1k ohm resistor color code

How to read it

Brown is 1, black is 0 and red is the multiplier ×100, so the value is 10 × 100 = 1,000 Ω, written 1 kΩ or 1K. The University of California, Berkeley lab appendix gives brown, black, red as 10 × 10² = 1 kΩ, and the University of Texas at Dallas lab manual codes the 1K resistors in its parts kit brown-black-red. The University of Colorado Colorado Springs physics prelab names 1 kΩ among the most commonly used values, with 10 kΩ and 100 kΩ.

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On a five-band resistor

With three digit bands the value is brown, black, black, brown: 100 × 10. The fifth band is the tolerance.

On a chip resistor

A 1 kΩ surface mount resistor is printed 102, or 1001 with four digits on 1% parts, in Vishay’s chip marking table. The EIA-96 code on a 1% 0603 chip is 01B. See SMD resistor codes.

Look-alikes

With an orange third band instead of red the value is 10 kΩ; with brown, 100 Ω, the University of Texas at Dallas lab manual’s first example.