SMD resistor codes
Formulas, limitations and content checked according to our Editorial method.
Enter the marking printed on a resistor to obtain its value in ohms, kΩ or MΩ and the decoding rule.
Calculate
Value
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Rule
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Format
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Worked example
103 means 10 × 10³ = 10 kΩ; 4R7 means 4.7 Ω; EIA-96 code 01C corresponds to 10 kΩ.
Calculation limits
Proprietary markings, zero-ohm links, tolerances and special codes may differ. Always verify the component documentation or bill of materials.
Frequently asked questions
What does the letter R mean?
R replaces the decimal point: 4R7 means 4.7 Ω and R22 means 0.22 Ω.