---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/nutrition-data/use-cases/calculate-meal-calories/chatgpt
---
# How to Calculate Meal Calories with ChatGPT

ChatGPT makes meal calorie counting feel effortless. Describe what you ate in plain language and get a complete nutritional total with clear explanations of where the calories come from. It can suggest lower-calorie swaps, format results as a nutrition label, and help you plan an entire day of meals that stay within your targets.

## Setup

{"mcpServers":{"toolrouter":{"command":"npx","args":["-y","toolrouter-mcp"]}}}

## Steps

1. Configure ToolRouter in ChatGPT
2. Ask: "Calculate calories for a meal with 2 eggs, 2 slices of toast, and a tablespoon of butter"
3. ChatGPT looks up each food and totals the nutrition
4. Request: "How could I reduce the calories while keeping the protein?"
5. Get substitution suggestions with recalculated totals

## Example Prompt

```
Calculate the total nutrition for my breakfast: 2 scrambled eggs, 1 slice whole wheat toast, 1 tablespoon butter, and a cup of orange juice.
```

## Tips

- ChatGPT can suggest lower-calorie swaps for specific ingredients
- Ask for a meal-by-meal daily total to track your full day of eating
- Request the results formatted as a nutrition label
