Post-UTME Aggregate Calculator Composite Screening Score for UNILAG, UI, UNIBEN, LASU, OAU and Federal Institutions

What this calculator does

This tool takes your JAMB UTME score, your Post-UTME CBT mark, and your five best O'Level grades, and returns a single composite number that mirrors the admission screening aggregate your university publishes after Post-UTME. It supports the four screening formulas currently in use across Nigerian federal and state universities, so the same page works whether you are applying to UNILAG, UNIBEN, LASU, or a university that runs an online screening without a written CBT examination.

The arithmetic itself is short. What makes the tool worth a dedicated page is the fact that Nigerian universities do not use a single national formula. Each institution sets its own weighting within the framework published by the National Universities Commission, and the differences between those weightings are large enough to change the outcome for a candidate sitting on the borderline of a competitive course. A candidate who scores 260 in JAMB, 70 in Post-UTME CBT, and five B2 grades in O'Level will produce a different aggregate at UNILAG than at UNIBEN, even though the raw inputs are identical. This calculator makes those differences visible.

Every calculation runs inside your browser. No score, no grade, and no name is uploaded anywhere. If you press the AI insight button, only an anonymous summary of the screening model, the number of O'Level subjects, the composite aggregate, the target course, and the standing band is sent to a small serverless function that runs once and then stops.

How the Post-UTME screening system works in Nigeria

Every year, after the JAMB Unified Tertiary Matriculation Examination (UTME) is written and marked, universities conduct a second screening exercise called Post-UTME. The purpose is straightforward: JAMB produces a national ranking of four-subject marks out of 400, but a university needs a finer instrument for deciding which candidates to admit into which programmes. Post-UTME is that instrument.

The screening takes one of three forms in practice. Some universities run a physical CBT examination on their campus or at designated centres, and the mark from that examination is combined with the JAMB score and O'Level grades. Some universities conduct an online screening where candidates simply upload their O'Level result and their JAMB score, and the university combines those two figures without a written test. A smaller group of universities uses a point-based system where O'Level grades are converted directly to points out of 50, and the total screening score is a percentage that combines JAMB points and O'Level points.

Whatever form the screening takes, the university ends up with a composite score for each candidate, usually expressed as a percentage out of 100. Candidates are then ranked within their chosen course, and offers are extended top-down until the programme quota is filled. The composite score is therefore not just a diagnostic figure; it is the number the admissions office actually uses, and every point matters.

Because the composite is built from three inputs, it is possible to improve it in more than one direction. A strong JAMB score can compensate for a weaker CBT mark. A strong set of O'Level grades can lift a candidate whose CBT was average. Understanding how the weightings work is what allows a candidate to plan effectively, both during the UTME year and during the O'Level examinations that come before it.

The 50:30:20 model in detail

The 50:30:20 model is the most widely used screening formula among first-generation federal universities. UNILAG, UI, and OAU all use a variant of it. The name describes the split: 50 per cent of the final composite comes from JAMB, 30 per cent from the Post-UTME CBT examination, and 20 per cent from the O'Level grades of five relevant subjects.

The JAMB component is calculated by dividing the raw UTME score by 8. A score of 280 out of 400 becomes 35 out of 50. A score of 320 becomes 40 out of 50. This linear compression is why a candidate with a 40-point gap in raw UTME score is only 5 points apart in the composite JAMB contribution; it also means that once a candidate is above the general UTME cutoff, the marginal difference between a good JAMB score and a very good one is smaller than most candidates expect.

The Post-UTME CBT component is calculated by dividing the CBT mark by 100 and multiplying by 30. A CBT mark of 70 becomes 21 out of 30. A CBT mark of 85 becomes 25.5 out of 30. This is the component where candidates can most realistically gain ground, because the range between a weak CBT performance and a strong one is larger in percentage terms than the corresponding range in JAMB. A candidate who works hard on the CBT material can move the aggregate more through this component than through any other.

The O'Level component is calculated by summing the points of five subjects on the standard nine-point scale, where A1 earns 4.0 points, B2 earns 3.6, B3 earns 3.2, C4 earns 2.8, C5 earns 2.4, and C6 earns 2.0. The maximum O'Level contribution is therefore 20 points, achieved with five A1 grades. A candidate with five B3 grades contributes 16 points to the composite, so the range between the best and worst realistic O'Level performance is 4 points out of 100.

