ATAR Scaling Calculator 2026

See exactly how scaling affects your subjects. Select a state, choose a subject, enter a raw score, and compare multiple subjects side by side across any state.

Subject Comparison

Disclaimer: Scaling data is approximate. VTAC, UAC, QTAC, TISC, and SATAC/TASC publish varying levels of data. This tool uses the same scaling models as the individual CalcATAR state calculators. State links: VCE | HSC | QCE | WACE | SACE | TCE | BSSS

What Is ATAR Scaling and Why Does It Exist?

ATAR scaling is the statistical process that adjusts your raw subject results so they can be fairly compared across different subjects. Without scaling, a student who scored 80 in Physical Education would appear identical to a student who scored 80 in Chemistry — but the two cohorts are very different, and comparing them directly would be unfair.

Every Australian state’s admissions centre — VTAC in Victoria, UAC in NSW, QTAC in Queensland, TISC in WA, SATAC in SA — applies some form of scaling before calculating your ATAR. The method varies, but the principle is the same: compare how each subject’s students perform across all their other subjects to determine the cohort’s academic strength, then adjust scores accordingly.

Scaling exists to solve one problem: students take different subjects, but universities need a single number to compare all applicants. The ATAR scaling calculator above lets you see exactly how this process affects each of your subjects, across any Australian state.

How Scaling Works: The Cohort Strength Principle

The key to understanding scaling is the concept of cohort strength. Each subject has a group of students (a cohort). If those students tend to perform well in all their other subjects, that cohort is academically strong — and the subject scales up. If the cohort tends to underperform elsewhere, the subject scales down.

Take Specialist Mathematics. The students who choose it are typically the strongest mathematics students in the state, and they also tend to perform very well in Chemistry, Physics, and their other subjects. This tells the admissions centre that the Specialist Maths cohort is academically powerful, so Specialist Maths scores are adjusted upward.

Contrast this with Physical Education. PE attracts a broad range of students, and the average PE student’s performance across their other subjects is lower than the statewide average. This means PE scores are adjusted downward.

Scaling is not about difficulty. Specialist Maths doesn’t scale up because someone decided it’s hard. It scales up because the students who take it happen to be strong across the board. Scaling is a measured observation about a cohort, not a judgment about a subject.

Which Subjects Scale Up Across Australia?

While exact numbers vary by state and year, the same subject categories consistently scale up across all states:

CategoryExamplesWhy They Scale Up
Advanced MathematicsSpecialist Maths, Methods, Extension 2Strongest academic cohort in every state
Physical SciencesPhysics, ChemistrySelf-selecting strong students, maths prerequisites
Languages (LOTE)French, German, Latin, Chinese, JapaneseSmall cohorts of motivated, high-achieving students
EconomicsEconomics (all states)Attracts analytically strong students
Extension CoursesEnglish Extension, Maths Extension (NSW)Self-selecting top performers

Which Subjects Scale Down?

CategoryExamplesWhy They Scale Down
Physical EducationPE, Physical Education Studies, Exercise ScienceLarge, broad cohort with below-average other-subject performance
General/Standard MathsGeneral Maths (VCE/QCE), Maths Standard (NSW), Maths Applications (WA)Broad cohort, less academic self-selection than Advanced
Food/HospitalityFood Studies (VCE), Food Technology (NSW), Food and Hospitality (SACE)Consistently broad cohort
Media/DesignMedia, Design and Technology, Visual CommunicationLower academic self-selection
Applied/Essential subjectsEssential English, Essential Maths, English Studies (NSW)Designed for non-tertiary pathways, very broad cohort

How Scaling Differs by State

Each state uses a slightly different scaling method, but the cohort-strength principle is universal. Here’s how the main systems compare:

Victoria (VCE): VTAC publishes the most detailed scaling data of any state, including a full annual Scaling Report with subject means, standard deviations, and distribution curves. VCE uses cohort-based scaling with study scores out of 50 and a best-4-plus-10% aggregation formula.

NSW (HSC): UAC scales HSC marks using inter-subject comparison, then selects the best 10 units. Extension courses (1 unit each) scale extremely well. UAC publishes Table A3 with average scaled marks per unit for every course.

Queensland (QCE): QTAC uses inter-subject scaling and selects the best 5 General subjects out of 100 each. QTAC publishes Table 6 with percentile data but not full curves. Subjects are scored out of 100 (not 50 like VCE).

Western Australia (WACE): TISC scales with a fixed statewide average of 60, then adds 10% bonuses for LOTE, Maths Methods, and Specialist Maths — a unique feature no other state offers.

