{
  "slug": "corrected-sodium",
  "title": "Corrected Sodium Calculator",
  "heading": "Corrected Sodium Calculator",
  "category": "fitness-health",
  "url": "https://www.revenuelab.fyi/toolbox/corrected-sodium",
  "summary": "Adjust measured sodium for hyperglycemia, plus free water deficit.",
  "description": "High glucose pulls water intravascularly and dilutes measured sodium. This corrects for it using both the classic and Hillier factors, and estimates the free water deficit.",
  "formula": "Corrected Na = measured Na + factor × (glucose − 100) ÷ 100.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=corrected-sodium",
  "inputs": [
    {
      "id": "na",
      "label": "Measured sodium",
      "kind": "number",
      "hint": null,
      "default": 128,
      "unit": "mEq/L",
      "min": 90,
      "max": null
    },
    {
      "id": "glucose",
      "label": "Serum glucose",
      "kind": "number",
      "hint": null,
      "default": 600,
      "unit": "mg/dL",
      "min": 50,
      "max": null
    },
    {
      "id": "kg",
      "label": "Body weight",
      "kind": "number",
      "hint": null,
      "default": 70,
      "unit": "kg",
      "min": 5,
      "max": null
    },
    {
      "id": "sex",
      "label": "Sex",
      "kind": "select",
      "hint": null,
      "default": "male",
      "options": [
        {
          "value": "male",
          "label": "Male"
        },
        {
          "value": "female",
          "label": "Female"
        }
      ]
    }
  ],
  "outputs": [
    {
      "id": "classic",
      "label": "Corrected Na (1.6 factor)",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "hillier",
      "label": "Corrected Na (2.4 factor)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "deficit",
      "label": "Free water deficit (L)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "tbw",
      "label": "Total body water (L)",
      "format": "decimal",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Measured sodium: 128 mEq/L",
      "Serum glucose: 600 mg/dL",
      "Body weight: 70 kg",
      "Sex: Male"
    ],
    "outputs": [
      "Corrected Na (1.6 factor): 136",
      "Corrected Na (2.4 factor): 140",
      "Free water deficit (L): 0",
      "Total body water (L): 42"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter measured sodium (mEq/L).",
      "Enter serum glucose (mg/dL).",
      "Enter body weight (kg).",
      "Enter sex.",
      "Read your corrected na (1.6 factor) on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "na": 90,
        "glucose": 360,
        "kg": 42,
        "sex": "male"
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "na": 128,
        "glucose": 600,
        "kg": 70,
        "sex": "male"
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "na": 205,
        "glucose": 960,
        "kg": 112,
        "sex": "male"
      }
    }
  ],
  "limitations": [
    "Population formulas describe averages; individual bodies vary, especially at the extremes of height, age, or muscle mass.",
    "Results do not account for medical conditions, medication, or pregnancy.",
    "Use this as a directional reference, not a diagnosis — talk to a clinician before acting on it."
  ],
  "faq": [
    {
      "q": "Which correction factor is right?",
      "a": "The 2.4 Hillier factor fits better at glucose above 400 mg/dL; 1.6 is the traditional figure and closer at mild elevations."
    },
    {
      "q": "How fast should sodium be corrected?",
      "a": "Slowly. Rapid correction of chronic hyponatremia risks osmotic demyelination — this is a clinical decision, not a calculator output."
    }
  ],
  "related": [],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Corrected Sodium Calculator (https://www.revenuelab.fyi/toolbox/corrected-sodium)"
}