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Resistor Color Code Calculator

Resistor Color Code Calculator

Resistor Color Code Calculator

Determine the resistance value and tolerance of a 4‑band resistor.

* Select colors for each band.

Step 1: Select Color Bands

Formulas:

Resistance: $$R = \left(10 \times \text{Band1} + \text{Band2}\right) \times \text{Multiplier}$$
Tolerance: Provided by the tolerance band.

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