BMI Calculator

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The Problem

Body Mass Index (BMI) is a widely used indicator of body fat, but calculating it can be confusing.

• Quick screening tool for weight-related health risks
• Often confusing for non-medical users
• Manual calculation requires formulas and unit conversions

Our solution: A simple, interactive BMI calculator built with Shiny.

How the App Works

The app takes two inputs and instantly computes BMI.

• Weight (in kilograms)
• Height (in centimeters)

The formula used is:

BMI = weight (kg) / (height (m))²

The result is displayed with a category (Underweight, Normal, Overweight, Obese).

Live Demo

Try the app here: https://adlinehaha.shinyapps.io/bmi_calculator/

The app features:

• Clean sidebar layout with numeric inputs
• A Calculate BMI button to trigger computation
• Instant display of BMI value and category
• A reference table of WHO BMI categories

Example: For a person weighing 70 kg and 170 cm tall, BMI = 24.2.

Why It Matters & What’s Next

Why this app is useful:

• Accessible: No medical background needed
• Fast: Instant results with a single click
• Educational: Includes a reference table for context

Future improvements:

• Add weight unit options (lbs)
• Include BMI-for-age for children
• Add trend tracking over time

Thank you!