Decode 4-band resistor color codes to identify resistance values and tolerances instantly. A must-have utility for electronics hobbyists and technicians working with through-hole components.
Start reading from the end that has bands closer together. The tolerance band (often Gold or Silver) is usually separated by a larger gap and is read last.
Tolerance indicates how much the actual resistance might vary from the marked value. For example, a 100Ω resistor with 5% tolerance could measure between 95Ω and 105Ω.
Gold/Silver are tolerance.