{
  "id": "science-si-units",
  "name": "International System of Units (SI Units) Dataset",
  "category": "science",
  "source": null,
  "updated": "2026-01-05",
  "columns": [
    {
      "key": "name",
      "label": "Name",
      "type": "string"
    },
    {
      "key": "symbol",
      "label": "Symbol",
      "type": "string"
    },
    {
      "key": "quantity",
      "label": "Quantity",
      "type": "string"
    },
    {
      "key": "type",
      "label": "Type",
      "type": "string"
    },
    {
      "key": "definition",
      "label": "Definition",
      "type": "string"
    },
    {
      "key": "dimension",
      "label": "Dimension",
      "type": "string"
    }
  ],
  "rows": [
    {
      "name": "metre",
      "symbol": "m",
      "quantity": "length",
      "type": "Base Unit",
      "definition": "Distance light travels in 1/299,792,458 second",
      "dimension": "L"
    },
    {
      "name": "kilogram",
      "symbol": "kg",
      "quantity": "mass",
      "type": "Base Unit",
      "definition": "Defined by Planck constant h = 6.62607015×10⁻³⁴ J·s",
      "dimension": "M"
    },
    {
      "name": "second",
      "symbol": "s",
      "quantity": "time",
      "type": "Base Unit",
      "definition": "9,192,631,770 periods of cesium-133 radiation",
      "dimension": "T"
    },
    {
      "name": "ampere",
      "symbol": "A",
      "quantity": "electric current",
      "type": "Base Unit",
      "definition": "Defined by elementary charge e = 1.602176634×10⁻¹⁹ C",
      "dimension": "I"
    },
    {
      "name": "kelvin",
      "symbol": "K",
      "quantity": "thermodynamic temperature",
      "type": "Base Unit",
      "definition": "Defined by Boltzmann constant k = 1.380649×10⁻²³ J/K",
      "dimension": "Θ"
    },
    {
      "name": "mole",
      "symbol": "mol",
      "quantity": "amount of substance",
      "type": "Base Unit",
      "definition": "Exactly 6.02214076×10²³ elementary entities",
      "dimension": "N"
    },
    {
      "name": "candela",
      "symbol": "cd",
      "quantity": "luminous intensity",
      "type": "Base Unit",
      "definition": "Luminous efficacy Kcd = 683 lm/W at 540 THz",
      "dimension": "J"
    },
    {
      "name": "hertz",
      "symbol": "Hz",
      "quantity": "frequency",
      "type": "Derived Unit",
      "definition": "s⁻¹",
      "dimension": "T⁻¹"
    },
    {
      "name": "newton",
      "symbol": "N",
      "quantity": "force",
      "type": "Derived Unit",
      "definition": "kg·m·s⁻²",
      "dimension": "M·L·T⁻²"
    },
    {
      "name": "pascal",
      "symbol": "Pa",
      "quantity": "pressure, stress",
      "type": "Derived Unit",
      "definition": "N/m² = kg·m⁻¹·s⁻²",
      "dimension": "M·L⁻¹·T⁻²"
    },
    {
      "name": "joule",
      "symbol": "J",
      "quantity": "energy, work, heat",
      "type": "Derived Unit",
      "definition": "N·m = kg·m²·s⁻²",
      "dimension": "M·L²·T⁻²"
    },
    {
      "name": "watt",
      "symbol": "W",
      "quantity": "power, radiant flux",
      "type": "Derived Unit",
      "definition": "J/s = kg·m²·s⁻³",
      "dimension": "M·L²·T⁻³"
    },
    {
      "name": "coulomb",
      "symbol": "C",
      "quantity": "electric charge",
      "type": "Derived Unit",
      "definition": "A·s",
      "dimension": "T·I"
    },
    {
      "name": "volt",
      "symbol": "V",
      "quantity": "electric potential",
      "type": "Derived Unit",
      "definition": "W/A = kg·m²·s⁻³·A⁻¹",
      "dimension": "M·L²·T⁻³·I⁻¹"
    },
    {
      "name": "farad",
      "symbol": "F",
      "quantity": "capacitance",
      "type": "Derived Unit",
      "definition": "C/V = kg⁻¹·m⁻²·s⁴·A²",
      "dimension": "M⁻¹·L⁻²·T⁴·I²"
    },
    {
      "name": "ohm",
      "symbol": "Ω",
      "quantity": "electrical resistance",
      "type": "Derived Unit",
      "definition": "V/A = kg·m²·s⁻³·A⁻²",
