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Resistor color code calculator

Read a 4- or 5-band resistor: pick the colors to get the resistance, tolerance and range.

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Results

Resistance 4.7 kΩ

How it works

digits × multiplier ± tolerance

Hold the resistor with the gold or silver tolerance band on the right. The first two bands (three on precision 5-band resistors) are digits from black = 0 to white = 9, the next band is the multiplier (the number of zeros, or ×0.1 for gold and ×0.01 for silver), and the last is the tolerance. Yellow-violet-red-gold is 47 × 100 = 4,700 Ω (4.7 kΩ) ± 5%.

  1. Digits 4 · Yellow · 7 · Violet → 47
  2. Times the multiplier 47 × 100 = 4,700 Ω
  3. Tolerance range 4,700 Ω ± 5% → 4,465 Ω … 4,935 Ω

Printed from rocketcalc.io/tech/resistor-color-code