Buck Converter Inductor & Capacitor L_min, Cout, duty cycle, and peak current for a synchronous buck in CCM.

PCB Trace Width (IPC-2221) Minimum copper trace width for a given current and temperature rise. External and internal layers.

MOSFET Power Loss Conduction, switching, and gate drive power losses for hard-switched power MOSFETs.

Resistive Voltage Divider Vout, divider ratio, and quiescent current. Useful for feedback networks and ADC input scaling.

Circuit Analysis

RC Filter Cutoff Frequency Cutoff frequency (-3 dB), time constant, and attenuation for single-pole RC filters.

dBm ↔ mW ↔ Vrms Converter Convert between dBm, milliwatts, watts, and RMS voltage. Adjustable reference impedance.

555 Timer — Astable Mode Frequency, duty cycle, and period for 555 astable oscillator. Standard 2-resistor + cap circuit.

LC Resonant Frequency Resonant frequency and angular frequency for an LC tank or filter. Includes reactance at resonance.

Zener Shunt Regulator Series resistor Rs, max zener current, and power dissipation for a zener shunt supply.

BJT Common-Emitter Bias Voltage-divider bias point: Vb, Ve, Ic, Vce, and bias stability check.