Resistor Color Code Calculator (4 & 5 Band)

Pick the band colors and read the resistance value instantly, supports 4-band and 5-band resistors.

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How it works

Each color is a digit (black=0 … white=9). The multiplier band shifts the decimal point; the tolerance band (gold/silver) states accuracy. Value = digits × multiplier ± tolerance.

Color code reference

ColorDigitMultiplierTolerance
Black0×1—
Brown1×10±1%
Red2×100±2%
Orange3×1k—
Yellow4×10k—
Green5×100k±0.5%
Blue6×1M±0.25%
Violet7×10M±0.1%
Gray8—±0.05%
White9——
Gold—×0.1±5%
Silver—×0.01±10%

Frequently Asked Questions

How do I read a 5-band resistor?

Bands 1–3 are digits, band 4 is the multiplier and band 5 is the tolerance. For 4-band resistors, bands 1–2 are digits, band 3 is the multiplier and band 4 is tolerance.

Which band comes first?

The tolerance band (gold or silver) sits at the far end, hold the resistor with it on the right and read the bands from the left.

What does tolerance mean?

The guaranteed accuracy of the stated value: a 1 kΩ resistor with 5% tolerance measures between 950 Ω and 1050 Ω.

Related Tools

Color Code to NameRGB to HEXHEX to RGBCMYK to RGB