BMI Calculator

This application can calculate any person's BMI using their Weight (in kg) and Height (in cm). In addition to this the application can also provide an information regarding the BMI Category and Health risk based on the calculated BMI.

This application can be used as a standalone data processor from the Database or can be exposed externally as an API.

BMI Ranges (kg/m²)

• 18.4 and below
• 18.5 - 24.9
• 25 - 29.9
• 30 - 34.9
• 35 - 39.9
• 40 and above

BMI Category and Health Risk

BMI Range	BMI Category	Health Risk
18.4 and below	Underweight	Malnutrition risk
18.5 - 24.9	Normal weight	Low risk
25 - 29.9	Overweight	Enhanced risk
30 - 34.9	Moderately Obese	Medium risk
35 - 39.9	Severely Obese	High risk
40 and above	Very Severely Obese	Very High risk

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Requirements

To run this application on your location system, the following installations are needed:

1. Node.Js
2. NPM Module
3. MongoDB

How to use

• Clone the repository

• Add your MongoDB localhost path in .env.example and rename it to .env

• Run npm run setup-app

  • This is will do a clean installation of all the node modules and setup your MongoDB database with sample documents which can be used to calculate BMI.

• Either run npm run dev to start the server in Development mode

• Or run npm run start to start the server in Production mode

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API Endpoints

URL: http://(localhost):(port)

GET Method

{URL}/patients

Description: This request will fetch all the records from the Database

Authorization: Basic Auth (Username & Password)

POST Method

{URL}/patients

Description: This request will calculate the BMI, BMI Category and Health Risk in the Database for documents where BMI is null

Authorization: Basic Auth (Username & Password)

Request Sample

{}

Response Sample

{
    "status": 200,
    "message": "6 Documents Modified"
}

{URL}/calculate

Description: This request will calculate the BMI, BMI Category and Health Risk

Authorization: Basic Auth (Username & Password)

Request Sample

{
    "Gender": "Male",
    "HeightCm": 135,
    "WeightKg": 97
}

Response Sample

{
    "HeightCm": 135,
    "WeightKg": 97,
    "BMI": 53.22,
    "Health Risk": "Very High risk",
    "BMI Category": "Very severely Obese"
}

{URL}/insert

Description: This request will calculate the BMI, BMI Category and Health Risk for the request data and insert into the database

Authorization: Basic Auth (Username & Password)

Request Sample

{
    "Gender": "Male",
    "HeightCm": 135,
    "WeightKg": 97
}

Response Sample

{
    "HeightCm": 135,
    "WeightKg": 97,
    "BMI": 53.22,
    "Health Risk": "Very High risk",
    "BMI Category": "Very severely Obese"
}