Introduction
When learning JavaScript, one of the best ways to improve is by building small, practical tools.
In this article, I'll show how I built a simple BMI calculator using HTML, CSS, and vanilla JavaScript.
This project is beginner-friendly and helps you practice working with form inputs and JavaScript logic.
What We'll Build
List the features.
Features:
• Instant BMI calculation
• Clean and simple interface
• Works on mobile devices
• Built using only HTML, CSS, and JavaScript
Live Demo
Demo Link
(https://yuvronixstudio.github.io/simple-bmi-calculator/)
Project Structure
project-folder
├── index.html
├── style.css
└── script.js
HTML Code:
The HTML structure contains two input fields:
• Height
• Weight
The result will be displayed as the user fills in the input fields.
CSS Styling:
The layout uses flexbox to center the calculator on the page.
JavaScript Logic:
The BMI formula:
BMI = weight / (height x height)
Result Output:
Source Code:
Source Code:
(https://github.com/YuvronixStudio/simple-bmi-calculator/)
If you'd like the full source code bundle
for all my JavaScript calculators (BMI, EMI, Interest),
you can find it here:
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