VCE scaling is the process VTAC uses to convert your raw study scores (0 to 50) into scaled study scores (0.00 to 55.00) so students taking different subjects can be compared fairly. If vce scaling confuses you, you are not alone: it is one of the most misunderstood parts of the ATAR system.
How VTAC scales study scores
The process follows a fixed logic each year:
- VCAA calculates your raw study scores, standardised so the average score in every study is 30.
- VTAC looks at how the students in each study performed in all their other studies. This measures how competitive that subject’s cohort was.
- If a study’s cohort performed more strongly across their other subjects, scores in that study are scaled up. If the cohort performed less strongly, scores are scaled down.
- The result is your scaled study score. These scaled scores, not the raw ones, are what build your ATAR aggregate.
The key point: vce scaling reflects cohort strength, not subject difficulty. A subject does not scale up because it is hard; it scales up because the students who choose it tend to be strong across all their subjects.
Raw vs scaled: an example
The table below is illustrative, based on published scaling reports. Exact figures change every year with each new cohort.
| Subject | Scaled score, approximate (raw study score 35) |
|---|---|
| General Mathematics | 33 |
| Mathematical Methods | 41 |
| Specialist Mathematics | 48 |
The same raw 35 becomes a 48 in Specialist Maths and a 33 in General Maths. That is why two students with identical raw scores can end up with very different aggregates.
What scaling means for your subject choices
- Do not pick subjects just to game scaling. A strong raw score in a subject you are good at beats a mediocre score in a high-scaling subject every time.
- English is compulsory in your aggregate, so it always counts at full value.
- Your 5th and 6th subjects only contribute 10% of their scaled scores, so scaling matters most for your top four.
VCE Scaling: Key Facts
See scaling in action
Reading about vce scaling is useful, but the fastest way to understand it is to try it. Enter your expected study scores in the free ATAR Calculator and watch how different subject combinations change your estimate. For the full technical detail, see VTAC’s ATAR and Scaling Guide.