HSC to ATAR Estimator (Illustrative)
Enter your figures or complete the checklist. Results are planning estimates, not official decisions.
NSW students complete the Higher School Certificate (HSC), and their marks are used to calculate the Australian Tertiary Admission Rank (ATAR). The ATAR is crucial for university entry in Australia, but the conversion from HSC marks to ATAR involves complex scaling that depends on subject difficulty and cohort performance.
This HSC to ATAR Estimator provides an illustrative ATAR band based on your average HSC mark. It's useful for goal-setting and understanding where you might land, but it's not an official ATAR prediction.
How to use this estimator
- Enter your average HSC mark — the average across your best subjects (0–100%).
- Enter the number of units counted — typically 10 units for ATAR calculation.
Enter average HSC mark (0–100 across subjects) for an illustrative ATAR band — not an official ATAR.
Understanding your results
HSC marks are scaled based on subject difficulty before ATAR calculation. High-scaling subjects (like Mathematics Extension 2 or Physics) can boost your ATAR significantly, while low-scaling subjects may reduce it. An average HSC mark of 85+ typically translates to an ATAR above 90, but scaling effects mean this varies.
Frequently asked questions
Generally, an average HSC mark of 85–88 across your counted subjects results in an ATAR around 90. However, this depends heavily on which subjects you take — high-scaling subjects like Maths Extension or Chemistry can boost your ATAR significantly.
HSC scaling adjusts marks based on the relative difficulty of subjects and the caliber of students taking them. Subjects with more high-performing students (like Maths Extension 2) scale up more, while subjects with lower average performance may scale down. The aim is to make marks comparable across different subjects.
Related tools
ATAR ↔ GPA converter
Australian ATAR to US GPA estimate.
NSW selective score estimator
Practice test readiness band.
GPA ↔ percentage converter
US 4.0 scale ↔ percentage grades.
How to interpret the result
Use the result to compare scenarios and identify questions. Schools, universities, testing bodies and government agencies may use different scales, rounding rules and eligibility criteria. An estimate on this page cannot override an official calculation.
Before you decide
- Read the assumptions shown beside the tool.
- Repeat the calculation with a lower and higher scenario.
- Save the official requirement that applies to your case.
- Ask the responsible institution to confirm any conversion in writing.