{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://askcalculators.com/calculator/engine-horsepower-calculator/schema.json",
  "title": "Engine Horsepower inputs",
  "description": "Estimate peak engine horsepower based on displacement, RPM, and volumetric efficiency.",
  "type": "object",
  "properties": {
    "displacement": {
      "title": "Displacement (L)",
      "type": "number",
      "default": 5
    },
    "cylinders": {
      "title": "Cylinders",
      "type": "number",
      "default": 8
    },
    "rpm": {
      "title": "Peak RPM",
      "type": "number",
      "default": 6000
    },
    "efficiency": {
      "title": "Efficiency (0.7-1.0)",
      "type": "number",
      "default": 0.85
    }
  },
  "required": [],
  "additionalProperties": false,
  "x-askcalculators": {
    "version": "7.0.0",
    "calculatorUrl": "https://askcalculators.com/calculator/engine-horsepower-calculator/",
    "queryExample": "https://askcalculators.com/calculator/engine-horsepower-calculator/?displacement=5&cylinders=8&rpm=6000&efficiency=0.85",
    "migrationStatus": "migrated",
    "reviewStatus": "pending",
    "pageStatus": "live",
    "workStatus": "pending",
    "migratedDate": "2026-08-18",
    "formula": {
      "expression": "Estimated horsepower is derived from airflow and the selected rule-of-thumb conversion factor.",
      "note": "Rule-of-thumb estimate; actual power depends on volumetric efficiency, fuel, boost, tune, drivetrain loss, and test method."
    },
    "quality": {
      "availability": "live",
      "technicalReviewRecord": "/reviews/engine-horsepower-calculator.json",
      "qualifiedReview": "pending",
      "qualifiedReviewer": null,
      "qualifiedReviewDate": null,
      "formulaVersion": "7.0.0",
      "referenceCoverage": "references-pending",
      "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
      "historicalMetadataDate": "2026-08-18",
      "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
    },
    "outputs": {
      "result": {
        "title": "Result",
        "type": "string",
        "x-format": "text",
        "x-primary": true
      }
    }
  }
}