The most common values are 5% (designated by a gold band), and 10% (designated by a silver band). So the total value of the resistance given by the colors is 10 x 10 2 Ω = 1000 Ω = 1kΩ.īand Four – Tolerance: Gives the value of the tolerance for the resistor. In this case, the third band is red which corresponds to the number 2. The actual multiplier is 10 n, where n is the value of the band color. Therefore the digits from band one and band two are: 10.īand Three – Multiplier: Takes the digits and multiplies them by a value given by this band. This is added to the right of the first digit (from band one). This band is black, which corresponds to the value 0. The first band is brown, which corresponds to the value 1.īand Two – 2nd Digit: The second digit of the resistance value. Resistor color codes always have digits, followed by a multiplier, follower by a tolerance value.įor a four band resistor, each band has a specific role:īand One – 1st Digit: This is the first digit of the resistance value. 1K Resistor Color Chart Band Number Function Color Value 1 1st Digit Brown 1 2 2nd Digit Black 0 3 Multiplier Red x 100 4 Tolerance Gold (or silver) ± 5% Total Value:ġ000 ± 5% Ω How To Read the 1K Resistor Color Code This band is almost always gold or silver, so it is usually easy to identify.Ģ) Look for the gap between the 3rd and 4th band.

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Visit the Tables page to view reference tables such as Maximum Ampacity for Current-Carrying Conductors. To calculate wire ampacity for a circuit, use the Wire Ampacity Calculator or the Advanced Wire Ampacity Calculator.įor long conductor runs where voltage drop may be an issue, use the Voltage Drop Calculator to determine proper conductor sizing and maximumĬircuit length. To calculate wire size for a circuit, use the Wire Size Calculator or the Advanced Wire Size Calculator. Produces a resistance value of 123 * 100 = 12.3 kΩ with a ± 5% tolerance. Band 4: Multiplier (determines order of magnitude)įor example, a resistor with a color band pattern of brown, red, orange, red, gold yields the first digit as 1, the second digit as 2, the third digit as 3, and a multiplier of 10,000.Band 3: Third significant figure (additional digit of precision).Band 1: First significant figure (left-most digit).Resistance values can be calculated from a 5-band resistor color code as follows: Note: Tolerance values in % of full resistance range.