RD Practice Test 2026 — Free RD Exam Prep Questions
The Registration Examination for Dietitians is CDR's entry-level exam for the RD/RDN credential. Candidates take it after completing an accredited program and supervised practice. Our practice questions follow CDR's four-domain test specifications and include clinical vignettes with checked calculations (BMI, Mifflin-St Jeor, tube feeding, weight change, yield), plus community nutrition, management and foodservice items, with an explanation for every option.
A catered lunch needs 50 portions of 4 oz cooked, boneless roast beef. The roast has a 70% yield from as-purchased to edible cooked portion. About how many pounds should be purchased?
RD format, scoring & key facts
Computer-based, at Pearson VUE test centers · computer-adaptive.
Facts last verified Oct 4, 2026. Source: www.cdrnet.org/vault/2459/web//2027-2031%20RD%20Test%20Specifications%20and%20Expanded%20Study%20Outline.pdf. Always confirm details with CDR before your exam.
When can you take the RD?
Plan backwards from your exam date
What the RD covers
Every PrepBanq RD test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | Our practice questions |
|---|---|---|
Fundamentals of Dietetics PracticeManagement and leadership, human resources, quality improvement, marketing and public relations, research applications and professional practice (ethics, scope, HIPAA, informatics). | 23% | 6 questions → |
Community and Public Health NutritionDietary guidance (DGA, DRIs), food assistance programs, community needs assessment and surveillance data, and planning, delivering and evaluating nutrition programs and education. | 22% | 5 questions → |
Human Nutrition and Medical Nutrition TherapyNutrition science and physiology, screening and assessment, nutrition diagnosis (PES), MNT including enteral/parenteral nutrition, and monitoring and evaluation. | 40% | 10 questions → |
Food Science and Food SystemsFood composition and food science, menu development, and the flow of food from procurement through production, food safety and service. | 15% | 4 questions → |
Your path to passing the RD
Diagnostic
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RD FAQ
How long is the RD exam?
Testing time for the RD is 3 hours.
What is the passing score for the RD?
RD passing standard: 25 (scaled, 1–50 scale). Score range: 1–50.
What is on the RD?
The RD covers Fundamentals of Dietetics Practice (about 23%), Community and Public Health Nutrition (about 22%), Human Nutrition and Medical Nutrition Therapy (about 40%), Food Science and Food Systems (about 15%).
Who administers the RD?
The Registration Examination for Dietitians (RD Exam) is administered by CDR. Delivery: Computer-based, at Pearson VUE test centers.
Is there a free RD practice test?
Yes. PrepBanq has 3 free RD practice tests with 25 exam-style questions in the real RD formats, and every answer is explained. No credit card is needed.
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