Enter a value and see 4-band, 5-band and SMT simultaneously
A resistor color code is a method of indicating the resistance value of a resistor using colored bands. Each color represents a digit, multiplier, or tolerance. A 4-band resistor typically uses two digits, a multiplier, and a tolerance band. A 5-band resistor uses three digits, a multiplier, and a tolerance band, which allows for a more precise resistance value.
SMT (Surface-Mount Technology) resistors use a numerical code instead of color bands. This code is printed directly on the resistor body and indicates its resistance value in ohms. For example, "472" represents 4.7 kΩ (47 × 100).
Knowing how to read resistor codes is essential for electronics design and troubleshooting. Use this calculator to quickly decode resistor values for both through-hole and SMT resistors.