{
  "entity_type": "unit_conversion_page",
  "id": "atm-to-pa",
  "name": "Atmospheres to Pascals",
  "title": "Atmospheres to Pascals Converter (atm to Pa)",
  "description": "Convert atmospheres to pascals: 1 atm = 101325 Pa. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "pressure",
  "quantity_name": "Pressure",
  "base_unit": "Pa",
  "from_unit": {
    "symbol": "atm",
    "display": "atm",
    "name": "atmospheres",
    "singular": "atmosphere"
  },
  "to_unit": {
    "symbol": "Pa",
    "display": "Pa",
    "name": "pascals",
    "singular": "pascal"
  },
  "linear": true,
  "factor": 101325,
  "inverse_factor": 0.000009869232667,
  "formula": "pascals = atmospheres × 101325",
  "reverse_formula": "atmospheres = pascals × 0.000009869232667",
  "unit_relation": "1 atm = 101325 Pa",
  "examples": [
    {
      "value": 5,
      "result": 506625,
      "text": "5 atm = 506625 Pa"
    },
    {
      "value": 12.5,
      "result": 1266560,
      "text": "12.5 atm = 1266560 Pa"
    },
    {
      "value": 100,
      "result": 10132500,
      "text": "100 atm = 10132500 Pa"
    }
  ],
  "table": [
    {
      "atm": 1,
      "Pa": 101325
    },
    {
      "atm": 2,
      "Pa": 202650
    },
    {
      "atm": 3,
      "Pa": 303975
    },
    {
      "atm": 4,
      "Pa": 405300
    },
    {
      "atm": 5,
      "Pa": 506625
    },
    {
      "atm": 6,
      "Pa": 607950
    },
    {
      "atm": 7,
      "Pa": 709275
    },
    {
      "atm": 8,
      "Pa": 810600
    },
    {
      "atm": 9,
      "Pa": 911925
    },
    {
      "atm": 10,
      "Pa": 1013250
    },
    {
      "atm": 15,
      "Pa": 1519880
    },
    {
      "atm": 20,
      "Pa": 2026500
    },
    {
      "atm": 25,
      "Pa": 2533130
    },
    {
      "atm": 30,
      "Pa": 3039750
    },
    {
      "atm": 40,
      "Pa": 4053000
    },
    {
      "atm": 50,
      "Pa": 5066250
    },
    {
      "atm": 75,
      "Pa": 7599380
    },
    {
      "atm": 100,
      "Pa": 10132500
    },
    {
      "atm": 200,
      "Pa": 20265000
    },
    {
      "atm": 250,
      "Pa": 25331300
    },
    {
      "atm": 500,
      "Pa": 50662500
    },
    {
      "atm": 1000,
      "Pa": 101325000
    }
  ],
  "faq": [
    {
      "q": "How many pascals are in one atmosphere?",
      "a": "1 atm = 101325 Pa. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures."
    },
    {
      "q": "What is the formula to convert atmospheres to pascals?",
      "a": "Multiply the value in atmospheres by 101325: pascals = atmospheres × 101325. For example, 5 atm = 506625 Pa."
    },
    {
      "q": "How do I convert pascals back to atmospheres?",
      "a": "Multiply by the inverse factor 0.000009869232667 (atmospheres = pascals × 0.000009869232667), or use the pascals-to-atmospheres page."
    }
  ],
  "sources": [
    {
      "name": "NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors",
      "url": "https://www.nist.gov/pml/special-publication-811",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "BIPM – The International System of Units (SI Brochure, 9th edition)",
      "url": "https://www.bipm.org/en/publications/si-brochure",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "Wikipedia – Conversion of units",
      "url": "https://en.wikipedia.org/wiki/Conversion_of_units",
      "type": "reference",
      "retrieved_at": "2026-09-24"
    }
  ],
  "freshness": {
    "type": "static",
    "max_age_seconds": null,
    "note": "Fixed conversion factors (NIST/BIPM definitions); results never go stale."
  },
  "api": {
    "convert": "https://tttkmbb.com/api/v1/convert?value=5&from_unit=atm&to_unit=Pa",
    "calculator": "https://tttkmbb.com/api/v1/calculate/pressure?value=5&from_unit=atm&to_unit=Pa",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "atm",
      "to_unit": "Pa"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/atm-to-pa",
    "markdown": "https://tttkmbb.com/conversion/atm-to-pa.md",
    "json": "https://tttkmbb.com/conversion/atm-to-pa.json",
    "reverse": "https://tttkmbb.com/conversion/pa-to-atm",
    "quantity_converter": "https://tttkmbb.com/conversion/pressure",
    "units": "https://tttkmbb.com/api/v1/units?quantity=pressure"
  },
  "timestamp": "2026-09-24"
}