Category
Circuit & PCB Design
Board layout, analog fundamentals, power electronics, impedance, and thermal design calculators.
PCB Trace Width Calculator
Estimate external trace width from current and copper weight.
555 Timer Astable Circuit Configurator
Input R1, R2, and C to calculate frequency and duty cycle.
Voltage Divider Calculator
Find resistor values for a target output voltage.
LED Series Resistor Calculator
Size current-limiting resistors for LEDs.
Op-Amp Gain Calculator
Calculate inverting, non-inverting, and differential gain.
Passive Filter Designer
Design RC, RL, and LC low-pass or high-pass cutoffs.
Inductor Color Code Calculator
Decode inductor markings into inductance values.
Decibel to Voltage/Power Converter
Convert dB relationships into voltage and power ratios.
Wheatstone Bridge Calculator
Solve bridge balance and unknown resistance values.
Star-Delta Transformation Tool
Convert Y and delta resistor networks.
Skin Depth Calculator
Estimate conductor skin depth at high frequency.
Microstrip Impedance Calculator
Estimate controlled impedance for PCB traces.
Battery Life Calculator
Estimate runtime from capacity and average current draw.
Transformer Turns Ratio & Efficiency Calculator
Relate winding ratio, voltage, current, and losses.
Zener Diode Voltage Regulator Designer
Size simple shunt regulator components.
Series/Parallel Impedance Solver
Solve complex impedance networks.
Via Current Capacity Calculator
Estimate current handling for plated vias.
Differential Pair Impedance Tool
Size high-speed differential traces.
Buck/Boost Converter Component Finder
Choose approximate switching-regulator components.
Unit Converters
Convert mils, millimeters, copper ounces, and microns.
Thermal Resistance/Heatsink Sizing Tool
Estimate junction temperature and heatsink requirements.