Resistor color code calculator — 4, 5 & 6 band
Interactive engineering and procurement calculator. Instant client-side computation with no sign-up.
Choose the color of each band from left to right.
Decoded value
Resistance
2 digits × multiplier
Tolerance
A blank 4th band would mean ±20%
Nearest E24 value
E24 preferred value
About the model
IEC 60062 bands: the first two (or three) rings are significant digits, the next ring is the decimal multiplier (×10ⁿ, with gold = ×0.1 and silver = ×0.01), and the last ring is the tolerance (±1% brown, ±2% red, ±5% gold, ±10% silver). A 6th ring adds the temperature coefficient in ppm/K. So brown-black-red-gold reads 1 0 ×100 = 1 kΩ at ±5%.
Working backwards, a target like 47 kΩ maps to yellow-violet-orange = 4 7 ×1000. Precision parts (under ±5%) use a third digit, e.g. brown-black-black-red-brown for a 10 kΩ ±1%. The nearest standard value is looked up in the E24 series (10, 11, 12 … 91 per decade), which is what most through-hole resistors are manufactured to.
Looking for parts: resistors · resistor kits · through-hole resistors. The color code applies to through-hole resistors; surface-mount (SMD) parts use a numeric marking instead.
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