Resistor Color Code Calculator

Formula and Units

A 4-band resistor uses two digit bands, one multiplier band, and one tolerance band.

Formula: resistance = two-digit number x multiplier.

Understanding Resistor Color Codes

1. What This Calculator Measures

A 4-band resistor uses colors to encode two significant digits, a multiplier, and tolerance.

2. How the Calculation Works

The calculator turns the first two color bands into a two-digit number, multiplies by the third band, and applies the tolerance range.

3. Formula or Rule Used

resistance = two-digit number x multiplier.

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