Resistor Color Code
Interactive simulation ā adjust parameters and watch the visualization update in real time.
Interactive bands
Leads (silver) ā tan body ā four bands
How it works
Four-band resistors encode two significant digits, a decimal multiplier, and tolerance. Click each band to cycle colors, or enter a target resistance (supports k/M/G suffixes) to snap the bands to the nearest valid 4-band code.
Key equations
R = (10Ā·dā + dā) Ć 10^m Ā (m from multiplier color)