Look Up Food Nutrition
Search for any food and get detailed nutritional information including calories, protein, fat, and carbohydrates.
Calculate Meal Calories
Add up the total calories and macros for a complete meal by looking up each ingredient individually.
Quick answer: Use the Nutrition Data tool through ToolRouter to calculate meal calories directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolCalorie counting for home-cooked meals is tedious. Every ingredient needs to be weighed, looked up, and calculated individually, then totaled for the whole dish. A simple stir-fry might have ten ingredients, each contributing different amounts of calories, protein, fat, and carbs. Most people either skip the calculation entirely or estimate badly.
With the search_foods and get_nutrition skills, you can look up every ingredient in a meal and calculate the total nutritional content. List your ingredients and quantities, get the per-ingredient breakdown, and add them up for an accurate total. This turns what used to be a 20-minute spreadsheet exercise into a quick conversation.
This is essential for anyone tracking calories -- dieters, athletes, people with diabetes managing carb intake, or anyone following a structured nutrition plan. It is also valuable for food bloggers who want to include accurate nutrition labels with their recipes and meal prep services that need to label their products correctly.
How to calculate meal calories with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Claude handles multi-ingredient meal calculations as a single conversation. List every ingredient with quantities, and Claude looks up each one, aggregates the totals, and walks you through the per-serving breakdown. Follow up to swap ingredients and see how the totals change, making it easy to iterate toward your nutrition targets.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
How to calculate meal calories with Claude
Once connected (see setup above), use the Nutrition Data tool:
- Ask Claude: "Calculate the total calories for this meal: 200g chicken breast, 1 cup brown rice, 1 cup steamed broccoli. Use nutrition-data for each ingredient."
- Claude looks up each ingredient and calculates the totals
- Ask: "What are the total macros -- protein, fat, and carbs?"
- Use the breakdown for your nutrition tracking
Example prompt for Claude
Try this with Claude using the Nutrition Data tool
I had a lunch of grilled salmon (150g), quinoa (1 cup cooked), and roasted vegetables (200g mixed). Calculate total calories and macros using nutrition-data.
Tips for Claude
- Be specific about quantities and preparation methods for accurate results
- Ask Claude to break down the contribution of each ingredient to the total
- Request the meal as a percentage of daily recommended intake
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.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
How to calculate meal calories with ChatGPT
Once connected (see setup above), use the Nutrition Data tool:
- Ask: "Calculate calories for a meal with 2 eggs, 2 slices of toast, and a tablespoon of butter"
- ChatGPT looks up each food and totals the nutrition
- Request: "How could I reduce the calories while keeping the protein?"
- Get substitution suggestions with recalculated totals
Example prompt for ChatGPT
Try this with ChatGPT using the Nutrition Data tool
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 for ChatGPT
- 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
Copilot turns meal calculations into structured data you can use in code. Get ingredient-level breakdowns as JSON objects, generate nutrition label components from the results, and build calorie-tracking features directly from the API output. Perfect for developers building health and fitness applications who need real data during development.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
How to calculate meal calories with Copilot
Once connected (see setup above), use the Nutrition Data tool:
- In Copilot Chat: "Calculate total calories for 200g chicken, 150g rice, 100g vegetables"
- Copilot looks up each food and returns the totals
- Ask: "Output the result as a JSON object for my calorie tracking app"
- Integrate the calculation logic into your application
Example prompt for Copilot
Try this with Copilot using the Nutrition Data tool
Look up nutrition for each ingredient in this meal and return total macros as JSON: chicken breast 200g, brown rice 1 cup, broccoli 150g.
Tips for Copilot
- Build meal calculation features into your nutrition app using the API
- Generate test data for calorie tracking applications
- Use the structured output to create nutrition label components
OpenClaw processes meal calculations systematically, looking up each ingredient and returning aggregated totals in a structured format. It excels at batch processing multiple meals at once, making it the right choice when you need to calculate nutrition for an entire week of meal prep or a full restaurant menu.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsHow to calculate meal calories with OpenClaw
Once connected (see setup above), use the Nutrition Data tool:
- Ask OpenClaw: "Calculate total calories for a meal of pasta (200g), marinara sauce (100g), and parmesan (30g)"
- OpenClaw looks up each ingredient and totals the nutrition
- Ask: "What is the macro split for this meal?"
- Use the results for your nutrition tracking
Example prompt for OpenClaw
Try this with OpenClaw using the Nutrition Data tool
Add up the calories and macros for dinner: 200g spaghetti, 150g tomato sauce, 100g ground beef, and 20g parmesan cheese.
Tips for OpenClaw
- Include cooking oils and sauces -- they often add significant calories
- Ask for per-serving calculations if the meal is for multiple people
- Track meals over several days to see patterns in your nutrition
Frequently Asked Questions
How do I calculate meal calories with an AI assistant?
Add up the total calories and macros for a complete meal by looking up each ingredient individually. Connect the Nutrition Data tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask Claude: "Calculate the total calories for this meal: 200g chicken breast, 1 cup brown rice, 1 cup steamed broccoli. Use nutrition-data for each ingredient." Claude looks up each ingredient and calculates the totals
Which AI assistants can calculate meal calories?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all calculate meal calories using the Nutrition Data tool through ToolRouter, with no API keys or coding required.
What does the Nutrition Data tool do?
Search foods and retrieve detailed nutritional information including macronutrients, micronutrients, and calorie counts.
Related Use Cases
Research Macronutrient Profiles
Find foods that match specific macronutrient targets like high protein, low carb, or balanced fat ratios.
Compare Nutritional Values
Compare the full nutritional profiles of two or more foods side by side to make informed dietary choices.
Build Nutrition Labels
Generate nutrition facts data for recipes and food products by aggregating ingredient-level nutritional information.