<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Resistor-Color-Code-Calculator.aspx.cs" Inherits="ResistorDefault" %> Resistor Color Code Calculator - Robot Room

Select a color coding from each band table and press Calculate.

(First Band
Black (0) Brown (10) Red (20) Orange (30) Yellow (40) Green (50) Blue (60) Violet (70) Gray (80) White (90)
+ Second Band)
Black (0) Brown (1) Red (2) Orange (3) Yellow (4) Green (5) Blue (6) Violet (7) Gray (8) White (9)
× Third Band=
Silver (0.01) Gold (0.1) Black (1) Brown (10) Red (100) Orange (1 k) Yellow (10 k) Green (100 k) Blue (1 M) Violet (10 M)

Or, type a value and press enter:

Ω (ohms)


Always use a multimeter to measure the actual resistance before inserting a part into a circuit.
Want to see a cool Lego multimeter that displays resistor colors and values?