BMI Calculator 📱

A beautiful and functional BMI (Body Mass Index) Calculator mobile application built with Flutter. This app helps users calculate their BMI and provides health interpretations based on the results.

📋 Features

• Gender Selection: Choose between Male and Female with intuitive tap-to-select cards
• Height Input: Smooth slider control to select height (120cm - 220cm)
• Weight & Age Input: Easy increment/decrement buttons for precise values
• BMI Calculation: Accurate BMI calculation using the standard formula
• Health Interpretation: Get instant feedback on your BMI results:
  • Underweight (BMI ≤ 18.5)
  • Normal (BMI 18.5 - 25)
  • Overweight (BMI ≥ 25)
• Dark Theme UI: Modern, sleek dark theme design
• Ad Integration: Monetized with Google Mobile Ads

🎨 Design

The app features a modern dark theme with:

• Primary color: #0A0E21
• Active card color: #1D1E33
• Accent color: #EB1555
• Responsive and intuitive UI/UX

🚀 Getting Started

Prerequisites

• Flutter SDK (>=2.17.0 <3.0.0)
• Dart SDK
• Android Studio / VS Code with Flutter extensions
• A mobile device or emulator

Installation

1. Clone the repository

   git clone https://github.com/sivakanth1/BMI-Calculator-Using-Flutter.git
   cd BMI-Calculator-Using-Flutter

2. Install dependencies

   flutter pub get

3. Run the app

   flutter run

Configuration

To enable Google Mobile Ads:

1. Add your AdMob App ID in the platform-specific files
2. Update the ad unit IDs in lib/ad_helper.dart

📦 Dependencies

• flutter: Core Flutter SDK
• cupertino_icons: iOS-style icons
• font_awesome_flutter: Font Awesome icons for gender selection
• google_mobile_ads: Ad monetization

🏗️ Project Structure

lib/
├── main.dart                         # App entry point
├── calculator_brain.dart             # BMI calculation logic
├── constants.dart                    # App-wide constants & styles
├── ad_helper.dart                    # Ad configuration helper
├── screens/
│   ├── input_page.dart              # Main input screen
│   └── results_page.dart            # Results display screen
└── components/
    ├── reusable_card.dart           # Custom card widget
    ├── icon_content.dart            # Icon with label widget
    ├── bottom_button.dart           # Large bottom button
    └── round_icon_button.dart       # Circular +/- buttons

🧮 BMI Calculation Formula

BMI = weight (kg) / [height (m)]²

🎯 How to Use

1. Select your gender (Male/Female)
2. Adjust your height using the slider
3. Set your weight using the +/- buttons
4. Set your age using the +/- buttons
5. Tap the "CALCULATE" button
6. View your BMI result and health interpretation
7. Tap "RE-CALCULATE" to start over

🛠️ Built With

• Flutter - UI framework
• Dart - Programming language
• Font Awesome - Icons
• Google Mobile Ads - Monetization

📄 License

This project is open source and available under the MIT License.

👨‍💻 Author

Sivakanth

• GitHub: @sivakanth1

🤝 Contributing

Contributions, issues, and feature requests are welcome! Feel free to check the issues page.

⭐ Show your support

Give a ⭐️ if this project helped you!

📝 Notes

• The app locks to portrait orientation for optimal user experience
• BMI calculations follow standard WHO guidelines
• Ads are displayed as banner ads at the bottom of the input screen

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Made with ❤️ using Flutter