Percentile is the proportion of a cohort scoring at or below a given score: (number below ÷ total) × 100. Rank is position within that cohort. Both are meaningless without naming the cohort — a centre percentile and a national percentile are different numbers.
A percentile computed from your own test cannot be presented as a national percentile. The two differ, often substantially.
This is the calculation coaching centres most often misuse, usually not deliberately. A student at the 94th percentile of your Sunday test becomes "94th percentile" on a poster, and the omitted words are doing all the work.
The same score, in three different cohorts.
| Cohort | Size | Candidates below | Percentile |
|---|---|---|---|
| Their batch | 40 | 37 | 92.5 |
| The centre | 400 | 340 | 85.0 |
| The network | 4,000 | 3,120 | 78.0 |
It requires the national cohort, which you do not have. Estimating one from your own centre’s distribution assumes your students are representative of the country, which they are not — that is the entire premise of a coaching centre.
Where a national percentile matters, it comes from the examining body after the actual exam. Anything before that is an estimate and should be labelled as one.
Phrased the way they arrive, answered so each one stands on its own.
Divide the number of candidates scoring below the student by the total in the cohort, and multiply by a hundred. The arithmetic is trivial; naming the cohort is the part that matters.
No. Percentage is the proportion of marks scored; percentile is the proportion of candidates outperformed. A student can score 60% and be at the 95th percentile on a hard paper.
Not reliably. Your students are not a representative sample of the national cohort, which is rather the point of a coaching centre. Treat any such estimate as indicative and label it.
Checked by the Implementations desk on 1 September 2026. Corrections go in the page, dated, rather than quietly.
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