Resistor Color Code Calculator
Decode 4, 5, and 6-band resistor color codes into resistance, tolerance, and temperature coefficient.
Resistance–
Tolerance–
Range (min – max)–
Temp. coefficient–
Reading resistor color bands
A resistor's value is printed as colored bands. In a 4-band resistor the first two bands are significant digits, the third is a power-of-ten multiplier, and the fourth is the tolerance. 5-band (precision) resistors add a third significant digit; 6-band resistors add a temperature coefficient band.
R = (significant digits) × multiplier
Read the bands from the end where they're grouped closest together. The tolerance band (often gold or silver) is usually set slightly apart and read last.