Calorie Calculator

This Ruby on Rails application provides a simple calorie calculator that helps users estimate their daily calorie needs and recommends a calorie intake for weight loss.

Demo: https://apb-kcal-e4f6df54a128.herokuapp.com

Features

• Calculate Total Daily Energy Expenditure (TDEE) based on user input
• Provide recommended calorie intake for weight loss

Setup

1. Clone the repository:

   git clone https://github.com/your-username/calorie-calculator.git
   cd calorie-calculator
   

2. Install dependencies:

   bundle install
   

3. Set up the database:

   rails db:setup
   

4. Start the Rails server:

   ./bin/dev
   

5. Visit http://localhost:3000 in your browser to use the application.

Project Structure

• app/controllers/calorie_calculator_controller.rb: Contains the logic for calculating TDEE and weight loss calories.
• app/views/calorie_calculator/index.html.erb: The main view with the calorie calculator form and results display.
• app/javascript/controllers/calorie_calculator_controller.js: Stimulus controller for handling responses and updating the DOM.

Calculations

The application uses the following formulas:

1. Basal Metabolic Rate (BMR):

   • For men: 88.362 + (13.397 * weight) + (4.799 * height) - (5.677 * age)
   • For women: 447.593 + (9.247 * weight) + (3.098 * height) - (4.330 * age)

2. Total Daily Energy Expenditure (TDEE): BMR * activity factor

   Activity factors:

   • Sedentary: 1.2
   • Light Exercise: 1.375
   • Moderate Exercise: 1.55
   • Active: 1.725
   • Very Active: 1.9

3. Weight Loss Calorie Recommendation: TDEE * 0.85 (15% calorie deficit)

License

This project is licensed under the MIT License - see the LICENSE.md file for details.