The 50:50 model in detail

The 50:50 model is used by a second group of federal universities, including UNIBEN, UNN, FUTO, and DELSU. Under this model the composite is built from only two inputs: JAMB and the Post-UTME CBT mark. O'Level grades serve as a qualifying prerequisite rather than as a scored component, which means a candidate needs five credit passes including English Language and Mathematics, but the exact grades above the credit threshold do not change the composite.

The JAMB component is calculated the same way as in the 50:30:20 model, by dividing the raw score by 8. The CBT component is calculated by dividing the CBT mark by 2. A CBT mark of 70 becomes 35 out of 50. A CBT mark of 85 becomes 42.5 out of 50. The composite is the sum of those two figures, out of a total of 100.

The practical consequence of the 50:50 split is that the CBT examination carries more weight than in any other model. Under 50:30:20, moving your CBT mark from 60 to 80 adds 6 points to the composite. Under 50:50, the same move adds 10 points. A candidate targeting a 50:50 university should therefore treat the Post-UTME CBT preparation with the same seriousness as the original UTME preparation, because the CBT examination can move the composite further than any other single input.

The LASU point grading model

Lagos State University and a small number of other state universities use a point grading model that skips the CBT examination entirely. Under this model, the composite is built from the JAMB score on one side and the O'Level grades on the other, each contributing 50 points.

The JAMB component works the same way as in other models: the raw score is divided by 8, producing a maximum of 50 points. The O'Level component uses a different scale than the one used in the 50:30:20 model. Each of the five subjects is scored out of 10 points, where A1 earns 10, B2 earns 9, B3 earns 8, C4 earns 7, C5 earns 6, and C6 earns 5. Five A1 grades therefore produce 50 O'Level points, and five C6 grades produce 25 points.

The wider range in O'Level scoring is what distinguishes the LASU point model from the others. Under the 50:30:20 model, the entire O'Level contribution range is only 20 points, from 10 to 20. Under the LASU point model, the range is 25 points, from 25 to 50. A candidate with five A1 grades in this model gains 25 composite points over a candidate with five C6 grades, which is a very large swing. O'Level preparation therefore matters much more for a LASU applicant than for a UNILAG applicant, and that difference is worth knowing before the O'Level examinations are written.

The 60:40 screening model

A smaller group of universities, concentrated in the northern and eastern regions, uses a 60:40 split that weights JAMB more heavily than any other model. Under this formula, JAMB contributes 60 points and the Post-UTME CBT contributes 40 points, and O'Level grades serve only as a qualifying prerequisite.

The JAMB component is calculated as the raw score divided by 400 and multiplied by 60. A score of 280 becomes 42 out of 60. A score of 320 becomes 48 out of 60. The CBT component is calculated as the CBT mark divided by 100 and multiplied by 40. A CBT mark of 70 becomes 28 out of 40. A CBT mark of 85 becomes 34 out of 40.

Because JAMB is weighted more heavily here, the 60:40 model rewards candidates who performed strongly in the original UTME examination. A candidate with a 300+ JAMB score who underperformed on the CBT can still hold a strong position in this model, whereas the same candidate would lose ground under the 50:50 split. Conversely, a candidate with a modest JAMB score who performs very well on the CBT cannot close the gap as easily under 60:40 as under 50:50. Matching your personal strengths to the model that rewards them is a legitimate strategic consideration, though of course the model is set by the university and not by the candidate.

How O'Level grades are scored

Every Nigerian university that scores O'Level grades uses the same nine-point scale, though the range the scale is mapped onto differs between models. The grade-to-point conversion is as follows.

The five subjects that matter are not simply the five best grades on the certificate. Universities specify particular subjects for each course. For Medicine and Surgery, the five subjects are almost always English Language, Mathematics, Physics, Chemistry, and Biology. For Engineering, they are English Language, Mathematics, Physics, Chemistry, and either Further Mathematics or a technical subject. For Law, they are English Language, Literature in English, Mathematics, Government or History, and one other. For Accounting, they are English Language, Mathematics, Economics, and two other approved subjects. Always check the exact subject combination for your intended course in the JAMB brochure before assuming that your strongest five grades are the ones that will be scored.

A worked example

Take a candidate applying for Computer Engineering at a university that uses the 50:30:20 model. The candidate's inputs are as follows.

