{
  "entity_type": "unit_conversion_page",
  "id": "bar-to-psi",
  "name": "Bar to Psi",
  "title": "Bar to Psi Converter (bar to psi)",
  "description": "Convert bar to psi: 1 bar = 14.5038 psi. 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": "bar",
    "display": "bar",
    "name": "bar",
    "singular": "bar"
  },
  "to_unit": {
    "symbol": "psi",
    "display": "psi",
    "name": "psi",
    "singular": "psi"
  },
  "linear": true,
  "factor": 14.50377377,
  "inverse_factor": 0.06894757293,
  "formula": "psi = bar × 14.50377377",
  "reverse_formula": "bar = psi × 0.06894757293",
  "unit_relation": "1 bar = 14.5038 psi",
  "examples": [
    {
      "value": 5,
      "result": 72.5189,
      "text": "5 bar = 72.5189 psi"
    },
    {
      "value": 12.5,
      "result": 181.297,
      "text": "12.5 bar = 181.297 psi"
    },
    {
      "value": 100,
      "result": 1450.38,
      "text": "100 bar = 1450.38 psi"
    }
  ],
  "table": [
    {
      "bar": 1,
      "psi": 14.5038
    },
    {
      "bar": 2,
      "psi": 29.0075
    },
    {
      "bar": 3,
      "psi": 43.5113
    },
    {
      "bar": 4,
      "psi": 58.0151
    },
    {
      "bar": 5,
      "psi": 72.5189
    },
    {
      "bar": 6,
      "psi": 87.0226
    },
    {
      "bar": 7,
      "psi": 101.526
    },
    {
      "bar": 8,
      "psi": 116.03
    },
    {
      "bar": 9,
      "psi": 130.534
    },
    {
      "bar": 10,
      "psi": 145.038
    },
    {
      "bar": 15,
      "psi": 217.557
    },
    {
      "bar": 20,
      "psi": 290.075
    },
    {
      "bar": 25,
      "psi": 362.594
    },
    {
      "bar": 30,
      "psi": 435.113
    },
    {
      "bar": 40,
      "psi": 580.151
    },
    {
      "bar": 50,
      "psi": 725.189
    },
    {
      "bar": 75,
      "psi": 1087.78
    },
    {
      "bar": 100,
      "psi": 1450.38
    },
    {
      "bar": 200,
      "psi": 2900.75
    },
    {
      "bar": 250,
      "psi": 3625.94
    },
    {
      "bar": 500,
      "psi": 7251.89
    },
    {
      "bar": 1000,
      "psi": 14503.8
    }
  ],
  "faq": [
    {
      "q": "How many psi are in one bar?",
      "a": "1 bar = 14.5038 psi. 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 bar to psi?",
      "a": "Multiply the value in bar by 14.50377377: psi = bar × 14.50377377. For example, 5 bar = 72.5189 psi."
    },
    {
      "q": "How do I convert psi back to bar?",
      "a": "Multiply by the inverse factor 0.06894757293 (bar = psi × 0.06894757293), or use the psi-to-bar 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=bar&to_unit=psi",
    "calculator": "https://tttkmbb.com/api/v1/calculate/pressure?value=5&from_unit=bar&to_unit=psi",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "bar",
      "to_unit": "psi"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/bar-to-psi",
    "markdown": "https://tttkmbb.com/conversion/bar-to-psi.md",
    "json": "https://tttkmbb.com/conversion/bar-to-psi.json",
    "reverse": "https://tttkmbb.com/conversion/psi-to-bar",
    "quantity_converter": "https://tttkmbb.com/conversion/pressure",
    "units": "https://tttkmbb.com/api/v1/units?quantity=pressure"
  },
  "timestamp": "2026-09-24"
}