{
  "id": "smd-resistor-code",
  "slug": "smd-resistor-code-calculator",
  "url": "https://electronics.tools/tools/smd-resistor-code-calculator/",
  "name": "SMD Resistor Code Calculator",
  "group": "resistors",
  "summary": "EIA-3 103 is 10 kΩ (typically ±5 %).",
  "formulas": [
    {
      "id": "eia3",
      "label": "3-digit EIA",
      "plain": "R = (d1 d2) × 10^m",
      "mathml": "<math display=\"block\" xmlns=\"http://www.w3.org/1998/Math/MathML\" aria-label=\"R = (d1 d2) × 10^m\"><mrow><mi>R</mi><mo>=</mo><mrow><mo>(</mo><mrow><msub><mi>d</mi><mn>1</mn></msub><msub><mi>d</mi><mn>2</mn></msub></mrow><mo>)</mo></mrow><mo>×</mo><msup><mn>10</mn><mi>m</mi></msup></mrow></math>",
      "symbols": [
        "R"
      ],
      "sources": [
        "iec60062"
      ]
    },
    {
      "id": "eia96",
      "label": "EIA-96",
      "plain": "R = round(100 · 10^((i−1)/96)) × letter multiplier",
      "mathml": "<math display=\"block\" xmlns=\"http://www.w3.org/1998/Math/MathML\" aria-label=\"R = round(100 · 10^((i−1)/96)) × letter multiplier\"><mrow><mi>R</mi><mo>=</mo><mtext>round</mtext><mrow><mo>(</mo><mrow><mn>100</mn><mo>×</mo><msup><mn>10</mn><mrow><mrow><mo>(</mo><mrow><mi>i</mi><mo>-</mo><mn>1</mn></mrow><mo>)</mo></mrow><mo>/</mo><mn>96</mn></mrow></msup></mrow><mo>)</mo></mrow><mo>×</mo><mi>m</mi></mrow></math>",
      "symbols": [
        "R"
      ],
      "sources": [
        "iec60062"
      ]
    }
  ],
  "variables": [
    {
      "symbol": "code",
      "name": "Marking",
      "unit": "1",
      "role": "input",
      "precision": {
        "sig": 4
      },
      "default": "103",
      "urlParam": "code"
    },
    {
      "symbol": "R",
      "name": "Resistance (primary)",
      "unit": "Ω",
      "role": "output",
      "precision": {
        "sig": 4
      }
    },
    {
      "symbol": "kind",
      "name": "Primary encoding",
      "unit": "1",
      "role": "output",
      "precision": {
        "sig": 1
      }
    }
  ],
  "examples": [
    {
      "id": "103",
      "title": "EIA-3 103",
      "input": [
        {
          "symbol": "code",
          "value": "103",
          "unit": "1",
          "display": "103"
        }
      ],
      "output": [
        {
          "symbol": "R",
          "value": 10000,
          "unit": "Ω",
          "display": "10 kΩ"
        },
        {
          "symbol": "kind",
          "value": "eia-3",
          "unit": "1",
          "display": "eia-3"
        }
      ],
      "computedBy": "smdResistorCode"
    },
    {
      "id": "10R",
      "title": "10R is both EIA-96 and R-notation",
      "input": [
        {
          "symbol": "code",
          "value": "10R",
          "unit": "1",
          "display": "10R"
        }
      ],
      "output": [
        {
          "symbol": "R",
          "value": 1.24,
          "unit": "Ω",
          "display": "1.24 Ω"
        },
        {
          "symbol": "kind",
          "value": "eia-96",
          "unit": "1",
          "display": "eia-96"
        }
      ],
      "computedBy": "smdResistorCode"
    },
    {
      "id": "4R7",
      "title": "R-notation 4R7",
      "input": [
        {
          "symbol": "code",
          "value": "4R7",
          "unit": "1",
          "display": "4R7"
        }
      ],
      "output": [
        {
          "symbol": "R",
          "value": 4.7,
          "unit": "Ω",
          "display": "4.7 Ω"
        }
      ],
      "computedBy": "smdResistorCode"
    },
    {
      "id": "01C",
      "title": "EIA-96 01C",
      "input": [
        {
          "symbol": "code",
          "value": "01C",
          "unit": "1",
          "display": "01C"
        }
      ],
      "output": [
        {
          "symbol": "R",
          "value": 10000,
          "unit": "Ω",
          "display": "10 kΩ"
        }
      ],
      "computedBy": "smdResistorCode"
    }
  ],
  "sources": [
    {
      "title": "IEC 60062 marking codes for resistors and capacitors",
      "url": "https://webstore.iec.ch/publication/2383",
      "retrieved": "2026-11-02",
      "standard": "IEC 60062"
    }
  ],
  "datePublished": "2026-11-02T00:00:00+08:00",
  "dateModified": "2026-11-02T00:00:00+08:00",
  "author": {
    "name": "Jasper",
    "url": "https://electronics.tools/about/#jasper"
  },
  "relatedTools": [
    "https://electronics.tools/tools/color-code-decoder/",
    "https://electronics.tools/tools/led-resistor-calculator/"
  ]
}