Electronics & Electrical Tools
A suite of tools for your electronics projects and calculations.
Ohm's Law Calculator
Calculate V, I, or R based on Ohm's Law.
Resistor Color Code Calculator
Find a resistor's value by its color bands.
Simple LED Resistor Calculator
Find the right resistor for your LED.
Battery Life Calculator
Estimate how long a battery will last.
Battery Capacity Calculator
Determine battery capacity based on load and runtime.
Voltage Converter
Convert units of voltage.
Current Converter
Convert units of electrical current.
Frequency Converter
Convert units of frequency.
Charge Converter
Convert units of electrical charge.
Power Dissipation Calculator
Calculate power dissipation in resistor circuits.
RF Power Converter
Convert RF power between watts and decibels.
Thermal Resistance Calculator
Calculate thermal resistance for heat transfer.
Zener Diode Regulator Calculator
Calculate values for Zener diode circuits.
LM317 Resistor / Voltage Calculator
Calculate resistor/voltage for an LM317.
DC-DC Circuit Calculator
Calculate values for a DC-DC buck converter.
Power Supply Calculator
Estimate the wattage needed for your PC build.
Electric Load Calculator
Estimate your electrical load and consumption.
Power Calculator
Calculate power, voltage, current, or resistance.