BMI Calculator App

The BMI Calculator is a Shiny application that:

• Takes user weight (kg) and height (cm) as inputs
• Calculates Body Mass Index instantly
• Classifies result into health categories
• Displays a visual chart highlighting your category

Try it at: https://akshaisuresh.shinyapps.io/bmi-calculator

BMI is a widely used health screening tool but:

• Many people don't know how to calculate it
• Results mean nothing without context
• Existing tools are often cluttered

This app gives a clean, instant, visual BMI result with proper categorisation for adults and children.

# BMI Formula used in server.R
weight_kg <- 70
height_cm <- 170
bmi <- round(weight_kg / (height_cm/100)^2, 1)
cat("BMI =", bmi)

BMI = 24.2

cat("\nCategory: Normal weight")

Category: Normal weight

• User inputs weight and height via sliders
• server.R computes BMI reactively
• Result and category displayed instantly

categories <- data.frame(
  Category  = c("Underweight","Normal","Overweight","Obese"),
  BMI_Range = c("< 18.5","18.5-24.9","25-29.9",">= 30"),
  Risk      = c("High","Low","Moderate","High")
)
knitr::kable(categories)

• Simple: Just enter weight and height
• Instant: Reactive calculation — no submit needed
• Visual: Bar chart highlights your category
• Documented: Help text built into the sidebar
• Accessible: Works on any device via browser

Try it now: https://akshaisuresh.shinyapps.io/bmi-calculator