Registered Dietitian Exam 2026

Practice tests for the registered dietitian exam: CDR RD and RDN exam prep.

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Ready to Pass RD - Registered Dietitian Nutritionist?

Domain 1 — Principles of Dietetics (21%)
Domain 2 — Nutrition Care for Individuals and Groups (45%)
Domain 3 — Management of Food and Nutrition Programs and Services (21%)
Domain 4 — Foodservice Systems (13%)

Exam format: computer adaptive test, 125 to 145 items (25 unscored pretest items), 3 hours of testing inside a 3.5-hour appointment, scaled score of 1-50 with a passing score of 25.

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All content provided in this application is for educational and practice purposes only. The practice questions and study materials are designed to help candidates prepare for the RD - Registered Dietitian Nutritionist certification exam and do not represent actual exam questions from CDR. This app does not guarantee that users will pass the RD - Registered Dietitian Nutritionist exam. Exam results depend on individual preparation, experience, and understanding of the subject matter. All trademarks, service marks, trade names, and logos referenced herein belong to their respective owners. Any reference to CDR, RD, or related certification programs is purely for descriptive purposes. By using this application, you acknowledge and agree that the developers are not responsible for any exam outcomes or certification decisions made by CDR.

This application is an independent exam preparation resource and is not affiliated with, endorsed by, sponsored by, or associated with the Commission on Dietetic Registration (CDR), the Academy of Nutrition and Dietetics, or any of their subsidiaries. RD (Registered Dietitian) and RDN (Registered Dietitian Nutritionist) are registered trademarks of the Commission on Dietetic Registration.