South Australia (SACE): SATAC uses the Equal Achievement Principle but publishes the least per-subject data. Best 90 credits form the aggregate (typically 4.5 subjects).

Tasmania (TCE): TASC scales Level 3 pre-tertiary subjects and UTAS builds a TES from the best 5 out of 75 max. TASC publishes award-range data but not full scaling curves.

ACT (BSSS): The ACT uses the AST (a general aptitude test) to moderate school-based assessments across colleges. UAC then converts the aggregate to an ATAR. The ACT publishes the least scaling data of any state.

Common Myths About ATAR Scaling — Debunked

Myth 1: “You should only pick subjects that scale well”

Wrong. A raw 40 in a subject that scales down is almost always worth more than a raw 28 in a subject that scales up. Scaling adjusts your score — but you need a strong score to adjust. Chasing high-scaling subjects you’ll underperform in is the single most common ATAR mistake across all states.

Myth 2: “Scaling penalises easy subjects”

Misleading. Scaling doesn’t judge difficulty. It measures cohort strength. A subject could be genuinely easy but scale up if its cohort happens to be strong across the board. Latin is a good example — it’s a small cohort of very motivated students, regardless of whether the content is easy or hard.

Myth 3: “My raw score goes down because of scaling”

Partially true but misleading. In subjects that scale down, your scaled score will be lower than your raw score. But the scaled score is the fairer representation of your academic standing. A raw 80 in PE represents a different level of achievement from a raw 80 in Physics, and scaling reflects that difference.

Myth 4: “Scaling changes randomly every year”

Mostly false. Scaling patterns are remarkably stable. The same subjects scale up every year, and the same subjects scale down. The magnitude changes slightly as each year’s cohort is different, but the direction almost never flips. Specialist Maths has scaled up every single year in every single state for decades.

The golden rule: Pick subjects you’ll score highest in, that you enjoy, and that meet your university prerequisites. Then use scaling as a tiebreaker between two subjects you’d perform equally well in. Never sacrifice 10 raw marks to chase a 5-point scaling advantage.

Practical Examples: Scaling in Action

These examples use the approximate scaling data from the calculator above. They show why raw performance matters more than scaling:

Example 1 (VCE): A student scores a raw 35 in both Physics and Physical Education. After scaling: Physics scales to approximately 37 (+2), PE scales to about 33 (-2). The gap is only 4 points. But if they had scored raw 40 in PE and raw 30 in Physics (a common pattern when switching to a “harder” subject), PE would scale to about 37 and Physics to about 31. Chasing Physics actually lost 6 net points.

Example 2 (HSC): A student choosing between Mathematics Advanced and Mathematics Standard 2. At a raw mark of 75: Advanced scales to about 79 (+4), Standard 2 scales to about 72 (-3). A 7-point gap. But if the student would score 85 in Standard 2 versus 70 in Advanced: Standard 2 scales to about 81 while Advanced scales to about 73. Standard 2 wins by 8 points despite “scaling down.”

Where Does Scaling Data Come From?

Each state’s admissions centre publishes some form of scaling data, though the detail varies enormously:

  1. VTAC (Victoria): Annual Scaling Report with full per-subject data — the most comprehensive in Australia.
  2. UAC (NSW/ACT): Table A3 in the UAC Scaling Report, showing average scaled marks per unit for every HSC course.
  3. QTAC (Queensland): ATAR Report with Table 6, showing raw and scaled scores at five percentile points per subject.
  4. TISC (Western Australia): Annual TEA/ATAR Summary Table (official) plus limited per-subject scaling data.
  5. SATAC (South Australia): Does not publish official per-subject scaling tables. Approximations only.
  6. TASC (Tasmania): Publishes award-range data per subject but not full scaling curves.
  7. BSSS (ACT): Publishes the least data of any state. No per-subject tables.

The CalcATAR scaling calculator uses data from these official sources where available, and approximate models based on cohort patterns where official data is limited.

