ATAR Calculator Formula
The ATAR Calculator formula calculates estimate an Australian Tertiary Admission Rank from an aggregate of scaled subject scores using a percentile curve approximation.
This formula is used because it connects the main inputs directly to the result people need.
It keeps the work clear, so you can change one value and see how the answer moves.
ATAR is a rank, not a mark. It reports where a student sits relative to their age cohort, so 80.00 means roughly the top 20 percent. Each state's admissions centre applies confidential subject scaling before producing an aggregate, which is why an estimator can only approximate the curve rather than reproduce the official result.