ATAR Calculator
Convert an ATAR into a cohort percentile rank, or a target percentile into the indicative ATAR that matches it.
Your ATAR, from 0.00 to 99.95.
You're in the top
15%
Ranked higher than
85%
An ATAR of 85.00 means you ranked higher than approximately 85% of the age cohort — in the top 15%.
This only converts between an ATAR and a percentile rank — it does not predict your ATAR. Your actual ATAR is worked out from your scaled subject results through a confidential process run by your state's tertiary admissions body (UAC, VTAC, QTAC, TISC or SATAC), which no independent site, including this one, can reproduce. For a real indicative estimate from your own results, use your state's official calculator.
Quick answer
An ATAR is a percentile rank, not a mark: an ATAR of 85.00 means you ranked higher than about 85% of your age cohort, putting you in the top 15%. This calculator converts between an ATAR and that percentile in either direction — it explains what an ATAR number means, and cannot predict the ATAR your subject results would earn.
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Browse EducationHow it works
An ATAR (Australian Tertiary Admission Rank) is not a mark out of 100, and it isn’t the percentage of exam questions you answered correctly. It’s a rank — a number from 0.00 to 99.95 that shows where a student’s overall result sits relative to everyone else in their age group across the state, including people who didn’t complete Year 12 at all.
That relationship is exact and works in both directions:
Percentile rank from the top = 100 − ATARAn ATAR of 80.00 means a student’s result was higher than approximately 80% of their age cohort — putting them in the top 20% (100 − 80 = 20). Flip it around and a target of “top 10%” corresponds to an indicative ATAR of 90.00 (100 − 10 = 90). This calculator does that conversion in either direction, instantly, using nothing more than that one definitional relationship.
What this calculator can’t do is tell you the ATAR you’d actually receive from a set of subject results. Producing a real ATAR means scaling every student’s subject marks against the difficulty of that subject and the strength of the group who took it, then combining each student’s best-scaling pattern of study into a single aggregate — a statistical process run each year by the relevant state or territory admissions body (UAC in NSW/ACT, VTAC in VIC, QTAC in QLD, TISC in WA, or SATAC in SA/NT) using scaling tables that aren’t published. No independent calculator, including this one, can reproduce that process. If you want a genuine indicative estimate from your own subject results, use your own state’s official calculator, linked from the UAC ATAR explainer.
Worked example
Amir is in Year 12 at a high school in Sydney, New South Wales. After his HSC exams, UAC scales and combines his subject results and issues him an ATAR of 91.35.
Amir wants to know roughly where that places him among everyone his age across the state. Using the percentile relationship:
Percentile rank from the top = 100 − ATAR
= 100 − 91.35
= 8.65So Amir’s ATAR of 91.35 means he ranked higher than approximately 91.35% of his age cohort in NSW — putting him in about the top 8.65%. Out of a hypothetical 100,000 people in his age group across the state, that’s roughly the top 8,650 — an indicative order of magnitude, not an exact headcount, since the ATAR itself only reports a rank, not the cohort’s precise size.
Amir didn’t get his 91.35 from a formula he could run himself — it came from UAC scaling and combining his HSC results, a process this calculator can’t replicate. What this calculator does show him is what his finished ATAR actually means now that he has it: a percentile position, not a percentage score.
| Value | |
|---|---|
| ATAR received | 91.35 |
| Percentile rank from top (100 − ATAR) | 8.65 |
| Ranked higher than | ≈91.35% of age cohort |
| Position | Top ≈8.65% |
Frequently asked questions
What does my ATAR number actually mean?
Your ATAR is a rank, not a mark out of 100 and not a percentage of questions answered correctly. It shows where your overall Year 12 result sits compared with everyone else in your age group across the state — an ATAR of 70.00 means you're estimated to have ranked higher than about 70% of that age cohort, which is the same as saying you're in the top 30%.
Can this calculator predict my actual ATAR from my subject marks?
No. Working out a real ATAR means scaling every student's subject results against the difficulty of that subject and the strength of the group who studied it, then combining each student's best-scaling subjects into a single aggregate — a confidential statistical process run each year by the relevant state admissions body (UAC, VTAC, QTAC, TISC or SATAC). This calculator only converts between an already-known ATAR and its percentile meaning; for a genuine estimate from your subject marks, use your own state's official calculator.
Why isn't my ATAR just an average of my subject marks?
Because raw marks aren't directly comparable across subjects — a mark in a subject with a strong, high-achieving cohort is treated differently to the same raw mark in a subject with a weaker cohort. Admissions bodies scale marks to account for this before combining them, which is exactly the statistical step this calculator doesn't attempt to reproduce.
Why does the ATAR scale stop at 99.95 instead of 100.00?
There is no ATAR of exactly 100.00 — the scale is capped at 99.95, which is commonly explained as a way of reporting the very top band of results without singling out one individual student as the literal highest rank in the state. Anything above 99.95 is simply reported as 99.95.
Is my ATAR the same as my rank within my own school?
No. Your ATAR compares you with your entire state's age cohort — everyone roughly your age, including people who didn't complete Year 12 at all — not just the other students at your school. That's why a student who topped a small school's Year 12 cohort can still receive a lower ATAR than expected, if the wider age cohort they're actually ranked against performed strongly.
Where can I get a real indicative ATAR estimate from my subject results?
Each state and territory admissions body publishes its own indicative ATAR calculator or estimate tool using results already released to students: UAC for NSW and the ACT, VTAC for Victoria, QTAC for Queensland, TISC for Western Australia, and SATAC for South Australia and the Northern Territory. Those tools have access to the real scaling data this calculator deliberately doesn't attempt to replicate.
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Written and verified by Nirbhay Tripathi
Last updated 18 August 2026
All rates on this page are verified againstUniversities Admissions Centre (UAC) — Understanding the ATARon 18 August 2026. See our methodology for the full update calendar.