JEE Main Percentile vs Marks, Explained: How NTA Scores Work and How to Estimate Your Rank

How NTA calculates the percentile

JEE Main is held over many shifts, each with a different paper. Some papers turn out harder than others. To be fair, NTA does not compare raw marks across shifts. Instead, within each shift:

Percentile = 100 × (number of candidates in your shift with marks equal to or below yours) ÷ (total candidates in your shift)

So the topper of every shift gets 100 percentile, and everyone else is placed relative to others who sat the same paper. NTA calculates percentiles to seven decimal places, for example 98.7654321, to reduce ties.

Why the same marks give different percentiles

Suppose two students both score 150 out of 300:

• In a hard shift, where most students scored low, 150 might beat 97% of the shift.
• In an easy shift, where many students scored high, 150 might beat only 93%.

The student in the harder shift gets the higher percentile, which is fair: they did better relative to people who faced the same paper. This process is called normalisation.

Percentile is not percentage

• Percentage = your marks ÷ total marks × 100. 150 out of 300 is 50%.
• Percentile = your position among other candidates. 50% marks can be a 95+ percentile in a difficult shift.

That is why a "95 percentile" is a strong result even though it may correspond to well under half the marks.

How to estimate your rank

A rough estimate:

Rank ≈ (100 − percentile) × total number of candidates ÷ 100

For example, if about 12 lakh candidates appear, a 99 percentile suggests roughly (100 − 99) × 12,00,000 ÷ 100 = 12,000, so a rank around 12,000. A 95 percentile suggests a rank around 60,000.

This is only an approximation. The official All India Rank (AIR) comes after both sessions, using the best score and tie-breaking rules, and category ranks are published separately.

Two sessions: which score counts?

Candidates can appear in Session 1 (January) and Session 2 (April). NTA uses the better of your two NTA scores for the final merit list. Many students treat Session 1 as a real attempt and Session 2 as a chance to improve.

What percentile do you need?

• JEE Advanced (for IITs): only about the top 2.5 lakh candidates across categories qualify. The cut-off percentile varies by category and year.
• NITs, IIITs and other central institutes: admission is by rank through JoSAA counselling, and the closing ranks vary widely by institute, branch, state quota and category.
• Eligibility rule: for NITs, IIITs and centrally funded institutes, you also need 75% in Class 12 (65% for SC/ST) or to be in the top 20 percentile of your board.

Use previous years' JoSAA opening and closing ranks, published on the JoSAA website, to see which institutes and branches match your expected rank.

Common mistakes

• Comparing raw marks across shifts. Compare percentiles, not marks.
• Trusting "marks vs percentile" charts as exact. They change with each shift's difficulty.
• Ignoring the Class 12 requirement. A great percentile is not enough without the board eligibility.

Common questions

Can two students have exactly the same percentile? It is rare because of the seven-decimal calculation, but NTA uses tie-breaking rules, such as subject-wise scores, to separate candidates for ranks.

Is the percentile the same as the NTA score? Yes. The "NTA score" on your scorecard is your percentile.

Does negative marking affect the percentile? Indirectly. Negative marks reduce your raw score, which lowers your position in the shift.

Related reading

• JEE Main 2027: Registration and Exam Dates
• Exam Calendar 2027: Board, Engineering, Medical, Law, MBA and UPSC Dates
• CBSE Board Exam 2027: Two Exams for Class 10 and the Date Sheet