Securing a high score in your Unified Tertiary Matriculation Examination (UTME) is a major milestone, but it is only the first step toward getting admitted into a Nigerian university. To determine who gets admitted into competitive courses like Medicine, Law, Engineering, and Nursing, universities use an Aggregate Score System (often referred to as the Composite Score or Screening Point).
Your aggregate score is a weighted combination of your JAMB UTME score, your Post-UTME examination or screening score, and, in many institutions, your WAEC/NECO O’Level grades.
Because each tertiary institution adopts a distinct scoring formula, calculating your aggregate percentage accurately helps you predict your admission chances before the departmental cut-off marks are officially released.
What Is a University Aggregate Score?
An Aggregate Score is the final percentage rating (usually graded on a scale of 100%) used by tertiary institutions to rank candidates during the admission selection process.
Rather than relying solely on your 400-mark JAMB score, universities combine multiple performance metrics to establish a unified benchmark.
Core Components of the Aggregate Score Formula:
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JAMB UTME Score: Weighted between 50% to 80% depending on the school.
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Post-UTME Exam Score: Written test conducted by the school (where applicable), usually weighted between 30% to 50%.
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O’Level Point Grading: Points awarded for A1, B2, B3, C4, C5, and C6 grades in your 5 core subjects (used primarily by screening-only universities).
The 3 Main Aggregate Calculation Models in Nigeria
Nigerian universities generally fall into three calculation categories:
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50:50 Ratio Model (JAMB + Post-UTME Exam) — Used by schools that conduct computer-based Post-UTME tests (e.g., UNILAG, UNIBEN).
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50:30:20 Ratio Model (JAMB + Post-UTME + O’Level) — Used by schools that factor in O’Level quality points alongside written tests (e.g., OAU, UI).
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50:50 Screening Model (JAMB + O’Level Points Only) — Used by schools that do not write Post-UTME tests and rely on online O’Level verification (e.g., UNN, FUOYE).
1. How to Calculate Aggregate Score for UNILAG (University of Lagos)
UNILAG uses a 100-Point Grading System split into three distinct categories:
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JAMB Score: Scaled to 50%
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Post-UTME Score: Scaled to 30% (30 questions)
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O’Level Results: Scaled to 20% (Top 5 core subjects)
UNILAG O’Level Point Distribution:
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A1 = 4.0 points
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B2 = 3.6 points
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B3 = 3.2 points
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C4 = 2.8 points
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C5 = 2.4 points
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C6 = 2.0 points
The UNILAG Formula:
$$\text{Aggregate} = \left( \frac{\text{JAMB Score}}{8} \right) + \text{Post-UTME Score} + \text{O’Level Points}$$
Plaintext
Step 1: Divide your JAMB Score by 8 (Max = 50)
Step 2: Add your Post-UTME Score directly (Max = 30)
Step 3: Calculate the sum of your 5 core O'Level subjects (Max = 20)
Step 4: Add all three values together.
Practical Example:
A candidate scores 280 in JAMB, 22 out of 30 in UNILAG Post-UTME, and has 5 A1s in their core WAEC subjects.
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JAMB Contribution: $280 \div 8 = 35.0\%$
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Post-UTME Contribution: $22.0\%$
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O’Level Contribution: $5 \times 4.0 = 20.0\%$
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Total UNILAG Aggregate: $35.0 + 22.0 + 20.0 = \mathbf{77.0\%}$
2. How to Calculate Aggregate Score for UI (University of Ibadan)
The University of Ibadan utilizes a 50:50 ratio model derived from your JAMB score and UI Post-UTME CBT score (graded out of 100).
The UI Formula:
$$\text{Aggregate} = \left( \frac{\text{JAMB Score}}{8} \right) + \left( \frac{\text{UI Post-UTME Score}}{2} \right)$$
Practical Example:
A candidate scores 290 in JAMB and 72 in UI Post-UTME Test.
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JAMB Portion: $290 \div 8 = 36.25\%$
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Post-UTME Portion: $72 \div 2 = 36.00\%$
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Total UI Aggregate: $36.25 + 36.00 = \mathbf{72.25\%}$
3. How to Calculate Aggregate Score for UNN (University of Nigeria, Nsukka)
UNN relies on a Screening Model where JAMB carries 60% weight and O’Level results carry 40% weight (or 50:50 depending on the admission cycle year).
