Resistor Colour Code Calculator

Select Band Count:

1st Band of Colour: 2nd Band of Colour: Multiplier: Tolerance:

1st Band of Colour: 2nd Band of Colour: 3rd Band of Colour: Multiplier: Tolerance:

1st Band of Colour: 2nd Band of Colour: 3rd Band of Colour: Multiplier: Tolerance: PPM:

Resistor

A Resistor is a passive electrical component that resists the flow of electric current, resulting in a drop in voltage. It is a fundamental component used in various electrical and electronic circuits to control current and voltage levels.
Resistors are characterised by their resistance value, which is measured in ohms (Ω).

Resistor Colour Code

The Resistor Colour Code is a method of indicating the value of a resistor using coloured bands. Each colour represents a specific digit, multiplier, or tolerance. This code allows for quick identification and calculation of a resistor’s value without the need for additional measuring equipment.

The International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE) provide global standards for resistor colour coding. These standards ensure uniformity in the identification and calculation of resistor values worldwide.
In India, the BIS (Bureau of Indian Standards) outlines the specific standards for resistor colour codes in its guidelines. These standards align with international practices while ensuring that components meet the requirements of the Indian market.

Resistor Colour Code Calculator

This Resistor Colour Code Calculator is designed to simplify the process of determining the resistance value of a resistor. By selecting the appropriate colour bands, users can quickly and accurately calculate the resistor’s value in ohms (Ω). This calculator supports 4-band, 5-band, and 6-band resistors, making it a versatile and essential tool for electronics enthusiasts, students, and professionals.

Usage Instructions

Select the Band Type: Choose between 4-band, 5-band, or 6-band resistor types based on your resistor.
Input Colour Bands: Select the colours of the bands on your resistor from the dropdown menus. The colours correspond to specific digits, multipliers, and tolerance values.
Calculate: Click the “Calculate” button to display the resistance value.
View Results: The calculated resistor value will be displayed in ohms (Ω), along with the tolerance if applicable.

Applications of Resistor Colour Code

Educational Purposes: Ideal for teaching and learning about resistors and their values in physics and electronics classes.Circuit Design: Helps engineers and hobbyists to quickly determine the required resistors for their electronic circuits.Troubleshooting: Assists technicians in identifying resistor values during the maintenance and repair of electronic devices.

Formula for Resistor Colour Code Calculators

For a 4-band Resistor: Resistance Value = (AB x 10^C) ± Tolerance

For a 5-band Resistor: Resistance Value = (ABC x 10^D) ± Tolerance

For a 6-band Resistor: Resistance Value = (ABC x 10^D) ± Tolerance
Temperature Coefficient = PPM