🌈 Resistor Color Code Calculator

Calculate 4-band resistor values from color codes with a visual resistor graphic.

Band 1 (1st digit)

Band 2 (2nd digit)

Band 3 (Multiplier)

Band 4 (Tolerance)

0 Ω ±5%

Resistor Color Code Guide

4-band resistors use color-coded bands: first two = digits, third = multiplier, fourth = tolerance.

Color code chart

Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Gray=8, White=9.