HSC ATAR Calculator

Estimate your ATAR

Enter your HSC subjects and expected marks to estimate your ATAR, or set a target ATAR to see the marks you would need.

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Estimated ATAR

Add at least 10 units of subjects with marks, including English, then press Calculate.

Aggregate: –
Units counted: –

This is an estimate, not your ATAR. Scaling changes every year. Your marks stay on your device: nothing you enter is sent to Cosmos Coaching Centre or anyone else.

How this ATAR calculator works

Your ATAR is a rank, not a mark. UAC turns HSC results into an ATAR in four steps, and this calculator follows the same steps with last year’s published data.

Your position in each course. Your HSC mark is placed against everyone who sat that course, giving a percentile.
A scaled mark. That percentile is converted to a scaled mark out of 50 per unit. Courses whose students do well across all their subjects scale higher.
An aggregate out of 500. Your best 2 units of English are added to your best 8 other units. A course can count in part, and Mathematics Extension 1 counts as 2 units when you also take Extension 2.
Your ATAR. The aggregate is converted to a rank between 0 and 99.95.

What does “ATAR to marks” do?

Set a target ATAR and the calculator finds the marks you’d need if you sat at the same position in every course. If you’re confident of a mark in one subject, type it in to lock it, and the others adjust.