UNN O’Level Point Breakdown (Top 5 Core Subjects):
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A1 = 80 points
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B2 = 75 points
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B3 = 70 points
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C4 = 65 points
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C5 = 60 points
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C6 = 55 points
The UNN Formula:
$$\text{JAMB Weight} = \frac{\text{JAMB Score}}{4} \times 0.6$$
$$\text{O’Level Average} = \frac{\text{Sum of 5 Core O’Level Subject Points}}{5}$$
$$\text{O’Level Weight} = \text{O’Level Average} \times 0.4$$
$$\text{Aggregate} = \text{JAMB Weight} + \text{O’Level Weight}$$
Practical Example:
A candidate scores 260 in JAMB. Their 5 O’Level subjects are A1, B2, B3, B3, C4.
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JAMB Calculation: $(260 \div 4) \times 0.6 = 65 \times 0.6 = 39.0\%$
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O’Level Calculation:
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Points: $80 + 75 + 70 + 70 + 65 = 360$
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Average: $360 \div 5 = 72$
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Weighting: $72 \times 0.4 = 28.8\%$
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Total UNN Aggregate: $39.0 + 28.8 = \mathbf{67.8\%}$
4. How to Calculate Aggregate Score for OAU (Obafemi Awolowo University)
OAU evaluates candidates on a 100-point composite scale broken down into:
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JAMB Score: 50%
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O’Level Results: 10%
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Post-UTME Screening/Test: 40%
OAU O’Level Grading Scale (5 Core Subjects):
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A1 = 2.0 points
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B2/B3 = 1.5 points
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C4/C5/C6 = 1.0 point
The OAU Formula:
$$\text{Aggregate} = \left( \frac{\text{JAMB Score}}{8} \right) + \text{O’Level Total Points} + \text{Post-UTME Score}$$
Practical Example:
A candidate has 264 in JAMB, 32 out of 40 in OAU Post-UTME, and 3 A1s and 2 B2s in WAEC.
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JAMB Contribution: $264 \div 8 = 33.0\%$
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O’Level Points: $(3 \times 2.0) + (2 \times 1.5) = 6.0 + 3.0 = 9.0\%$
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Post-UTME Contribution: $32.0\%$
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Total OAU Aggregate: $33.0 + 9.0 + 32.0 = \mathbf{74.0\%}$
5. How to Calculate Aggregate Score for Standard 50:50 Screening Schools
(ABU Zaria, UNIBEN, UNILORIN, UNIPORT, BUK)
Many federal and state institutions convert both your JAMB score and Post-UTME score into percentages and average them evenly.
Standard Formula:
$$\text{JAMB Percentage} = \frac{\text{JAMB Score}}{400} \times 100 = \frac{\text{JAMB Score}}{4}$$
$$\text{Post-UTME Percentage} = \frac{\text{Post-UTME Score}}{\text{Total Post-UTME Marks}} \times 100$$
$$\text{Final Aggregate} = \frac{\text{JAMB Percentage} + \text{Post-UTME Percentage}}{2}$$
Quick Reference Summary Table
| Institution | Formula Model | Key Factors |
| UNILAG | $\frac{\text{JAMB}}{8} + \text{Post-UTME (30)} + \text{O’Level (20)}$ | JAMB, Post-UTME Test, O’Level Quality |
| UI | $\frac{\text{JAMB}}{8} + \frac{\text{Post-UTME (100)}}{2}$ | JAMB, Post-UTME Test |
| UNN | $(\text{JAMB} \times 0.15) + (\text{O’Level Avg} \times 0.4)$ | JAMB, Online O’Level Point System |
| OAU | $\frac{\text{JAMB}}{8} + \text{O’Level (10)} + \text{Post-UTME (40)}$ | JAMB, Post-UTME, 5 Core Subjects |
| UNILORIN | $\left( \frac{\text{JAMB}}{4} + \text{Post-UTME (100)} \right) \div 2$ | Equal 50:50 weighting |
Frequently Asked Questions (FAQs)
Does sitting for O’Level twice affect my aggregate score?
Some institutions (like UNILAG and UI) award full points regardless of whether your results are from one sitting or two sittings. However, other schools (like OAU or selected state universities) deduct 1 to 2 points from your total O’Level score if you present two combined sittings.
What if my university does not conduct a Post-UTME test?
If your institution skips the Post-UTME examination, your aggregate score will be calculated entirely by combining your JAMB Score (scaled to 50% or 60%) with your O’Level Subject Points (scaled to 50% or 40%).
How do I know if my aggregate score meets the departmental cut-off mark?
Once your final aggregate score is calculated, compare it against your university’s official departmental cut-off list released after post-UTME screening. If your score is equal to or higher than the published benchmark for your course, you are eligible for merit admission.