Key Takeaways
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OPRA is not scored by simply counting correct answers out of 120.
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Only 90% of the 120 questions are scored. The remaining 10% are unscored questions used for calibration.
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The exam uses scaled scoring, which keeps results fair across different versions of the exam.
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A difficult question does not automatically give you more marks.
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Your result is based on meeting a required passing standard, not on beating other candidates.
Are you confused about how OPRA is scored? Many candidates think it is a simple percentage, but it is not. This guide explains scaled scoring, scored and unscored questions, and what the Rasch model really means for your result, in plain, simple terms.
Is OPRA Scored by Simply Counting Correct Answers?
No. According to the Australian Pharmacy Council (APC) , OPRA uses a scaled scoring system, not a simple count of correct answers.
The exam has 120 multiple-choice questions, but only 90% of them are scored. The other 10% are unscored questions used for calibration and testing. This means you should not calculate your result as "80 correct out of 120."
APC explains that scaled scoring is needed because:
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Different candidates may sit different versions of the exam.
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Some questions need to be checked for difficulty and performance.
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A consistent standard must be kept across all exam versions.
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Your final result is based on your overall performance against that standard.
What Is Scaled Scoring in OPRA?
Scaled scoring turns your exam performance into a score that stays fair, even when candidates sit different versions of the exam.
Here is a simple way to picture it. Candidate A sits Form A. Candidate B sits Form B. The questions in each form are not exactly the same, some may be easier, some harder. If APC only used raw correct answers, this difference could affect results unfairly. Scaled scoring helps fix this problem.
In simple words, the process looks like this: raw performance → psychometric analysis → scaled score → comparison with the passing standard.
| Raw Score | Scaled Scoring |
|---|---|
| Just counts correct answers | Based on analyzed performance |
| Simple to calculate | Uses psychometric methods |
| Does not adjust for exam version | Keeps results consistent across versions |
| Example: 80 correct | You cannot assume 80 correct equals one fixed final score |
Source: Australian Pharmacy Council (APC)
What Is the Rasch Model?
The Rasch model is a type of psychometric model. It looks at the relationship between a candidate's ability and how difficult a question is.
In simple terms, it asks: how likely is a candidate with a certain ability level to answer a certain question correctly? The model looks at two things, the candidate's ability and the question's difficulty.
Getting a hard question right gives useful information about a candidate's ability. This is one reason modern exams look at more than just a raw count of correct answers.
Our recommendation: understand this as background knowledge, but do not assume APC has confirmed that OPRA's final score uses one specific Rasch formula. APC states that OPRA uses scaled scoring and psychometric analysis, it does not publicly confirm the exact model behind it.
How does the Rasch Model Work in Simple Terms?
Think of a candidate and a question meeting on the same scale.
| Candidate Ability | Question Difficulty | Expected Outcome |
|---|---|---|
| High | Easy | High chance of correct answer |
| High | Difficult | Reasonable chance of correct answer |
| Low | Easy | Some chance of correct answer |
| Low | Very difficult | Lower chance of correct answer |
This does not mean a difficult question automatically gives more marks. It means the response gives more information about the candidate's ability compared to the question's difficulty.
For example, picture two students. Student A gets many easy questions right but struggles with hard ones. Student B gets many easy questions right and also gets several hard ones right. Their answer patterns give different information about their ability, that is the basic idea behind this kind of measurement.
Does a Difficult Question Give You More Marks in OPRA?
You should not assume this. It is a common misunderstanding among candidates.
This kind of measurement is about understanding ability compared to question difficulty. It does not simply mean an easy question is worth 1 mark and a hard question is worth 2 marks.
APC states that 90% of questions are scored and that the exam uses scaled scoring. APC does not publish a rule saying difficult questions carry extra marks. So do not go into the exam thinking a hard question you get right will definitely give you extra marks.
Why Does OPRA Use Psychometric Scoring?
The main reason is to keep the exam fair, reliable, and consistent.
OPRA is delivered using different exam forms, so candidates do not all get the exact same questions. According to the Australian Pharmacy Council (APC) , the exam works with psychometric analysis to maintain a consistent standard across these different forms
Here's why this matters: if one exam form happens to be slightly harder than another, and only raw marks were used, candidates who got the harder form could be unfairly disadvantaged. A properly designed scaled scoring system helps reduce this risk.
| Simple Approach | Psychometric Approach |
|---|---|
| Count correct answers | Analyze candidate performance |
| Same raw-score idea for every form | Supports consistency between forms |
| Does not consider question difficulty | Considers question difficulty |
| Simple but limited | Better suited for high-stakes exams |
What Are Scored and Unscored Questions in OPRA?
