What percentage do SACs contribute to a VCE study score?

For most VCE subjects, SACs (GA1 Unit 3 coursework + GA2 Unit 4 coursework) contribute 50% total (25% each) and the final exam contributes 50%. Mathematics subjects are different: Maths Methods and Specialist Maths have SACs contributing 40% and exams 60%. Some other subjects have different splits — always check your VCAA Study Design.

What is SAC moderation and how does it affect my study score?

VCAA uses statistical moderation to adjust SAC marks across different schools. Your school's SAC ranking is preserved, but the actual marks are rescaled based on how your school's students performed in the final examination. This means your SAC marks may go up or down after moderation, depending on how your school cohort performed on the exam relative to their SAC ranks.

What is the difference between a raw and scaled study score?

A raw study score (0-50) is your percentile rank within the cohort of students who studied the same subject. A scaled study score is adjusted by VTAC to account for the academic strength of the cohort taking that subject. Subjects with stronger cohorts (like Specialist Maths or Latin) are scaled up, while subjects with weaker cohorts may be scaled down.

VCE · VCAA Methodology Grade Distributions

Study Score Calculator

Enter your SAC and exam marks → see raw and scaled study score estimates

— Raw SS

— Scaled SS

Select your VCE subject

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School Context

Approximate size of your cohort in this subject

Students at your school in this subject

Your estimated school rank (1 = top)

School rank percentile: —

🎯 Target Study Score

What study score are you aiming for?

Estimated Raw Study Score

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Enter your marks above

0 20 30 40 50

0–24 Below avg

25–34 Average

35–43 Above avg

44–50 Elite

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Percentile

within subject cohort

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Scaled Score

VTAC estimate (2024)

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Grade Band

approx. VCE grade

Assessment Contribution Breakdown

Exam Score Sensitivity — What could you achieve?

Where you sit on the VCE bell curve

01020304050

Your position: —

VCE Study Score Reference — Percentile Equivalents

Study Score	Approx. Percentile	Description	% of students above
50	99.7th	Perfect — top ~3 students per 1,000	<0.3%
48–49	99.0th–99.5th	Elite — top 1%	<1%
45–47	97th–99th	Outstanding — top 2–3%	~2–3%
43–44	94th–96th	Excellent — top 5%	~4–6%
40–42	89th–93rd	Very Good — top ~10%	~7–11%
37–39	81st–88th	Good — top 12–19%	~12–19%
34–36	69th–80th	Above Average — top 20–31%	~20–31%
30–33	50th–68th	Average — around the median	~32–50%
25–29	28th–49th	Below Average — lower half	~51–72%
20–24	10th–27th	Well Below Average	~73–90%
<20	<10th	Bottom 10%	>90%

How the Calculator Works

Enter marks — Input your actual or estimated scores for Unit 3 SAC, Unit 4 SAC and your exam mark (as a percentage).

Standardisation — Each mark is standardised using the subject's state mean and standard deviation (z-score method from VCAA).

Weighting — Standardised z-scores are multiplied by each assessment's contribution weighting (e.g. 25% GA1 + 25% GA2 + 50% GA3).

Ranking → Study Score — Your weighted total is ranked against a normal distribution of all students, and a raw study score (0–50) is assigned based on your percentile.

Scaling — VTAC then scales the raw study score based on the academic strength of the subject's cohort, producing the final scaled study score used in your ATAR aggregate.

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Study Score Calculator — VCE SAC & Exam Score Estimator

Q: How is a VCE study score calculated?

VCAA calculates your study score by standardising your marks for each graded assessment (GA1 Unit 3 SAC, GA2 Unit 4 SAC, GA3 exam), multiplying each by its weighting (typically 25%/25%/50%), summing the weighted standardised scores, ranking all students, and assigning study scores from 0 to 50. A score of 30 indicates median performance.

Q: What is a good VCE study score?

