Subject Selector
Real UAC scaling data · 2023–2025
HSC scaling data, at a glance
Every figure here is real UAC data — cohort size, scaled mean (per unit, out of 50), the 3-year change, % female and the highest ATAR achieved in each course, across 38 NSW HSC subjects. Tap any column to sort. Scaling reflects the strength of the cohort, not how hard a subject is — it’s not an ATAR calculator.
| Subject | Cohort | Scaled mean ▼ | 3-yr change | Stability | % female | Max ATAR |
|---|---|---|---|---|---|---|
| Mathematics Extension 2 | 3,923 | 43.4 /50 | −0.9 | Very stable | 32.9% | 99.95 |
| Latin Continuers | 144 | 40.5 /50 | −0.7 | Very stable | 52.1% | 99.95 |
| Mathematics Extension 1 | 9,821 | 39.7 /50 | −0.5 | Very stable | 39.5% | 99.95 |
| English Extension 1 | 3,702 | 36.1 /50 | −0.2 | Very stable | 73.1% | 99.95 |
| English Extension 2 | 1,427 | 35.8 /50 | −0.5 | Very stable | 76.9% | 99.95 |
| French Continuers | 547 | 34.4 /50 | +0.4 | Very stable | 68.7% | 99.95 |
| Music 2 | 821 | 34.1 /50 | ±0 | Very stable | 47.9% | 99.95 |
| English Advanced | 26,444 | 32.8 /50 | +0.2 | Very stable | 59.5% | 99.95 |
| Chinese Continuers | 336 | 32.8 /50 | +0.4 | Very stable | 58.9% | 99.95 |
| Science Extension | 862 | 32.0 /50 | −0.2 | Very stable | 58.8% | 99.75 |
| Chemistry | 10,552 | 32.0 /50 | +0.3 | Very stable | 48.6% | 99.95 |
| Mathematics Advanced | 17,832 | 31.9 /50 | +0.1 | Very stable | 46.9% | 99.95 |
| Economics | 5,776 | 31.4 /50 | +0.2 | Very stable | 33.8% | 99.95 |
| Physics | 8,900 | 31.0 /50 | +0.1 | Very stable | 23.7% | 99.95 |
| Studies of Religion II | 6,929 | 27.3 /50 | −0.4 | Very stable | 64.0% | 99.85 |
| Software Engineering | 1,844 | 26.7 /50 | +0.3 | Very stable | 12.9% | 99.95 |
| Biology | 21,192 | 26.2 /50 | +0.2 | Very stable | 64.0% | 99.95 |
| Engineering Studies | 2,616 | 26.2 /50 | ±0 | Very stable | 11.9% | 99.8 |
| Legal Studies | 10,289 | 25.3 /50 | +0.2 | Very stable | 63.1% | 99.95 |
| Geography | 4,488 | 25.2 /50 | −0.6 | Very stable | 45.4% | 99.95 |
| Modern History | 11,056 | 25.0 /50 | −0.3 | Very stable | 49.4% | 99.95 |
| Japanese Beginners | 359 | 24.1 /50 | +0.7 | Fairly stable | 53.5% | 99.3 |
| Drama | 3,258 | 24.0 /50 | −0.2 | Very stable | 68.8% | 99.8 |
| Business Studies | 20,817 | 23.9 /50 | +0.3 | Very stable | 44.5% | 99.95 |
| Mathematics Standard 2 | 32,080 | 23.3 /50 | +1.0 | Very stable | 51.6% | 99.85 |
| Society & Culture | 5,037 | 23.1 /50 | −0.3 | Very stable | 81.0% | 99.8 |
| Design & Technology | 4,274 | 23.1 /50 | +0.3 | Very stable | 47.2% | 99.9 |
| PDHPE | 18,085 | 22.8 /50 | +0.1 | Very stable | 54.8% | 99.95 |
| Earth & Environmental Science | 2,733 | 22.8 /50 | +0.3 | Very stable | 49.5% | 99.85 |
| Textiles & Design | 1,494 | 22.8 /50 | −0.2 | Very stable | 94.7% | 99.8 |
| Ancient History | 7,710 | 22.4 /50 | −0.6 | Very stable | 55.7% | 99.85 |
| Visual Arts | 9,166 | 21.7 /50 | −0.1 | Very stable | 74.7% | 99.9 |
| Music 1 | 4,747 | 20.8 /50 | −0.6 | Very stable | 47.5% | 99.9 |
| Investigating Science | 3,564 | 20.5 /50 | +0.4 | Very stable | 44.3% | 99.7 |
| English Standard | 33,973 | 20.4 /50 | +0.5 | Very stable | 49.7% | 99.8 |
| Food Technology | 4,323 | 18.9 /50 | +0.3 | Very stable | 66.5% | 99.15 |
| Community & Family Studies | 9,992 | 18.5 /50 | −0.1 | Very stable | 89.9% | 99.0 |
| Aboriginal Studies | 915 | 14.8 /50 | −0.9 | Very stable | 71.9% | 99.9 |
Not shown: Health and Movement Science — brand-new course whose first HSC cohort hasn’t been scaled yet.
Source: UAC’s Preliminary Report on the Scaling of the 2025 NSW HSC (Tables A1 & A3), with the 2023 and 2024 reports for the trend. Scaled marks are per unit, out of 50. “3-yr change” is the move in scaled mean from 2023 to 2025.