OPRA has both scored and unscored questions.
According to the Australian Pharmacy Council (APC)
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The exam has 120 questions in total.
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90% of these questions are scored.
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10% are unscored questions used for calibration and testing.
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Unscored questions can appear in any topic area.
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Candidates are not told which questions are scored or unscored.
Should you try to guess which questions are unscored? No. You cannot reliably tell them apart during the exam. Our recommendation is to treat every question as important and answer all of them carefully.
Can You Calculate Your OPRA Score After the Exam?
Not accurately, no. This is one of the most common questions candidates ask after sitting the exam.
For example, say you believe you answered 85 out of 120 questions correctly. You cannot simply calculate 85 divided by 120 and assume that percentage is your official result. This is because:
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Only 90% of questions are scored.
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Some questions you answered are unscored and don't count.
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The exam uses scaled scoring, not a raw percentage.
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Different candidates may sit different exam forms.
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APC does not publish a simple formula to convert correct answers into a final score.
Our recommendation: use your post-exam self-review to get a rough sense of how you performed, but do not treat it as your official result.
Does OPRA Scoring Depend on Other Candidates?
No. According to the Australian Pharmacy Council (APC), your result is based on your performance against a required passing standard, not on how other candidates perform\
This means OPRA is not:
"I need to score higher than 70% of candidates."
"I need to be in the top 10%."
"If everyone does badly, the pass mark will drop automatically."
Instead, the goal is simply to meet the required standard, regardless of how anyone else performs.
What Does This Mean for Your OPRA Preparation?
Your preparation should focus on building strong understanding across the whole syllabus, not on guessing a raw percentage you need to pass.
According to the Australian Pharmacy Council (APC), the exam is designed to test knowledge and understanding of biomedical sciences, pharmaceutical sciences, and clinical sciences, as they apply to pharmacy practice in Australia and Aotearoa New Zealand.
Our recommendation covers three areas to focus on:
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Build concepts first. Do not rely only on memorizing answers. Understand why a drug works, why it is chosen, its adverse effects, contraindications, drug interactions, disease mechanisms, and clinical decision-making.
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Practice different question types. Get comfortable with direct knowledge questions, clinical scenarios, application-based questions, calculation questions, pharmacology questions, and pharmaceutical science questions.
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Review your mistakes properly. Do not just count how many you got wrong. Ask why, was it a concept gap, a misread question, confusing two drugs, a calculation error, or rushing? This tells you far more than a percentage score.
For a full topic-by-topic study plan, see our OPRA Study Plan 2026
What Is the Biggest Mistake Students Make About OPRA Scoring?
The biggest mistake is chasing one fixed "pass percentage" and treating it as an official rule.
You may see claims online like "you need 60%" or "you need at least 80 correct answers." Be careful with these numbers. Unless a figure comes directly from current APC information, it should not be treated as the official OPRA passing requirement.
According to the Australian Pharmacy Council (APC), candidates must meet the passing standard set for their allocated exam form. Our recommendation: do not prepare to hit an exact percentage. Prepare to perform strongly across the entire exam, that is a much safer approach.
Conclusion
Understanding how OPRA is scored can save you a lot of unnecessary worry. The exam has 120 multiple-choice questions over 2.5 hours, with 90% scored and 10% unscored for calibration. It uses scaled scoring to stay fair across different exam versions, and your result depends on meeting a required passing standard, not on beating other candidates or guessing a fixed percentage.
The Rasch model is a useful concept for understanding how ability and question difficulty relate, but APC has not publicly confirmed one exact formula behind OPRA's scoring. The safest strategy is simple: build strong understanding across the whole syllabus, practice different question types, and review your mistakes carefully. Do not waste your preparation time trying to reverse-engineer a pass mark, focus on knowing the material well.
Stop Guessing a Pass Percentage — Build Real Understanding
Since OPRA scoring rewards genuine competency, not a fixed cut-off, Elite Expertise's structured course focuses on concept-building, varied question practice, and mistake analysis, guided by practising Australian clinical pharmacists.
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