Category

Electronics & PCB Design

Electronics, board layout, analog fundamentals, power systems, impedance, and thermal design calculators.

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Wire Gauge Voltage Drop Calculator

Estimate round-trip DC voltage drop for common copper AWG sizes from load current, run length, and source voltage.

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Three-Phase Power Calculator

Calculate real power, apparent power, reactive power, and phase current for a balanced three-phase load.

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Power Factor Correction Calculator

Estimate capacitor kvar and capacitance needed to raise a load from an existing power factor to a target power factor.

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RC Time Constant Calculator

Calculate RC time constant, common settling times, and cutoff frequency from resistance and capacitance.

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RL Time Constant Calculator

Calculate RL time constant, current-rise milestones, and equivalent cutoff frequency from inductance and resistance.

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RLC Damping Ratio Calculator

Calculate natural frequency, damping ratio, Q factor, and damping classification for a series RLC circuit.

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Capacitive Reactance Calculator

Calculate capacitor reactance, impedance magnitude, and AC current at a selected frequency.

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Inductive Reactance Calculator

Calculate inductor reactance, impedance magnitude, and AC current at a selected frequency.

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Fuse / Breaker Sizing Calculator

Estimate a protective device size from continuous load current, design multiplier, and derating factor.

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PCB Trace Width Calculator

Estimate external trace width from current and copper weight.

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555 Timer Astable Circuit Configurator

Input R1, R2, and C to calculate frequency and duty cycle.

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Voltage Divider Calculator

Find resistor values for a target output voltage.

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LED Series Resistor Calculator

Size current-limiting resistors for LEDs.

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Op-Amp Gain Calculator

Calculate inverting, non-inverting, and differential gain.

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Passive Filter Designer

Design RC, RL, and LC low-pass or high-pass cutoffs.

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Inductor Color Code Calculator

Decode inductor markings into inductance values.

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Decibel to Voltage/Power Converter

Convert dB relationships into voltage and power ratios.

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Wheatstone Bridge Calculator

Solve bridge balance and unknown resistance values.

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Star-Delta Transformation Tool

Convert Y and delta resistor networks.

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Skin Depth Calculator

Estimate conductor skin depth at high frequency.

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Microstrip Impedance Calculator

Estimate controlled impedance for PCB traces.

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Battery Life Calculator

Estimate runtime from capacity and average current draw.

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Transformer Turns Ratio & Efficiency Calculator

Relate winding ratio, voltage, current, and losses.

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Zener Diode Voltage Regulator Designer

Size simple shunt regulator components.

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Series/Parallel Impedance Solver

Solve complex impedance networks.

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Via Current Capacity Calculator

Estimate current handling for plated vias.

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Differential Pair Impedance Tool

Size high-speed differential traces.

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Buck/Boost Converter Component Finder

Choose approximate switching-regulator components.

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Unit Converters

Convert mils, millimeters, copper ounces, and microns.

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Thermal Resistance/Heatsink Sizing Tool

Estimate junction temperature and heatsink requirements.