Resistor Code Calculator

Resistor Color Code Calculator is your essential pocket toolkit for decoding components and solving electronics calculations in seconds. Designed for students, hobbyists, and professionals, this app transforms complex component identification and circuit math into instant, accurate results.

Identify resistor values effortlessly with support for 3-band, 4-band, 5-band, and 6-band color-coded resistors. Simply select the colors you see, and get the resistance value instantly. Need the reverse? Enter any resistance value and discover the exact color code you need to build or verify your circuit. This bidirectional calculation saves time during component sourcing and circuit assembly.

Decode SMD components with confidence using the dedicated SMD resistor and capacitor decoder. Whether you're working with 3-digit or 4-digit SMD formats, the app quickly identifies component values from printed codes. The integrated EIA-198 capacitor code decoder features a specialized input grid for seamless identification, while EIA-96 resistor codes with 1% precision support advanced engineering work.

Solve Ohm's Law problems instantly by entering any two known values—Voltage, Current, Resistance, or Power—and let the calculator determine the rest automatically. Automatic unit conversions handle millivolts, kiloohms, megawatts, and beyond, eliminating manual conversion errors and speeding up your workflow.

Calculate equivalent resistance for series and parallel circuit configurations with dynamic visual schematics that update in real time. Switch seamlessly between modes to explore how component arrangements affect total resistance, making circuit design and troubleshooting intuitive and educational.

Every feature prioritizes accuracy and speed. The clean, modern interface includes intuitive color-coded keypads that prevent input mistakes, while the lightweight design ensures fast performance whether you're in the lab or the field. Works completely offline, so you have access to all tools whenever you need them, without relying on internet connectivity.

Resistor Code Calculator makes electronics math and component decoding faster, more reliable, and genuinely enjoyable—whether you're designing circuits, learning electronics fundamentals, or troubleshooting existing builds.