Question 1

How accurate is this HSC ATAR calculator?

Accepted Answer

It's an estimate. We use approximate scaled means from the most recent UAC Report on the Scaling of the NSW HSC and a linear model around the state mean of 75. Real scaling depends on the cohort each year — treat the result as a guide, not a guarantee.

Question 2

How is the ATAR calculated in NSW?

Accepted Answer

UAC scales every HSC subject so marks across different subjects can be compared fairly. Your best 10 scaled units — including 2 units of English — are summed to form an aggregate out of 500. That aggregate is converted to a percentile rank, which becomes your ATAR (0.00–99.95 in steps of 0.05).

Question 3

Which subjects scale the highest?

Accepted Answer

Mathematics Extension 2, English Advanced, Chemistry, Physics, Economics and continuers Languages historically scale well — but only if you do well in them. A high mark in a 'lower scaling' subject almost always beats a low mark in a high-scaling one.

Question 4

Do I need to pick subjects just for scaling?

Accepted Answer

No. The single biggest driver of your ATAR is your actual mark. Choose subjects you're good at and interested in — strong marks scale better than picking a 'hard' subject and struggling.

Question 5

What raw mark do I need for a Band 6?

Accepted Answer

A Band 6 is awarded at 90/100 in HSC exams. Internal assessments contribute to your final HSC mark (50% exam + 50% assessment, moderated against your school's exam performance).

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