Free tool · New South Wales · UAC
HSC ATAR Calculator: Marks to a UAC Rank
Estimate an indicative ATAR from your expected HSC results on the 0.00 to 99.95 scale. It is a study-planning guide, not a prediction, and it is never the official figure. Only UAC issues your real ATAR in New South Wales.
Read this before you type. The estimator below runs on a 0 to 50 per-unit scale and uses a Victorian-style aggregate under the hood. For a standard 2-unit HSC course, enter half your expected course mark out of 100 as a rough per-unit figure. It does not reproduce UAC's best-10-units method or UAC's scaling, so read the output as a wide indicative band only.
Estimate your ATAR
Enter your expected VCE study score (out of 50) for each subject, and mark which one is your English study. Indicative estimate only — not your real ATAR.
How the New South Wales ATAR is actually worked out
NESA and UAC do different jobs. NESA writes the Stage 6 syllabuses, sets and marks the written HSC examinations, and reports an HSC mark for each course. That mark averages your examination mark with your school assessment mark, after NESA moderates school assessments against exam performance so that marks mean the same thing across schools.
UAC then does the ranking. It scales each course, adjusting for how the students who took that course performed across everything else they sat, so a mark in one course counts comparably with a mark in another. Scaling describes the strength of a course's candidature, not how difficult the course felt to sit.
The aggregate is built from your best 10 units of scaled marks: two units of English, which always count, plus your best eight remaining units from ATAR-eligible Board Developed courses, with a limit of two units from Category B courses. Each unit contributes up to 50 scaled marks, giving an aggregate out of 500. UAC ranks those aggregates against the whole NSW age cohort and reports the ATAR from 99.95 downwards in steps of 0.05, with anything under 30.00 reported as “less than 30”.
The scaling used for any given year is published by UAC only after results are finalised, so no calculator can reproduce it in advance. See how the ATAR is calculated for the whole chain.
How to use the HSC calculator
- List the ATAR-eligible HSC courses you are sitting, and remember that two units of English always count in the New South Wales aggregate.
- Work out an expected mark per unit out of 50 for each course, which for a standard 2-unit course is half your expected course mark out of 100.
- Enter one row per course, using that per-unit figure, and select the radio button next to your English course so it is always included.
- Press calculate. The tool applies a general scaling nudge and returns an indicative rank with a rough range around it.
- Treat the range as the answer, not the midpoint, then adjust one course at a time to see which unit block moves your estimate most.
- Drill the weakest course it flags with full-length timed papers marked against a proper marking guide.
HSC ATAR calculator FAQs
How does UAC calculate the HSC ATAR?
NESA reports an HSC mark for each course, combining your examination mark with your moderated school assessment mark. UAC then scales each course and adds up your best 10 units of scaled marks: two units of English plus your best eight remaining units, with no more than two units from Category B courses. That aggregate is ranked against your age cohort to produce the ATAR.
Is an HSC mark the same as an ATAR?
No. An HSC mark is a mark in one course, reported out of 100 for a 2-unit course and placed in a performance band. The ATAR is a single rank across every ATAR-eligible student in New South Wales, built from scaled marks rather than the HSC marks you see on your results notice. A band 6 in one course does not translate directly into any particular ATAR.
Do all my HSC courses count towards the ATAR?
No. Only your best 10 units count, and they must come from ATAR-eligible Board Developed courses. Two units of English are always included even if English is not among your strongest results, and at most two units of Category B courses can contribute. Extra courses beyond that simply do not enter the aggregate.
Does this HSC ATAR calculator use the real UAC scaling?
No, and no public tool can. UAC recalculates scaling for every course each year once results are in, and the year-specific figures are not released in advance. This estimator applies a general scaling direction on a per-unit 0 to 50 scale, so the result is a planning aid only. Confirm the method against UAC's published Report on the Scaling of the HSC.
Where to next
The estimate is only worth as much as the marks you feed it, and marks move with timed practice. Every HSC subject hub has 20 full-length model papers with mark-by-mark answer guides, revision notes and flashcards.
Sitting a different curriculum? Use the VCE ATAR calculator for Victoria or the QCE ATAR calculator for Queensland.
Important disclaimer
This HSC ATAR calculator gives an indicative estimate only. It is a study-planning tool, not a prediction, and the number it produces is not your ATAR. Real ATARs are calculated and issued solely by UAC in New South Wales, using the official scaling for your year, which is not public in advance and changes every cycle.
ATARMAxxing is an independent Australian study platform. It is not affiliated with, authorised by, or endorsed by UAC, VTAC, QTAC, NESA, the VCAA or the QCAA. We make no guarantee of any ATAR, mark or band, and we do not claim any result. Always confirm how the ATAR works against the official UAC and NESA sources before making study or course decisions.