VCE scaling explained: study scores to scaled scores

What VCE scaling is and why it exists

A VCE study score is a number from 0 to 50 from the VCAA. It shows how you did compared with everyone who took the same study. That is useful inside a study, but it cannot compare a 35 in Specialist Mathematics with a 35 in Product Design, because the groups of students are different. VTAC's guide puts it this way: scaling adjusts for the fact that it is more difficult to obtain a high study score in some studies than in others, not because some studies are inherently harder or easier, but because some attract a more competitive cohort.

VTAC takes the VCAA's study scores, which are standardised so each study has an average of 30, and checks how the students in each study performed in their other studies. If the group did better elsewhere than the average student, the study's scores are adjusted up. If they did worse, they are adjusted down. The adjusted number is the scaled study score, from 0.00 to 55.00. It is the scaled study scores that are used to calculate your ATAR. VCE studies are always scaled in the year you took them, which may not be the year you receive your ATAR.

VCE scaling 2025: study score to scaled study score

VTAC published its 2025 scaling report on 11 December 2025. The report gives, for every study, the scaled mean, the standard deviation and the scaled study score (rounded to a whole number) that a study score of 20, 25, 30, 35, 40, 45 and 50 became. Here are the studies we cover. The scaling population is students who have at least four study scores including one in English and do not already have an ATAR.

The table shows how far a 30 moves. In Specialist Mathematics a study score of 30 became 43, in Mathematical Methods 35, in Chemistry 34, in Physics 32 and in Biology 31, while in General Mathematics and English it became 28. Among the studies we cover, only Specialist Mathematics (55) and Mathematical Methods (51) scale above 50 at a study score of 50.

Mathematics and languages have extra rules

• The four mathematics studies are scaled against each other. VTAC says there is a clear hierarchy: Specialist Mathematics is the most difficult, then Mathematical Methods, then General Mathematics, then Foundation Mathematics. All four are scaled against each other as well as against every other study, and the higher of the two resulting scales is used for each. See the guides to VCE Maths Methods, VCE Specialist Maths and VCE General Maths.
• Languages are adjusted up. Each language is adjusted by adding five to the initial VTAC scaled study score average. That does not add five points to the ATAR. It means about 5 at a study score near 30, falling away as the score moves away from 30.
• Small languages. A language with ten or fewer students in the scaling population is not scaled by the automatic procedure. Its adjustment is the larger of zero and the average language adjustment over the previous three years.

A worked example: from study scores to an aggregate

Take a student with these study scores: English 30, Specialist Mathematics 35, Mathematical Methods 35, Chemistry 35, Physics 35 and Biology 30. Using the 2025 table, their scaled study scores are English 28, Specialist 48, Methods 41, Chemistry 39, Physics 37 and Biology 31. The calculation follows VTAC's rules.

1. The primary four is the English score plus the next three best: 28 + 48 + 41 + 39 = 156.
2. The fifth and sixth studies each add 10 per cent of their scaled score: 10% of 37 is 3.7 and 10% of 31 is 3.1.
3. The aggregate is 156 + 3.7 + 3.1 = 162.8.

VTAC's 2025 table gives the minimum aggregate for an ATAR: 160.53 for 92.00 and 163.30 for 93.00. So 162.8 would have been an ATAR of about 92 in 2025. The figures are rounded in the report, so the result is only a rough check, and the conversion changes every year. How the aggregate is built and who gets an ATAR is covered in the ATAR in Victoria.

Common mistakes about VCE scaling

• Choosing a study because it scaled up last year. VTAC says this is a myth that can work against you. The scaled score depends on the cohort in the year you sit it. A scaled-down score in a study you did well in is likely to be higher than a scaled-up score in one you did poorly in.
• Thinking scaling measures difficulty. It measures the competitiveness of the group, not how hard the content is.
• Thinking the study score changes. Your VCAA study score does not change. VTAC calculates a separate scaled study score.
• Counting every study. Only the primary four and up to two increments count.

Test your study score first

Scaling can only move a score you have already earned. Try today's Year 12 Maths, Year 12 Physics, Year 12 Chemistry or Year 12 Biology paper under timed conditions. It is a short paper of 8 questions worth 25 to 35 marks, not a full VCAA exam. The results page shows a predicted grade from A to E with typical cut-offs, not the VCAA's. For how study scores themselves are set, see VCE study scores explained.

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