Resistor Color Code Calculator
Decode 4-band resistor color codes into Ohms with tolerance range.
Resistor Color Code Decoder (4-Band)
Range: 950 Ω – 1.05 kΩ
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Resistor Color Code Decoding Mathematics
Resistor color code calculator decodes 4-band resistor color bands into Ohms with tolerance range.
The first two color bands each represent a digit (0-9); the third band is a power-of-10 multiplier applied to those two digits combined. The fourth band indicates the tolerance (± percentage) of the stated value.
- 1Select the color of each of the 4 resistor bands.
- 2View the decoded resistance in Ohms, tolerance, and min/max value range.
A resistor has bands: Brown (1), Black (0), Red (×100), Gold (±5%).
Frequently Asked Questions (FAQ)
As a multiplier (3rd band), gold means ×0.1 and silver means ×0.01 — used for resistors under 10 Ω.
A 5-band resistor uses three significant-digit bands instead of two (for higher precision), followed by a multiplier and tolerance band — common on precision resistors with tighter tolerances like ±1%.
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