CaloriX is an online meal-planning service designed to help people organize their food intake around a daily calorie target. Users can calculate an estimated calorie and macronutrient allowance using details such as age, height, weight, sex, and activity level, or enter a target they already know. The service then creates daily meal plans with portion weights in grams and calculated calories, protein, fat, and carbohydrates.

Recipes and individual ingredients can be replaced, with portions recalculated to fit the plan. Each recipe includes ingredient quantities and preparation steps, and users can add their own products or recipes, including product information from packaging. Saved meals can be arranged across a week, exported as a PDF, and combined into a categorized shopping list.

CaloriX also supports planning meals for several days and preparing shared dishes with different portions for family members. Its website offers sample meal plans, recipes, food and portion references, and nutrition calculators. Examples and many tools are available without registration; an account is needed to create and save personal menus