A study score of 30 is the median (50th percentile). A score of 35 is approximately the 69th percentile. A score of 40 is roughly the top 9% (91st percentile). A score of 45 is about the top 2% (98th percentile). A perfect 50 is achieved by fewer than 1% of students in most subjects.

Our accurate VCE Study Score Calculator helps Victorian Year 12 students estimate their raw and scaled study score based on their School-Assessed Coursework (SAC) results and exam performance. Built using VCAA's official published methodology — including z-score standardisation, assessment weighting, and percentile ranking — this tool gives you a realistic picture of where you stand in your subject cohort and what study score you can expect.

What Is a VCE Study Score?

A VCE study score is a number from 0 to 50 that indicates how you performed in a subject relative to all other Victorian students who sat the same subject in the same year. It is not a mark out of 50 — it is a rank expressed as a standardised score. Key reference points:

Score of 30 — the median; you outperformed exactly 50% of students in your subject.
Score of 35 — approximately the 69th percentile; top 31%.
Score of 40 — approximately the 91st percentile; top 9%.
Score of 45 — approximately the 98th percentile; top 2%.
Score of 50 — the 99.7th percentile; fewer than 0.3% of students achieve this in most subjects.

Study scores are calculated by the Victorian Curriculum and Assessment Authority (VCAA) after the end of the academic year, once all SAC and exam results are finalised.

How Is a VCE Study Score Calculated? The Full VCAA Method

VCAA uses a precise statistical process to convert your raw assessment marks into a study score. Here is the step-by-step method:

Graded Assessments (GAs) — Your study has between 1 and 3 Graded Assessments: GA1 (Unit 3 SAC), GA2 (Unit 4 SAC), and GA3 (end-of-year exam). Each GA contributes a set percentage to your final study score.
Statistical Moderation of SACs — Because SACs are written by individual schools and marked by teachers, they cannot be directly compared across schools. VCAA moderates each school's SAC results using the school's exam performance. Your rank within your school is preserved, but the actual marks are adjusted to a state-wide standard.
Standardisation (Z-Scores) — Each moderated/final mark is standardised using: z = (score − state mean) ÷ state standard deviation. This converts every student's mark to a common scale regardless of the assessment.
Weighted Sum — For English (typical weighting): (GA1 z-score × 0.25) + (GA2 z-score × 0.25) + (GA3 z-score × 0.50). For Maths Methods and Specialist: (GA1 z-score × 0.20) + (GA2 z-score × 0.20) + (GA3 Exam 1 z-score × 0.22) + (GA3 Exam 2 z-score × 0.38).
Ranking and Score Assignment — All students' weighted sums are ranked. VCAA then assigns study scores: the distribution follows a roughly normal curve with mean 30 and standard deviation of approximately 7. Roughly 25 points are awarded to the top score position per 1,000 students.
Scaling for ATAR — VTAC then scales raw study scores for ATAR calculation, boosting scores in subjects with academically stronger cohorts (like Specialist Mathematics or Latin) and slightly reducing scores in subjects with lower-performing cohorts.

SAC Contribution by Subject

The percentage that SACs contribute to your study score varies by subject. The most common weightings are:

Subject	GA1 (Unit 3 SAC)	GA2 (Unit 4 SAC)	GA3 (Exam)
English / Literature / EAL	25%	25%	50%
Mathematical Methods	20%	20%	60% (split across 2 exams)
Specialist Mathematics	20%	20%	60% (split across 2 exams)
Chemistry / Physics / Biology	25%	25%	50%
History (all)	25%	25%	50%
Psychology / Legal Studies	25%	25%	50%
General Mathematics	25%	25%	50%
Music Performance	30%	30%	40%
Visual Arts / Studio Arts	50% (SAT)	—	50%
Physical Education	25%	25%	50%

Always check the official VCAA Study Design for your specific subject's assessment weightings, as these can change.

What Is SAC Moderation?

