SMD resistor code

How the calculation works

Decode a common three- or four-digit SMD resistor marking. The tool converts the form units and presents the result using readable engineering notation.

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Example

Code 472 means 4.7 kΩ; code 1001 means 1 kΩ.

How to interpret the result

• Common three- and four-digit codes do not cover every marking system.
• The letter R often replaces the decimal separator.
• EIA-96 needs a separate lookup table and is outside this simple decoder.

Limitations and safe use

The result uses a simplified model. Check tolerance, temperature, absolute ratings and the component datasheet.