      "dimension": "M·L²·T⁻³·I⁻²"
    },
    {
      "name": "siemens",
      "symbol": "S",
      "quantity": "electrical conductance",
      "type": "Derived Unit",
      "definition": "A/V = kg⁻¹·m⁻²·s³·A²",
      "dimension": "M⁻¹·L⁻²·T³·I²"
    },
    {
      "name": "weber",
      "symbol": "Wb",
      "quantity": "magnetic flux",
      "type": "Derived Unit",
      "definition": "V·s = kg·m²·s⁻²·A⁻¹",
      "dimension": "M·L²·T⁻²·I⁻¹"
    },
    {
      "name": "tesla",
      "symbol": "T",
      "quantity": "magnetic flux density",
      "type": "Derived Unit",
      "definition": "Wb/m² = kg·s⁻²·A⁻¹",
      "dimension": "M·T⁻²·I⁻¹"
    },
    {
      "name": "henry",
      "symbol": "H",
      "quantity": "inductance",
      "type": "Derived Unit",
      "definition": "Wb/A = kg·m²·s⁻²·A⁻²",
      "dimension": "M·L²·T⁻²·I⁻²"
    },
    {
      "name": "degree Celsius",
      "symbol": "°C",
      "quantity": "temperature",
      "type": "Derived Unit",
      "definition": "K - 273.15",
      "dimension": "Θ"
    },
    {
      "name": "lumen",
      "symbol": "lm",
      "quantity": "luminous flux",
      "type": "Derived Unit",
      "definition": "cd·sr",
      "dimension": "J"
    },
    {
      "name": "lux",
      "symbol": "lx",
      "quantity": "illuminance",
      "type": "Derived Unit",
      "definition": "lm/m² = cd·sr·m⁻²",
      "dimension": "J·L⁻²"
    },
    {
      "name": "becquerel",
      "symbol": "Bq",
      "quantity": "radioactivity",
      "type": "Derived Unit",
      "definition": "s⁻¹ (decays per second)",
      "dimension": "T⁻¹"
    },
    {
      "name": "gray",
      "symbol": "Gy",
      "quantity": "absorbed dose",
      "type": "Derived Unit",
      "definition": "J/kg = m²·s⁻²",
      "dimension": "L²·T⁻²"
    },
    {
      "name": "sievert",
      "symbol": "Sv",
      "quantity": "equivalent dose",
      "type": "Derived Unit",
      "definition": "J/kg = m²·s⁻²",
      "dimension": "L²·T⁻²"
    },
    {
      "name": "katal",
      "symbol": "kat",
      "quantity": "catalytic activity",
      "type": "Derived Unit",
      "definition": "mol·s⁻¹",
      "dimension": "N·T⁻¹"
    },
    {
      "name": "radian",
      "symbol": "rad",
      "quantity": "plane angle",
      "type": "Derived Unit",
      "definition": "m/m = 1 (dimensionless)",
      "dimension": "1"
    },
    {
      "name": "steradian",
      "symbol": "sr",
      "quantity": "solid angle",
      "type": "Derived Unit",
      "definition": "m²/m² = 1 (dimensionless)",
      "dimension": "1"
    },
    {
      "name": "quetta",
      "symbol": "Q",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10³⁰",
      "dimension": "-"
    },
    {
      "name": "ronna",
      "symbol": "R",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10²⁷",
      "dimension": "-"
    },
    {
      "name": "yotta",
      "symbol": "Y",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10²⁴",
      "dimension": "-"
    },
    {
      "name": "zetta",
      "symbol": "Z",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10²¹",
      "dimension": "-"
    },
    {
      "name": "exa",
      "symbol": "E",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10¹⁸",
      "dimension": "-"
    },
    {
      "name": "peta",
      "symbol": "P",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10¹⁵",
      "dimension": "-"
    },
    {
      "name": "tera",
      "symbol": "T",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10¹²",
      "dimension": "-"
    },
    {
      "name": "giga",
      "symbol": "G",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁹",
      "dimension": "-"
    },
    {
      "name": "mega",
      "symbol": "M",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁶",
      "dimension": "-"
    },
    {
      "name": "kilo",
      "symbol": "k",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10³",