Calculate your full ATAR: VCE Calculator | HSC Calculator | QCE Calculator | WACE Calculator | SACE Calculator | TCE Calculator | BSSS Calculator | All States

Frequently Asked Questions About ATAR Scaling

ATAR scaling is a statistical process that adjusts your raw subject scores so results from different subjects can be fairly compared. It accounts for the fact that different subjects attract cohorts of different academic strengths. After scaling, a score in Physics and a score in PE represent comparable levels of achievement relative to the full student population.
Scaling exists because students take different subjects but universities need a single number to compare all applicants. Without scaling, comparing a raw 80 in PE to a raw 80 in Chemistry would be meaningless since the two cohorts have very different academic profiles. Scaling puts every subject on a common scale so the ATAR can fairly rank all students regardless of subject choice.
Across all Australian states, the highest-scaling subjects are consistently Specialist/Extension Mathematics, followed by Physics, Chemistry, Latin, and other LOTE (Language Other Than English) subjects. These subjects attract small, self-selecting cohorts of academically strong students. The exact magnitude varies by state, but the pattern holds everywhere and has for decades.
Subjects that consistently scale down across all states include Physical Education, Food Studies, General/Standard/Applied Mathematics, Media Studies, Outdoor Education, and Essential/Standard English. These subjects tend to have large, broad cohorts where the average student performs below the statewide mean across their other subjects.
No. This is the most common ATAR mistake. A high raw score in a low-scaling subject almost always beats a mediocre score in a high-scaling subject. If you score 85 in PE (scales down) and only 65 in Physics (scales up), the PE result contributes more to your ATAR. Pick subjects you will perform well in and enjoy studying. Use scaling as a tiebreaker only when choosing between two subjects you would perform equally well in.
Not exactly. Scaling measures cohort strength, not subject difficulty. A subject could be genuinely easy but still scale up if its cohort happens to be academically strong in their other subjects. Latin scales very well partly because its tiny cohort consists almost entirely of top students, regardless of how hard or easy the content is. The confusion arises because there is some correlation between perceived difficulty and cohort strength, but they are not the same thing.
VTAC examines how students in each study performed across all their other studies. The process adjusts the mean and spread of each subject’s score distribution. VTAC publishes the most detailed scaling data in Australia through its annual Scaling Report. VCE study scores are out of 50, and the statewide mean for each subject starts at 30 before scaling.
UAC scales HSC marks (out of 100 for 2-unit courses, 50 for extensions) using inter-subject comparison. Scaled marks are reported per unit (out of 50). UAC publishes Table A3 showing the average scaled mark per unit for every course. Extension courses scale particularly well because they attract self-selecting top performers.
QTAC uses inter-subject scaling on QCE results (each out of 100) and selects the best 5 General subject results. QTAC publishes Table 6 with raw and scaled scores at five percentile points for each subject. Scaling in QCE is a curve, not a flat adjustment — the same subject can scale you up at high raw marks and down at low raw marks.
Almost always better to do well in the low-scaling subject. A raw score of 85 in a subject that scales down by 5 still gives a scaled score of about 80. A raw score of 65 in a subject that scales up by 8 gives a scaled score of about 73. The 85 in the low-scaling subject wins by 7 points. The raw score differential usually overwhelms the scaling differential.
Yes, in every state. General Mathematics (VCE), Mathematics Standard 2 (NSW), General Mathematics (QCE), Mathematics Applications (WACE), and their equivalents in other states all scale down. The magnitude varies — in VCE a raw 30 scales to about 28, while in QCE the drop is steeper. If you can realistically handle Mathematical Methods, the scaling upgrade is significant.
Yes, in every state. Physical Education scales down by approximately 2-4 points at the median across all Australian states. In VCE, a raw 30 in PE scales to about 28. In QCE, a raw 80 in PE scales to about 69. However, if PE is a genuine strength and you would score significantly lower in an alternative subject, the raw score advantage may outweigh the scaling penalty.
Yes, consistently across all states. LOTE subjects scale well because they attract small, motivated cohorts of students who tend to perform strongly across all their subjects. In VCE, French and Chinese Second Language scale up by approximately 10-11 points. In NSW, language extension courses average 35+ out of 50 per unit. In WA, LOTE courses attract an additional 10% bonus on top of scaling.
Each state’s admissions centre publishes scaling data annually after results are released. VTAC (Victoria) publishes the most detail. UAC (NSW) publishes average scaled marks per unit. QTAC (Queensland) publishes percentile data. TISC (WA) publishes the TEA/ATAR conversion table. SATAC (SA) and TASC (Tasmania) publish limited data. The BSSS (ACT) publishes the least. All calculators on CalcATAR use these official sources where available.
Scaling data is recalculated every year from each year’s cohort. However, the patterns are remarkably stable. The same subjects scale up every year and the same subjects scale down. The magnitude changes by 1-2 points year to year, but the direction almost never flips. Specialist Mathematics has scaled up in every state every year for as long as data has been published. Use the most recent year’s data for planning, but know the patterns are reliable.