ATAR to IB Score Calculator 2026
Convert your Australian Tertiary Admission Rank (ATAR) to International Baccalaureate (IB) score equivalent using the official 2026 conversion tables.
ATAR to IB Conversion Calculator
Convert your Australian Tertiary Admission Rank to International Baccalaureate equivalent.
RANK
Note: Conversion rates are updated annually based on state-specific tertiary admission center data (UAC/VTAC/QTAC).
What is ATAR to IB Conversion?
The ATAR to IB conversion allows students and universities to understand how Australian Tertiary Admission Ranks compare with International Baccalaureate Diploma scores. While IB students in Australia receive an ATAR equivalent through the IBAS system, this reverse conversion helps contextualize ATAR performance in IB terms.
The ATAR is a percentile ranking system from 0.00 to 99.95, where an ATAR of 90.00 means a student performed better than 90% of their cohort. The IB Diploma is a score-based system out of 45 points, with no theoretical limit on how many students can achieve the maximum score.
ATAR Percentile Rank ≈ IB Score (out of 45)
Based on statistical cohort analysis
Understanding ATAR and IB Systems
ATAR (Australian Tertiary Admission Rank)
- Percentile-based: Shows where a student ranks relative to their age cohort.
- Scale: 0.00 to 99.95 in increments of 0.05.
- Calculation: Based on scaled subject scores from state curricula (HSC, VCE, QCE, WACE, SACE, TCE).
- Distribution: Limited by percentile nature — only top 0.05% achieve 99.95.
- Used for university admission in Australia.
IB Diploma Score
- Score-based: Absolute achievement measure, not relative ranking.
- Scale: 24 to 45 points (24 is minimum for diploma).
- Calculation: 6 subjects (each 1–7) + TOK/EE bonus (0–3).
- Distribution: No cap — theoretically unlimited students can score 45.
- Globally recognized for university admission.
ATAR vs IB: Key Comparison
| Feature | ATAR | IB Diploma |
|---|---|---|
| Measurement Type | Percentile Rank | Absolute Score |
| Range | 0.00 - 99.95 | 24 - 45 points |
| Increment | 0.05 increments | 0.25 increments (IBAS) |
| Geographic Scope | Australia only | International |
| Top Score Distribution | Limited (0.05%) | Unlimited (~2%) |
| Curriculum | State-based (HSC, VCE, etc.) | IBO curriculum |
Complete ATAR to IB Conversion Table 2026
Official reverse conversion table showing IB score equivalents for ATAR ranks:
| ATAR | IB Score (IBAS) | ATAR | IB Score (IBAS) |
|---|---|---|---|
| 99.95 | 45.75 | 99.90 | 45.50 |
| 99.85 | 45.25 | 99.80 | 45.00 |
| 99.75 | 44.75 | 99.70 | 44.50 |
| 99.65 | 44.25 | 99.60 | 44.25 |
| 99.55 | 44.00 | 99.50 | 44.00 |
| 99.45 | 43.75 | 99.40 | 43.75 |
| 99.35 | 43.75 | 99.30 | 43.50 |
| 99.25 | 43.50 | 99.20 | 43.25 |
| 99.15 | 43.25 | 99.10 | 43.25 |
| 99.05 | 43.00 | 99.00 | 43.00 |
| 98.95 | 42.75 | 98.70 | 42.50 |
| 98.50 | 42.00 | 98.45 | 42.00 |
| 98.20 | 41.75 | 98.00 | 41.50 |
| 97.95 | 41.25 | 97.70 | 41.00 |
| 97.50 | 40.75 | 97.45 | 40.50 |
| 97.20 | 40.25 | 97.00 | 40.00 |
| 96.95 | 39.75 | 96.70 | 39.50 |
| 96.50 | 39.25 | 96.45 | 39.00 |
| 96.20 | 38.75 | 96.00 | 38.50 |
| 95.95 | 38.50 | 95.70 | 38.00 |
| 95.50 | 37.75 | 95.45 | 37.50 |
| 95.20 | 37.25 | 95.00 | 37.00 |
| 94.95 | 36.75 | 94.70 | 36.50 |
| 94.50 | 36.25 | 94.45 | 36.00 |
| 94.20 | 35.75 | 94.00 | 35.50 |
| 93.95 | 35.50 | 93.70 | 35.00 |