      "dimension": "-"
    },
    {
      "name": "hecto",
      "symbol": "h",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10²",
      "dimension": "-"
    },
    {
      "name": "deca",
      "symbol": "da",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10¹",
      "dimension": "-"
    },
    {
      "name": "deci",
      "symbol": "d",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻¹",
      "dimension": "-"
    },
    {
      "name": "centi",
      "symbol": "c",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻²",
      "dimension": "-"
    },
    {
      "name": "milli",
      "symbol": "m",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻³",
      "dimension": "-"
    },
    {
      "name": "micro",
      "symbol": "μ",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻⁶",
      "dimension": "-"
    },
    {
      "name": "nano",
      "symbol": "n",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻⁹",
      "dimension": "-"
    },
    {
      "name": "pico",
      "symbol": "p",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻¹²",
      "dimension": "-"
    },
    {
      "name": "femto",
      "symbol": "f",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻¹⁵",
      "dimension": "-"
    },
    {
      "name": "atto",
      "symbol": "a",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻¹⁸",
      "dimension": "-"
    },
    {
      "name": "zepto",
      "symbol": "z",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻²¹",
      "dimension": "-"
    },
    {
      "name": "yocto",
      "symbol": "y",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻²⁴",
      "dimension": "-"
    },
    {
      "name": "ronto",
      "symbol": "r",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻²⁷",
      "dimension": "-"
    },
    {
      "name": "quecto",
      "symbol": "q",
      "quantity": "SI prefix",
      "type": "Prefix",
      "definition": "10⁻³⁰",
      "dimension": "-"
    }
  ],
  "meta": {
    "seo_title": "SI Units & Definitions - Free Download (Excel/CSV/PDF)",
    "seo_description": "Download 53 SI Units with definitions, symbols, and dimensions for free. Available in Excel, CSV, and PDF formats for science, education, and development.",
    "title": "International System of Units (SI Units) Dataset",
    "description": "This comprehensive dataset contains 53 fundamental and derived SI units, including their names, symbols, quantities, types, definitions, and dimensions. It's an essential resource for science, engineering, and education.",
    "key_takeaways": [
      "Access 53 comprehensive SI Units, including base and derived units.",
      "Explore precise definitions, symbols, quantities, and dimensions for each unit.",
      "Download unit data in flexible Excel, CSV, or printable PDF formats.",
      "Leverage accurate SI unit information for scientific research and educational materials."
    ],
    "keywords": [
      "si units list excel",
      "international system of units csv",
      "base derived units definitions",
      "metric system data download",
      "physical quantities dimensions",
      "science education resources"
    ],
    "use_cases": [
      "Import the **CSV** file into your SQL database or Python scripts to power scientific applications or unit conversion tools.",
      "Use the **Excel** file to create Pivot Tables, filter units by type, or generate custom reports for engineering projects and research.",
      "Print the **PDF** version for classroom reference, educational posters, or quick offline consultation during lab experiments.",
      "Reference this dataset to ensure accuracy and consistency in any project requiring precise measurement units and their fundamental definitions."
    ]
  },
  "record_count": 53,
  "title": "International System of Units (SI Units) Dataset"
}