Complete guide to CDAT vs American DAT differences and the new American DAT scoring system launched in 2024. Learn how scores are calculated and what dental schools expect.
CDAT vs American DAT: What You Need to Know
The Dental Admission Test (DAT) comes in two versions: the American DAT administered by the ADA in the United States, and the Canadian DAT (CDAT) administered by the CDA in Canada. Understanding the differences is crucial for your dental school application strategy.
Key Differences Between CDAT and American DAT
Test Structure
American DAT:
- Survey of Natural Sciences (Biology, General Chemistry, Organic Chemistry): 100 questions, 90 minutes
- Perceptual Ability Test (PAT): 90 questions, 60 minutes
- Reading Comprehension: 50 questions, 60 minutes
- Quantitative Reasoning: 40 questions, 45 minutes
- Total testing time: 4 hours 15 minutes
Canadian DAT (CDAT):
- Biology: 40 questions, 50 minutes
- Chemistry: 30 questions, 45 minutes
- Perceptual Ability: 90 questions, 60 minutes
- Reading Comprehension: 50 questions, 50 minutes
- Manual Dexterity (Soap Carving): hands-on practical test
- Total testing time: 4 hours 30 minutes plus carving
Major Differences
Manual Dexterity: The CDAT includes a soap carving test that the American DAT does not have. This tests fine motor skills critical for dental procedures.
Math Section: The American DAT includes quantitative reasoning. The CDAT does not have a separate math section.
Chemistry Split: The CDAT combines general and organic chemistry into one section. The American DAT separates them within the Natural Sciences section.
Scoring: The tests use different scoring scales (explained below).
The New American DAT Scoring System (2024)
In 2024, the ADA introduced a new scoring system for the American DAT to provide more granular score differentiation at the high end.
Old Scoring System (Pre-2024)
- Score range: 1 to 30
- Standard score of 17 to 18 was average
- Score of 20+ was competitive
- Score of 23+ was highly competitive
- Limited differentiation at top end (many students scored 25-30)
New Scoring System (2024+)
- Score range: 1 to 30 (scale remains the same)
- Enhanced granularity through decimal scoring in some sections
- Percentile ranks now provided alongside standard scores
- Academic Average (AA) and Total Science (TS) scores calculated differently
- More precise measurement of performance differences
What Changed?
The new system provides percentile ranks that show exactly where you stand compared to other test-takers. A score of 20 might be 70th percentile one year and 65th percentile another year, depending on the applicant pool.
The scoring algorithm was recalibrated to reduce score compression at the high end, making it easier for dental schools to differentiate between top performers.
Score Interpretation Under New System
Below 17: Below average, may limit school options 17-19: Average range, competitive for some programs 20-22: Above average, competitive for most programs 23-25: Strong scores, competitive for top programs 26+: Exceptional scores, highly competitive everywhere
CDAT Scoring System
The CDAT uses a different scale:
- Score range: 0 to 30 for each section
- Manual dexterity scored separately (Pass/Fail or scaled score depending on year)
- No Academic Average calculation
- Canadian schools evaluate section scores individually
Which Test Should You Take?
Take the American DAT if:
- Applying to U.S. dental schools
- Strong in math and quantitative reasoning
- Prefer computer-based testing without manual components
Take the CDAT if:
- Applying to Canadian dental schools
- Confident in manual dexterity and fine motor skills
- Prefer combined chemistry section
Important: Most U.S. schools do not accept CDAT scores, and most Canadian schools do not accept American DAT scores. Verify requirements with each school.
Preparing for the New American DAT
With the new scoring system, it is more important than ever to:
- Take multiple practice tests to understand your percentile performance
- Focus on weak sections since granular scoring reveals small differences
- Aim for balanced scores across all sections
- Understand percentile targets for your target schools
Recommended DAT Prep Courses
Check our DAT course rankings for courses updated for the new scoring system.
FAQ
Q: Can I use my American DAT score for Canadian schools? A: Most Canadian schools require the CDAT, but some may accept American DAT scores. Check with individual schools.
Q: Is the new American DAT harder? A: The difficulty level has not changed. The scoring system simply provides more precise differentiation.
Q: What is a good DAT score under the new system? A: A score of 20+ (typically 70th percentile or higher) is competitive for most dental schools.
Q: Do I need to retake if I took the DAT before 2024? A: No, old scores are still valid. Schools understand both scoring contexts.
Q: How is the soap carving scored on the CDAT? A: Evaluators assess accuracy, proportion, and finish quality. Scoring varies by year but typically uses a scaled system.
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