The ATAR, explained: scaling, study scores & how to lift yours
How the ATAR is actually calculated, what scaling really does, how to choose subjects, and where your next few marks come from — plus a free ATAR calculator.
The ATAR confuses almost everyone — study scores, scaling, aggregates, percentiles. But you can't aim at a target you don't understand, and a few common misconceptions (like dropping a subject because it 'scales down') cost students real marks every year.
This guide explains how the ATAR is actually calculated, what scaling really does, and the levers you can genuinely pull — from subject choice to where your next few marks should come from.
Start with how it's calculated, then use the free ATAR calculator to see how your scores add up and which subject moves your ATAR most.
Know your ATAR levers — for free
Use otto's free ATAR calculator to see how your study scores combine and which subject moves your ATAR most. Then otto helps you lift the scores behind it — finding exactly what to study across every subject and marking your practice like a real qualified assessor.
How the ATAR works
Study scores, scaling and aggregates — explained without the jargon.
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Read guideATAR vs Study Score: What's the Difference?
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Read guideHow VCE Scaling Works (and Why Your Study Score Changes)
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Read guideWhat Is a Good ATAR? A Straight Answer for VCE Students
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Read guideLifting your ATAR
The levers that actually raise your ATAR — and where your next marks are.
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Read guideThe Best Scaling VCE Subjects (and Why Scaling Shouldn't Pick Them)
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Read guideChoosing subjects
How subject choice affects your ATAR — and how many to take.
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The essentials every VCE student should understand early.
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Read guideVCE vs IB: Which Should You Choose?
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Frequently Asked Questions
How is the ATAR calculated?
Your scaled study scores are combined into an aggregate — your best four subjects (including an English) at full weight, plus a 10% contribution from up to two more — and that aggregate is converted to a rank, the ATAR, between 0 and 99.95. It's a rank, not a score: it tells you where you sit relative to other students, not a raw mark.
What is scaling and does it matter which subjects I pick?
Scaling adjusts each subject's scores so that a given level of achievement is comparable across subjects of different difficulty. It matters less than most students think: doing well in a subject you're strong at usually beats struggling in a 'high-scaling' one you dislike. Pick subjects you can score highly in — that's the bigger lever.
What's a good ATAR?
It depends entirely on what you want to do next — many courses need far less than students assume. An ATAR above 80 is higher than most of the cohort, and 90+ opens most courses, but the only ATAR that matters is one that gets you into your pathway. Check the actual requirements for your course.
How can I raise my ATAR?
Focus on your study scores, since the ATAR is built from them: target the specific topics costing you marks, practise past exams to time, and don't neglect a subject just because it 'scales down'. The most reliable lever is lifting the scores in the subjects you're already reasonably good at.
What is a study score?
A study score (out of 50) ranks your performance in a single subject against everyone else who did it that year, based on your SACs and exams. A score of 30 is the median; 40+ puts you in roughly the top 9% of that subject. Scaled study scores are what feed into your ATAR aggregate.