What is an ATAR calculator?
An ATAR calculator is a planning tool for the Australian Tertiary Admission Rank. ATAR describes a student's relative position; it is not an examination percentage. This page estimates a historical NSW rank from a scaled aggregate, and shows the contribution of the entered course units.
This first version supports NSW. Victoria, Queensland, Western Australia, South Australia, the Northern Territory, Tasmania and the ACT have their own procedures. Do not enter another system's aggregate here.
How to use this ATAR calculator
- Choose scaled course marks or a known NSW scaled aggregate.
- For course entry, provide a unique name, English/other type, correct unit count and scaled mark per unit for every course. Each unit has a maximum of 50.
- Confirm you have separately checked your course eligibility. Enter at least 10 eligible units, including 2 English units.
- Optionally enter a target ATAR between 50 and 99.95.
- Select Calculate. Review the bars, historical bracket and calculation steps. Copy, download or print the result as needed.
Reset clears all marks and results. Editing any field clears the previous answer so it cannot be mistaken for an updated result. The example button fills a sample profile; it does not submit it automatically.
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When planning revision, a student study planner (paid link) can help organize weekly goals. For short recall exercises, blank revision flashcards (paid link) offer a simple way to collect practice questions. A study timer (paid link) can support timed practice. These are optional supplies; buying them does not affect scaling or your ATAR.
How are the aggregate and estimate calculated?
The unit selector reserves the highest-scoring two English units. It then adds the eight strongest remaining units, including any unused English units. A two-unit course contributes twice its per-unit mark if both units count. The total is out of 500. Equal marks are resolved in entry order; that does not change the aggregate.
The rank estimator uses the 2025 column of Table A9 in UAC's preliminary scaling report. That table publishes selected aggregate thresholds, not every possible rank. Between two reference points the calculator uses a straight-line estimate:
The same curve is inverted for a target aggregate. Exact published target ranks use the published threshold. Other targets use interpolation. A displayed estimate rounded to two decimal places does not imply official precision.
Worked ATAR planning example
Enter two units each of English Advanced at 35, Mathematics Advanced at 40, Biology at 32, Chemistry at 38, Physics at 30 and Modern History at 25, all on a scaled per-unit basis. English contributes 70; the best eight other units contribute 80 + 76 + 64 + 60. History contributes zero.
The aggregate is 350.00. The published 2025 reference points are 341.6 at ATAR 85 and 370.7 at ATAR 90. Interpolation gives approximately 86.44, within the 85-to-below-90 reference bracket. A target of 90 corresponds to 370.7, a difference of 20.7 aggregate points. These are planning comparisons, not promised outcomes.
What are the limitations?
Below aggregate 165.7, the result says “below 50 reference range” instead of inventing a rank. At or above 479.4 it shows the historical 99.95 threshold. In the middle, the bracket gives more context than the interpolated number alone.
Course eligibility, exclusions, subject requirements, English extension treatment, accumulated results and satisfactory completion must be checked separately. The course form accepts the units and scaled marks you supply; it cannot validate your official study record. Extra adjustment factors used for a university selection rank are not added to ATAR here.
This tool is independently maintained and is not affiliated with UAC. The data year remains 2025, even when the page is viewed in a later year. Obtain official results and admissions advice from the appropriate admissions authority.
Frequently asked questions about ATAR
Can I enter my HSC marks out of 100?
No. Course mode requires scaled marks out of 50 per unit. HSC marks and scaled marks are different; this tool does not provide a raw-to-scaled conversion.
Is this an official ATAR?
No. It is an independent historical planner using selected 2025 NSW reference points and linear interpolation.
Does this calculate a 2026 ATAR?
No. The reference data is from 2025. A later cohort can have a different aggregate-to-rank relationship.
Does it support VCE, QCE or other states?
No. This version supports NSW only. Do not enter another state’s aggregate.
Why does English count when another mark is higher?
The NSW aggregate reserves the best two English units before adding the strongest eight remaining units.
Can my target include university bonus points?
No. Adjustment factors can affect a university selection rank; they are not extra ATAR points in this calculator.
What if my aggregate is below the published table?
The tool displays below 50 reference range. It does not extrapolate an unsupported exact rank.
Sources and methodology
- UAC 2025 preliminary HSC scaling report — Table A9, page 30, 2025 aggregate thresholds.
- UAC: how your ATAR is calculated — English and remaining-unit aggregation.
- UAC: ATAR eligibility — verify your course pattern separately.
Method reviewed November 12, 2026. Historical reference year: 2025. Interpolation is this tool's approximation, not UAC's official calculation.