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A growing collection of practical electronics calculators and utilities.
This page is a hub for electronics tools I build to speed up circuit design and troubleshooting. Each tool focuses on a specific task, and new tools will be added over time.
Use the resistor calculator and Ohm's Law quick solver below, then check back as more tools are added.
Decode 3 to 6 band resistors with tolerance and TCR support.
On this pageCalculate V, I, R, and P instantly with an interactive formula wheel.
On this pageQuickly find resistor pairs for target output voltages.
Status: Coming soonClick on a band to change its color.
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Tip: Use decimal values for fractions (0.25). Provide exactly two values for best results.