How to Calculate Meal Calories with Claude
Calculate meal calories with Claude and ToolRouter. Total nutrition for any recipe or meal.
Tool
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
Steps
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
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
- 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