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Ponderal Index API

Estimate body proportionality using ponderal index with age-group-aware interpretation.

Endpoint

  • GET /api/v1/ponderal-index
  • POST /api/v1/ponderal-index/post

Parameters

Name Type Required In Description
weight number Yes Query/Body Body weight value.
height number Yes Query/Body Body height value.
age_group string No Query/Body adult (default) or infant.
unit string No Query/Body metric (default) or imperial.
height_unit string No Query/Body For metric mode: m (default) or cm.
lang string No Query Response language (en,es,de,fr,pt,ja,hi,ar).

Why Use This Endpoint

  • Add body proportionality insight beyond BMI.
  • Support infant and adult interpretation bands.
  • Provide guidance fields for monitoring workflows.

Get Started

Request Example

curl -X GET "https://api.hefitapi.com/api/v1/ponderal-index?weight=74&height=1.75&age_group=adult&unit=metric&height_unit=m&lang=en" \
  -H "X-API-Key: YOUR_API_KEY"

curl -X POST "https://api.hefitapi.com/api/v1/ponderal-index/post?lang=en" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"weight":9.2,"height":72,"age_group":"infant","unit":"metric","height_unit":"cm"}'

Response Example

Info

The response example below is for demonstration purposes only. Make a live request to this endpoint to receive the full, real-time, and potentially richer JSON structure.

{
  "ponderal_index": 13.81,
  "interpretation": "Normal weight",
  "normal_range": "11-15",
  "unit": "metric",
  "risk_band": "target",
  "risk_band_label": "Target",
  "risk_signal": "Body proportionality is within expected range.",
  "action_plan": ["Continue balanced monitoring strategy"],
  "monitoring_plan": "Reassess with growth/body-composition context.",
  "_enterprise": {"client": "Acme Health", "plan": "pro", "request_id": "95ee056d96ad3c84", "quota": 120, "usage_tracking": true},
  "_api_metadata_": {"endpoint_name": "ponderal_index", "response_language": "en"}
}

Product Positioning

Useful for clinical calculators, pediatric tools, and body composition platforms.

Note

In metric mode, set height_unit=cm when passing height in centimeters.