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
1Go to Settings → Connectors → Add custom connector
2Enter the details below and click Add
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Done — works on Claude chat, desktop, and mobile
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