SAC moderation is VCAA's process for ensuring that SAC marks from different schools are comparable on a state-wide scale. Because a SAC at one school may be harder or easier than at another, the raw marks a teacher assigns cannot be directly compared. VCAA solves this by:

Preserving each school's rank order of students within the subject — your position relative to your classmates does not change.
Using the school's exam results as a reference point to rescale SAC marks to the state-wide distribution. If your school's students collectively performed strongly in the exam, your SAC marks will be moderated upward. If the cohort performed poorly, moderation may reduce marks.
Potentially using General Achievement Test (GAT) results as a check when exam data is unreliable.

The practical implication: your ranking within your school matters more than your actual SAC percentage. Topping your school's class in a SAC is what secures your position, regardless of whether the school awarded high or low marks.

How to Maximise Your VCE Study Score

Rank high in SACs — Since moderation preserves your school rank, being the top student in your school's cohort is the primary goal for SACs, not the absolute mark.
Prioritise the exam — For most subjects, the exam contributes 50% and is the most reliable indicator of performance. In Maths, the exam contributes 60%.
Practise past exams under timed conditions — VCAA publishes past papers and examiner reports. These are the single most effective study resource.
Understand marking schemes — Examiner reports reveal common mistakes and what markers award points for. Read them carefully.
Don't neglect Unit 3 — Your Unit 3 SAC (GA1) contributes 25% to your study score, even though it happens earlier in the year. Strong early performance builds a cushion.
Choose your subject wisely — If you are exceptional in a subject that happens to scale well (like Specialist Maths or a language), that is a significant advantage. But a mediocre mark in a high-scaling subject may contribute less than an excellent mark in a moderate-scaling one.

Raw vs Scaled Study Score — What's the Difference?

Your raw study score (calculated by VCAA) reflects your percentile ranking within your subject cohort. Your scaled study score (applied by VTAC for ATAR purposes) adjusts the raw score to account for the academic quality of the students taking that subject:

If a subject attracts high-achieving students (like Specialist Mathematics), the same raw score will scale upward — because beating those strong students is harder.
If a subject has a broader range of students (like General Mathematics), the same raw score may scale downward.
Scaling does not affect which students receive which raw study scores. It only adjusts them for ATAR comparison purposes.
Raw scores of 50 in any subject always scale to approximately 50 or slightly above. Raw scores of 0 in any subject always scale to 0.

Frequently Asked Questions

How is a VCE study score calculated?

VCAA standardises your GA1, GA2 and GA3 marks (using z-scores), multiplies each by its assessment weighting (typically 25%/25%/50%), sums the weighted z-scores, ranks all students, and assigns study scores from 0 to 50 based on percentile position. A score of 30 is the median.

How much do SACs count toward my study score?

For most VCE subjects, SACs (GA1 + GA2) contribute 50% and the exam 50%. For Mathematical Methods and Specialist Mathematics, SACs contribute only 40% and exams 60%. Music Performance is 60% internal, 40% exam. Always check the VCAA Study Design for your specific subject.

What is a good VCE study score?

30 is average (50th percentile). 35 is solid (69th percentile, top 31%). 40 is excellent (91st percentile, top 9%). 45+ is outstanding (top 2%). 50 is a perfect score achieved by fewer than 1 in 300 students in most subjects.

What is SAC moderation and will it hurt my score?

Moderation rescales your school's SAC marks based on how your school cohort performed in the exam. Your rank within your school is preserved. If your school cohort performs well on the exam, SAC marks are moderated upward. If poorly, marks may be reduced. Focus on ranking highly in your school, not on the absolute SAC percentage.

What's the difference between raw and scaled study scores?

Your raw study score (0–50) is your percentile rank within your subject cohort. Your scaled study score is adjusted by VTAC based on the academic strength of that cohort. It's the scaled score that is used in your ATAR aggregate. High-scaling subjects boost lower raw scores; low-scaling subjects reduce them slightly.

Is this calculator official?

No. This is an independent tool using VCAA's published methodology and 2026 grade distribution data. Actual study scores are calculated by VCAA using exact statewide cohort data. Use this tool for planning and goal-setting only. Always refer to vcaa.vic.edu.au for official guidance.