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Education Australia

ATAR Calculator

Every state publishes how it builds an aggregate from scaled scores, and that arithmetic is computed exactly here. What no state publishes in advance is the scaling itself, or the table that turns an aggregate into a rank — both depend on how this year's cohort performed.

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Enter your unit score out of 50s. These must be scaled scores, not raw marks.

Your aggregate

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Jurisdiction

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Maximum aggregate

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Percentage of maximum

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Scores entered

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Notes

    Can you calculate your ATAR before results?

    Not accurately. The aggregate can be calculated exactly from scaled scores, and this page does that for all five admissions centres. But the rank depends on scaling factors and a conversion table rebuilt each year from the whole cohort's results, neither of which exists until results are released.

    Why we will not hand you a rank

    Most ATAR calculators ask for raw marks and return a confident-looking number to two decimal places. To do that they have to invent two things.

    The first is scaling. A raw study score becomes a scaled score based on the strength of everyone who took that subject that year. Specialist Mathematics scales up because the students who choose it tend to perform strongly across the board — but by exactly how much is not known until results are in.

    The second is the aggregate-to-rank table. An ATAR is a percentile rank, so the same aggregate maps to a different ATAR depending on the whole cohort. Last year's table is a guide, not a prediction.

    A site that fills both gaps with last year's figures and presents the output as “your ATAR” is showing you a plausible number, not a calculated one. We would rather give you the half that is real.

    Historical scaling reports from your admissions centre are genuinely useful for understanding which subjects tend to scale which way. Treat them as context, not as a prediction of your own result.

    What the aggregate is actually good for

    Knowing your aggregate and its maximum tells you where the leverage is, which is more useful than a fake rank.

    In Victoria, the fifth and sixth studies contribute at ten per cent, so effort there moves the aggregate barely at all compared with effort in your top four. In New South Wales, every one of the ten units counts at full weight, so a weak two-unit subject costs proportionally more.

    In Western Australia only four scores count, which makes a fifth subject purely insurance. In Queensland the same logic applies at five.

    That is a study-allocation decision you can act on now, and it does not depend on knowing anybody's scaling factor.

    English is compulsory in the NSW and Victorian aggregates, so it is never a subject to deprioritise in those states regardless of how it scales.

    How this is calculated

    Each admissions centre builds its aggregate differently. All five rules are published and stable.

    • NSW (UAC): best 10 units — 2 units of English compulsory, plus the best 8 remaining, out of 500
    • VIC (VTAC): English + best 3 other scaled study scores + 10% of each of the next 2, out of 210
    • QLD (QTAC): best 5 eligible scaled results, at most 1 Applied and 1 VET, out of 500
    • WA (TISC): the Tertiary Entrance Aggregate is the best 4 scaled course scores, out of 400
    • SA / NT (SATAC): best 90 credits of Stage 2 — 3 full-year subjects plus half of the next 2

    These aggregation rules are the published, stable half of the process. The unpublished half is scaling: how a raw mark in a given subject becomes a scaled score depends on how everybody who sat that subject performed, and it is recalculated every year.

    That is why this tool asks for scaled scores. Feeding it a raw mark will give you an aggregate for a student who does not exist.

    A worked example: a Victorian student

    Scaled study scores of 38 in English, then 42, 40, 35, 33 and 30 in five other studies.

    1. English (compulsory)38
    2. Best 3 others: 42 + 40 + 35117
    3. 10% of the next 2: 33 + 30 = 636.3
    4. Aggregate161.3

    An aggregate of 161.3 out of a possible 210.

    What that converts to as an ATAR depends on VTAC's table for that year. The same 161.3 has mapped to different ranks in different years, which is exactly why this page stops here.

    What this calculator does not do

    • Takes scaled scores only — raw marks will produce a meaningless aggregate
    • Does not convert an aggregate to an ATAR, because that table is published annually after results
    • Does not apply subject scaling, which is not knowable in advance
    • Ignores eligibility rules such as minimum subject counts and English requirements
    • SATAC weighting in particular should be checked against the current published rule

    Common questions

    How is the ATAR calculated?

    Your state builds an aggregate from your scaled scores using a published rule, then converts that aggregate to a percentile rank using a table rebuilt each year from the whole cohort. This page does the first step exactly and stops before the second.

    Can I calculate my ATAR from my raw marks?

    No. Raw marks become scaled scores through a process that depends on how every other student in that subject performed, and those factors do not exist until results are released.

    How many subjects count towards the ATAR?

    Ten units in NSW, six studies at varying weight in Victoria, five in Queensland, four in Western Australia, and the best 90 Stage 2 credits in South Australia and the Northern Territory.

    Does English have to count?

    In New South Wales two units of English are compulsory in the aggregate, and in Victoria an English study is compulsory. The other states handle English as a separate eligibility requirement.

    Why do other ATAR calculators give me a number and this one doesn't?

    Because they use last year's scaling and last year's conversion table and present the result as your ATAR. That is an estimate built on two assumptions, not a calculation.

    Where these numbers come from

    Method last reviewed 2026-10-28 This calculator uses fixed rules rather than rates that change, and its method is re-checked against the sources above at least once a year. Out of date? Tell us and we will fix it.

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