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Resistance Value Calculator

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Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate resistance values of 4-band color coded resistors.

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Resistor color band calculator

Resistor Color Codification

A 4-band resistor has two significant digit bands, one multiplier band and a optional fourth band for tolerance from left to right. To distinguish left from right there is a gap between the third and fourth color bands. The full color code chart can be found here.

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