10 highest scaling HSC subjects in 2026 (with UAC data)

This list ranks the top 10 HSC subjects by scaled mean mark per unit, based on the most recent publicly-available UAC scaling data. We use the average over the last 2-3 years where possible to smooth out year-to-year noise.

A note before the list: subject scaling is recalculated each year. The 2026 numbers will only be known after results are released. The ranking below uses 2024 and 2025 reports and is reliable as a guide for choosing subjects for the 2026 HSC, but check UAC's latest report for confirmation closer to results day.

1. Mathematics Extension 2 : ~46/50 mean scaled mark

The highest-scaling HSC subject most years. Mathematics Extension 2 attracts a cohort of about 4,000 students across NSW who are almost all also doing Mathematics Extension 1, Mathematics Advanced, and at least one of Physics or Chemistry. The cohort's overall academic strength is unmatched.

Average scaled mark per unit: approximately 46. About 96% of students who take it have it count in their best 10 units (the highest "success rate" of any HSC subject).

A 70 raw mark in Mathematics Extension 2 typically scales to around 41 scaled marks per unit, which is competitive even before factoring in the extra unit.

2. Latin Continuers / Latin Extension : ~45/50 mean scaled mark

Latin courses are taken by a tiny cohort of typically under 500 students for Continuers and under 100 for Extension. The students who choose Latin tend to be high-performing across the board. Scaling reflects this.

Latin Extension is consistently in the top 3 scaled subjects most years. Often Latin Extension is the highest-scaling subject in any given year.

3. Mathematics Extension 1 : ~42/50 mean scaled mark

The standard university-track maths above Advanced. Most students who take it are also doing Mathematics Advanced and aiming at STEM. About 95% of Extension 1 students have it count in their best 10 units.

A raw mark of 80 in Extension 1 typically scales to 41-43 scaled marks per unit, which materially boosts your aggregate.

4. Classical Greek : ~42-45/50 mean scaled mark

Extremely small cohort (a few dozen students per year). Strong scaling, very limited applicability. Take this if you have access at your school and you are aiming for the highest ATAR brackets and Classics or Ancient History at university.

5. History Extension : ~40-42/50 mean scaled mark

The 1-unit independent research course in history. Strong cohort and high scaling. Take it if you are a strong Modern or Ancient History student and willing to do a 2,500-word original research essay.

6. English Extension 1 : ~40-41/50 mean scaled mark

The 1-unit additional English course taken alongside Advanced. Reading lists are typically demanding (Romanticism, postmodernism, Shakespeare across multiple genres) and require strong critical and analytical writing. Scaling is consistently high.

7. Languages Extension (French, Chinese, German, Japanese, Italian, etc.) : ~40-43/50 mean scaled mark

Extension-level language courses scale very well. They require advanced fluency, sophisticated literary analysis, and often involve oral examinations. Cohorts are tiny (under 100 students for most languages at Extension level).

For students with native or near-native ability in a language, Extension can be a meaningful ATAR boost. For students starting from scratch in Year 11 (Beginners level), the scaling is much lower and the path is harder.

8. Music 2 / Music Extension : ~38-40/50 mean scaled mark

Music 2 is for serious musicians who can perform at advanced level. Music Extension takes selected Music 2 students further. Both scale well because the cohort is small and self-selecting (students who could otherwise be in Music 1 but chose the harder track).

The major work (composition or performance portfolio) requires hundreds of hours over the year.

9. Mathematics Advanced : ~34-35/50 mean scaled mark

The standard university-track maths subject. Notably lower than Extension 1 and Extension 2, but still meaningfully higher than Standard 2. For most students aiming at a high ATAR who can't comfortably do Extension, Mathematics Advanced is the right choice.

A raw mark of 90 in Mathematics Advanced typically scales to about 42-43, comparable to a moderate mark in Extension 1.

10. Chemistry / Physics : ~34-35/50 mean scaled mark

The two most-scaled sciences. Both have strong cohorts (most science students also do Mathematics Advanced or Extension 1) and demanding content. Multi-step problem solving and conceptual understanding are tested in the exam.

Chemistry and Physics are roughly equivalent in scaling most years. Take whichever aligns with your university course (engineering often prefers Physics; medicine and life sciences usually weight both equally).

What scaling does to your ATAR

The ATAR is built from your aggregate of best-10-units scaled marks. A subject that scales to 40 per unit contributes 80 to your aggregate (2 units × 40); one that scales to 30 contributes 60. Over your 10 units, the difference between a high-scaling and low-scaling subject combination is up to 100 aggregate points, which is the difference between an ATAR of 90 and 99+.

But: scaling only helps if you can score competitively in the subject. The decision is not "take the highest-scaling subjects" - it is "take the highest-scaling subjects you can sustain at credit or better."

Subjects that scale poorly (the inverse list)

For context, the lowest-scaling 2-unit HSC subjects most years are:

• Mathematics Standard 2: ~25/50
• English Standard: ~26-27/50
• Personal Development, Health and PE: ~26/50
• Hospitality (VET): ~22-25/50
• Industrial Technology: ~22-24/50

Most of these subjects have value (career relevance, life skills, fit for students not heading to university). But for students aiming at a competitive ATAR, including too many low-scaling subjects in the top 10 units drags the aggregate down meaningfully.

How to apply this list

For students currently in Year 11 making subject choices for Year 12:

1. Identify which high-scaling subjects you could realistically do at credit or above. Talk to your teachers and look at Year 10 / Term 1 marks.
2. Map prerequisites against your target university courses. Some courses require specific subjects (Mathematics Advanced or Chemistry).
3. Include 1-2 high-scaling subjects in your top 10 units if you can do well in them. Don't include subjects you would barely scrape through.
4. For your remaining slots, prioritise subjects you enjoy. A subject you engage with produces a higher raw mark, and the scaling operates on that.

Sources and updates

Scaling data above is drawn from UAC's publicly-released annual scaling reports. UAC publishes a preliminary scaling report and a final scaling report each year; check uac.edu.au for the most recent. We update this page each year after UAC's final report is released.

For the formula behind ATAR aggregates, see our explainer on how the HSC ATAR is calculated. For deeper scaling theory, see how HSC subjects are scaled.

Try the HSC ATAR calculator to estimate your ATAR using different subject mixes and see how scaling changes the result.

In one sentence

The highest-scaling HSC subjects in 2026 are Mathematics Extension 2, Latin, Mathematics Extension 1, Classical Greek, History Extension, English Extension 1, Extension Languages, Music 2/Extension, Mathematics Advanced, and Chemistry/Physics - but scaling only helps if you can perform competitively in the subject's strong cohort.