The JAMB contribution is 280 divided by 8, which equals 35.00 out of 50. The CBT contribution is 74 divided by 100 and multiplied by 30, which equals 22.20 out of 30. The O'Level contribution is the sum of the five subject points: A1 (4.0) plus A1 (4.0) plus B2 (3.6) plus B3 (3.2) plus A1 (4.0), which equals 18.80 out of 20. The composite aggregate is 35.00 plus 22.20 plus 18.80, which equals 76.00 out of 100.

Now suppose the same candidate had scored 260 in JAMB instead of 280, all other inputs unchanged. The JAMB contribution would be 260 divided by 8, which equals 32.50. The composite would drop to 73.50. That 2.5-point swing, produced by a 20-point difference in raw UTME score, illustrates how compressed the JAMB contribution is in the 50:30:20 model.

Suppose instead that the candidate had earned five A1 grades in O'Level while keeping the original JAMB score. The O'Level contribution would rise from 18.80 to the maximum of 20.00, and the composite would rise to 77.20. The difference between five B-grades mixed with A-grades and five straight A1 grades is only 1.2 points on the composite, which is a useful reminder that O'Level excellence has a real but bounded effect in this model.

Finally, suppose the candidate had earned a CBT mark of 84 instead of 74, with everything else at the original values. The CBT contribution would rise from 22.20 to 25.20, and the composite would rise to 79.00. A 10-point improvement on the CBT, which is achievable through focused preparation, moves the aggregate by 3 full points, more than the entire range of the O'Level component. This is why CBT preparation is usually the highest-return investment for candidates in this model.

Common mistakes that cost candidates admission

A handful of errors come up repeatedly when candidates try to estimate their own Post-UTME aggregate, and some of them have real consequences for admission.

Using the wrong subject combination. A candidate who scores five A1 grades in subjects that do not match the course requirements will find that the university does not score those subjects at all. The five subjects are set by the university for each course, and substituting a stronger subject for a required but weaker one is not permitted. Read the JAMB brochure for the course before assuming which five grades will count.

Assuming every university uses the same formula. The composite aggregate at UNILAG is not the composite aggregate at UNIBEN, even for identical inputs. A candidate who prepares using one model and applies to a university that uses a different model can badly misjudge their standing. Use the model selector on this page to match the specific university you are applying to.

Neglecting the CBT examination. Under the 50:50 and 60:40 models, the CBT examination carries enough weight to swing the composite by several points. Candidates sometimes treat Post-UTME as a formality after the UTME, only to discover that the CBT mark was the deciding factor in their admission outcome.

Trailing credit passes in core subjects. A credit pass in English Language and Mathematics is a hard prerequisite for every Nigerian university programme. A candidate with five strong grades that do not include English Language or Mathematics, or with a Pass in one of them, will not be considered regardless of the composite aggregate. Fix any gaps through WAEC or NECO resits before the admission window closes.

Ignoring the two-sitting penalty. In models that penalise two sittings, the deduction is small in absolute terms but can matter on a competitive course. If you are close to the merit cutoff and you have two sittings, check the university's current brochure for the exact treatment, and consider whether a resit that consolidates your five credits into one sitting is worth the effort.

Missing the CAPS upload deadline. Even a strong aggregate is forfeited if the O'Level result is not uploaded to JAMB CAPS by the university's stated deadline. Awaiting-result candidates in particular need to upload the moment the result is released, because the deadline is often only days after the result comes out.

Where this calculator stops

This tool estimates the composite Post-UTME aggregate from the inputs you enter, applying the standard screening formulas and the published O'Level point scales used by Nigerian federal and state universities. It does not know the exact cutoff for any particular year, because those are set by each institution after the screening exercise based on the number of applicants and the quality of the pool. It does not know the specific subject combination your chosen course requires, or any special rules your university may apply to two-sitting candidates, transfer students, or candidates applying under catchment or ELDS quotas.

The composite aggregate published in the tool is a planning figure, not an official screening result. The official composite is produced by the university's admissions office using the full record of every candidate who applied, and the merit list that follows is published on the university's portal and on JAMB CAPS. Use this calculator to understand where you stand relative to a reasonable benchmark, to test how a change in one input would move your composite, and to plan your preparation with clearer priorities.

If your composite lands in the same band as the merit cutoff for a competitive course, the difference between admission and rejection can come down to a fraction of a point. In that situation, every input matters, and treating each of JAMB, CBT, and O'Level as a component worth optimising is the realistic path forward.