Resistor Color Code Calculator

Resistors play a vital role in all electronic circuits, controlling current flow and protecting delicate components. Decoding their colored bands—each representing digits, multipliers, tolerances, or temperature coefficients—has traditionally required printed charts or memorization. This process can be slow and error-prone.

Our calculator turns decoding into a streamlined digital experience. Select your resistor type (4, 5, or 6 bands), choose the colors, and click Calculate. Instantly get precise values in Ω, kΩ, or MΩ, along with tolerance percentage and temperature coefficient when applicable.

Whether you’re teaching students, prototyping a design, or repairing circuits in the field, this tool simplifies your workflow. Built for accuracy and speed, it works seamlessly on desktop, tablet, and mobile devices.

Key Benefits:

• Fast & Accurate: Live color indicators and instant calculation.
• Error Prevention: Intuitive interface eliminates misreads.
• Versatile: Supports precision resistors with tight tolerances and ppm ratings.
• Accessible: Responsive design and ARIA live regions for screen readers.

Get started now by choosing your band configuration and colors below.