# Macro Calculator

## Overview
Calculate daily macronutrient targets for protein, carbs, and fat based on calorie goals with preset and custom macro splits.

## Features
- Set a daily calorie target with fitness goal adjustment (Cut -500, Maintain, Bulk +500)
- Choose from 5 preset macro splits: Balanced, Low-Carb, Keto, High-Protein, Zone
- Enter custom protein/carbs/fat percentages (validated to sum to 100%)
- View grams and calories per macro with a visual proportion bar
- Per-meal breakdown for 3-6 meals/day

## Preset Splits (Protein / Carbs / Fat %)
- Balanced: 30 / 35 / 35
- Low-Carb: 40 / 20 / 40
- Keto: 30 / 5 / 65
- High-Protein: 40 / 30 / 30
- Zone: 30 / 40 / 30

## Calorie Constants
- Protein: 4 calories per gram
- Carbs: 4 calories per gram
- Fat: 9 calories per gram

## Use Cases
- Meal prep planning for fitness goals
- Keto or low-carb diet macro tracking
- Bodybuilding nutrition planning
- General healthy eating macro awareness