| 93.50 | 34.75 | 93.45 | 34.75 |
| 93.20 | 34.25 | 93.00 | 34.00 |
| 92.95 | 34.00 | 92.70 | 33.50 |
| 92.50 | 33.25 | 92.45 | 33.25 |
| 92.20 | 32.75 | 92.00 | 32.50 |
| 91.95 | 32.50 | 91.70 | 32.00 |
| 91.50 | 31.75 | 91.45 | 31.75 |
| 91.20 | 31.25 | 91.00 | 31.00 |
| 90.95 | 31.00 | 90.70 | 30.50 |
| 90.50 | 30.25 | 90.45 | 30.25 |
| 90.20 | 29.75 | 90.00 | 29.75 |
| 89.50 | 29.50 | 89.00 | 29.00 |
| 88.50 | 28.50 | 88.00 | 28.00 |
| 87.50 | 27.50 | 87.00 | 27.00 |
| 86.50 | 26.75 | 86.00 | 26.50 |
| 85.50 | 26.25 | 85.00 | 26.00 |
| 84.50 | 25.75 | 84.00 | 25.50 |
| 83.50 | 25.25 | 83.00 | 25.00 |
| 82.50 | 24.75 | 82.00 | 24.50 |
| 81.50 | 24.25 | 81.00 | 24.25 |
| 80.50 | 24.00 | 80.00 | 24.00 |
| 75.00 | 24.00 | 70.00 | 24.00 |
| 65.00 | 24.00 | - | - |
Notable ATAR to IB Conversions 2026
99.95
= 45.50 - 45.75 IB
Top ATAR rank
99.00
= 43.00 - 43.25 IB
Exceptional performance
95.00
= 38.75 IB
Very high achievement
90.00
= 35.50 - 35.75 IB
Strong performance
80.00
= 30.25 - 30.50 IB
Above average
70.00
= 26.25 - 26.50 IB
Average performance
Frequently Ask Question
How the Conversion is Calculated
The ATAR to IB conversion is established through statistical cohort analysis conducted annually by tertiary admission centers:
Conversion Methodology:
- Cohort Comparison: Compare performance distributions of ATAR and IB students over multiple years
- Percentile Matching: Identify which IB scores correspond to specific ATAR percentiles
- Statistical Analysis: Use regression and distribution modeling to establish equivalencies
- Historical Validation: Verify conversions against university performance data
- Annual Updates: Refine tables each year based on new cohort data
Note: The conversion attempts to match achievement levels, but the fundamental difference between percentile ranking (ATAR) and absolute scoring (IB) means perfect equivalence is impossible.
When to Use ATAR to IB Conversion
International Applications
Understanding how your ATAR compares globally when applying to international universities
System Comparison
Contextualizing ATAR achievement relative to IB standards for scholarship or program requirements
Academic Planning
Understanding relative achievement when researching alternative education pathways
Research & Analysis
Educational research comparing outcomes across different qualification systems
ATAR Score Ranges & IB Equivalents
| ATAR Range | IB Equivalent | Performance Level |
|---|---|---|
| 99.00 - 99.95 | 43.00 - 45.75 | Exceptional (Top 1%) |
| 95.00 - 98.99 | 38.50 - 42.75 | Outstanding (Top 5%) |
| 90.00 - 94.99 | 35.50 - 38.25 | Excellent (Top 10%) |
| 80.00 - 89.99 | 30.25 - 35.25 | Very Good (Top 20%) |
| 70.00 - 79.99 | 26.25 - 30.00 | Good (Top 30%) |
| Below 70.00 | 24.00 - 26.00 | Satisfactory |
Important Considerations
- This conversion is for reference only — not for official university applications
- ATAR students applying to international universities should submit their actual ATAR score
- Some universities may have their own conversion methodologies
- The conversion reflects statistical equivalence, not curriculum or assessment similarity
- Conversions are updated annually based on cohort performance data
- Individual subject performance may vary significantly from overall score equivalence
- For official conversions, always consult UAC, VTAC, QTAC, TISC, or the relevant admission body