{
  "slug": "egfr-calc",
  "name": "gizza-ai/egfr-calc",
  "version": "0.1.0",
  "title": "eGFR Calculator — CKD-EPI 2021 Race-Free Kidney Function Estimate — gizza.ai",
  "description": "Estimate your eGFR (kidney filtration rate) from serum creatinine, age and sex with the race-free CKD-EPI 2021 equation. mg/dL or µmol/L, KDIGO stage. In your browser.",
  "tags": [
    "eGFR calculator",
    "CKD-EPI 2021",
    "kidney function",
    "glomerular filtration rate",
    "creatinine calculator",
    "CKD stage",
    "race-free eGFR",
    "GFR category",
    "µmol/L to mg/dL",
    "KDIGO stage"
  ],
  "category": "math",
  "urls": {
    "page": "https://gizza.ai/tools/egfr-calc/",
    "markdown": "https://gizza.ai/tools/egfr-calc/index.md",
    "descriptor": "https://gizza.ai/tools/egfr-calc/tool.json",
    "deep_link_example": "https://gizza.ai/tools/egfr-calc/?creatinine=1.0&creatinine_unit=mg%2FdL&age=50&sex=male&equation=ckd_epi_2021"
  },
  "cli": "gizza tool egfr-calc 'creatinine=1.0'",
  "tool": {
    "description": "Estimate glomerular filtration rate (eGFR) from serum creatinine, age and sex using the race-free CKD-EPI creatinine equations. Pass creatinine (with creatinine_unit=mg/dL or µmol/L), age (adults 18–120), sex (male/female), and optionally equation (ckd_epi_2021 default, the current US standard, or ckd_epi_2009 for comparison — its race coefficient is deliberately omitted). Every parameter is optional with a sensible default. Returns egfr in mL/min/1.73 m² (whole number), the KDIGO GFR category (gfr_stage G1–G5) with a plain-language stage_description, the creatinine used in mg/dL, and a summary. Informational estimate, not a diagnosis or medical advice.",
    "parameters": {
      "additionalProperties": false,
      "properties": {
        "age": {
          "default": 50.0,
          "description": "Age in whole years. CKD-EPI is validated for adults, so ages under 18 are rejected. Default 50 (range 18–120).",
          "maximum": 120,
          "minimum": 18,
          "type": "number"
        },
        "creatinine": {
          "default": 1.0,
          "description": "Serum creatinine value, in the unit given by creatinine_unit (mg/dL by default). Must be an IDMS-standardized lab value. Default 1.0.",
          "minimum": 0,
          "type": "number"
        },
        "creatinine_unit": {
          "default": "mg/dL",
          "description": "Unit of the creatinine value: mg/dL (US) or µmol/L (SI, converted by ÷88.42). Default mg/dL.",
          "enum": [
            "mg/dL",
            "µmol/L"
          ],
          "type": "string"
        },
        "equation": {
          "default": "ckd_epi_2021",
          "description": "Which race-free CKD-EPI creatinine equation to use: ckd_epi_2021 (default, the current NKF/ASN-recommended US standard) or ckd_epi_2009 (older, for historical comparison; the 2009 race coefficient is deliberately omitted).",
          "enum": [
            "ckd_epi_2021",
            "ckd_epi_2009"
          ],
          "type": "string"
        },
        "sex": {
          "default": "male",
          "description": "Biological sex used by the equation: male or female. Default male.",
          "enum": [
            "male",
            "female"
          ],
          "type": "string"
        }
      },
      "type": "object"
    }
  }
}