# Calorie Calculator

## Overview
A tool to calculate daily calorie needs (TDEE) and macronutrient split based on personal metrics and activity level.

## Features
- Calculate Basal Metabolic Rate (BMR) using Mifflin-St Jeor formula
- Calculate Total Daily Energy Expenditure (TDEE) based on activity level
- Generate calorie goals for different objectives (maintain, lose, gain weight)
- Calculate macronutrient split (protein, carbs, fat) at maintenance calories

## Inputs
- Gender (Male/Female)
- Age (15-120 years)
- Height (100-250 cm)
- Weight (30-300 kg)
- Activity Level (Sedentary, Light, Moderate, Active, Very Active)

## Outputs
- BMR: Basal Metabolic Rate (calories burned at rest)
- TDEE: Total Daily Energy Expenditure (calories burned with activity)
- Calorie Goals: 6 different calorie targets for various weight change objectives
- Macronutrient Split: Grams of protein, carbs, and fat at maintenance

## Formula
Uses the Mifflin-St Jeor equation:
- Male: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age + 5
- Female: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161
- TDEE = BMR × Activity Multiplier

## Use Cases
- Fitness planning and nutrition tracking
- Weight loss or gain goal setting
- Calorie deficit/surplus calculation
- Macronutrient planning for diet