FREE TOOLS // CALCULATORS
RESOURCES
Free interactive engineering tools, calculators, and compliance references for electronics professionals.
PCB Design Tools
Interactive calculators for PCB trace sizing, impedance, via capacity, and board layout.
Trace Width Calculator
Calculate minimum PCB trace width using IPC-2221 standards. Input current, copper weight, and temperature rise.
Via Current Capacity Calculator
Determine maximum current capacity for PCB vias based on diameter, plating thickness, and temperature rise.
Impedance Calculator
Calculate characteristic impedance for microstrip, stripline, CPWG, and differential pair transmission lines.
Panelization Calculator
Calculate optimal PCB panel layout for manufacturing. Maximize board count and material utilization with V-score or tab routing options.
Annular Ring Calculator
Calculate annular ring width from pad and drill sizes, or find the required drill size for a target annular ring. Includes IPC-6012 class requirements.
General EE Utilities
Everyday engineering calculators — Ohm's law, unit conversion, resistor color codes, and more.
Voltage Divider Calculator
Calculate output voltage for resistive voltage dividers with standard resistor value suggestions.
Ohm's Law / Power Calculator
Calculate voltage, current, resistance, and power using Ohm's law. Enter any two values to solve for the rest instantly.
Unit Converter
Convert between common electronics engineering units — mil/mm, AWG/mm², °C/°F, and copper weight to thickness.
Resistor Color Code Decoder
Decode 4-band and 5-band resistor color codes instantly. Click color bands or enter a value to see the matching color pattern.
LED Resistor Calculator
Calculate the current limiting resistor for LEDs. Enter supply voltage, LED forward voltage, and desired current to find the right resistor value.
RC / LC Filter Calculator
Calculate cutoff frequency, impedance, and Q factor for RC and LC low-pass and high-pass filters. Includes Bode plot visualization.
dBm / Watts / Volts Converter
Convert between dBm, watts, and volts (RMS) for any impedance. Essential for RF, telecom, and signal-level work.
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