Exam321 Logo

RD

Registered Dietitian (RD)

The Registered Dietitian (RD) exam is the Commission on Dietetic Registration's credentialing exam for graduates of accredited dietetics programs who have completed supervised practice. It is a computer-adaptive test of 125 to 145 questions with a 3-hour time limit, taken at Pearson VUE test centers.

Practice quizzes
5
Time limit
150 min
Our users' pass rate
74%
Modules
4
Our price
FREE
Start

Certification details

Certifying bodyCommission on Dietetic Registration (CDR).
EligibilityCompletion of an ACEND-accredited didactic program in dietetics, a supervised practice program, and a bachelor's degree (moving to a master's degree requirement for new candidates).
Exam formatComputer-adaptive test, 125-145 questions, 2.5-hour time limit, administered at Pearson VUE test centers.
Content outlinePrinciples of dietetics, nutrition care for individuals and groups, management of food and nutrition programs/services, and foodservice systems.
RecertificationEvery 5 years, via continuing professional education units.
Official sourceCommission on Dietetic Registration (CDR)

CDR credentialing exam covering the science and practice of dietetics across clinical, foodservice, and community settings.

Who it's for

Graduates of an accredited dietetics program who have completed a supervised practice requirement — the credentialing step that turns a dietetics degree into a practicing Registered Dietitian, required before you can use the RD/RDN title.

What's covered

  • Principles of dietetics
  • Nutrition care process — the core clinical framework used across the profession
  • Foodservice systems management
  • Food and nutrition program management

What to expect

The exam is computer-adaptive — question difficulty adjusts in real time based on your previous answers — so expect the test to keep pushing until it can confidently determine whether you're above or below the passing standard, rather than presenting a fixed question set to everyone.

How to prepare

The Academy of Nutrition and Dietetics (AND), CDR's parent organization, offers the primary official practice questions and study materials; CDR itself publishes the exam outline and eligibility pathway, and most candidates study using their supervised-practice program materials plus AND's official practice tests.

RD Practice Quiz 1
Practice quiz · 20 questions · untimed
RD Practice Quiz 2
Practice quiz · 20 questions · untimed
RD Practice Quiz 3
Practice quiz · 0 questions · untimed
RD Practice Quiz 4
Practice quiz · 0 questions · untimed
RD Practice Quiz 5
Practice quiz · 0 questions · untimed
Registered Dietitian (RD)

We have 900+ more RD questions.

Track your results, chat with AI Tutor and test your knowledge on a mock exam!

Download our app for FREE

Get on App Store

DISCLAIMER: This exam preparation course is not affiliated with or endorsed by the Commission on Dietetic Registration (CDR). The content is designed to assist students in preparing for the Registered Dietitian (RD) (RD) exam but is created and provided by an independent third party. CDR and RD are registered trademarks of the Commission on Dietetic Registration. The use of this trademark does not imply any affiliation with or endorsement by the CDR.