RRB Normalization Process 2026: The Railway Recruitment Board (RRB) released the official notification regarding the RRB Normalization Process 2026 on February 10th. The full notice has been released as a PDF on its official website. Officials conduct computer-based tests (CBTs) for recruitment to various posts at different levels of the 7th CPC pay matrix through Centralized Employment Notices (CENs).

Because these exams are conducted in multiple shifts, RRB follows a scientifically designed normalisation method to ensure fairness and transparency. To help candidates understand the entire RRB normalisation process, we've explained everything about the RRB normalisation process in detail below.

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What is the RRB Normalisation Process?

When an exam is conducted in multiple shifts, the difficulty level may vary slightly from one shift to another. To ensure that no candidate is disadvantaged due to a difficult shift, RRB uses a percentile-based normalization method for NTPC, Group D, ALP, and JE. Instead of using raw marks directly, RRB converts them into percentile scores, which are then used to prepare the merit list. This entire process is called the normalisation process.

All interested and eligible candidates can check the detailed RRB Normalization PDF either through the official RRB website or by simply clicking on the direct link shared below:

RRB Normalization 2026 PDF Download Link 

RRB Normalised Marks Calculation Formula:

Let us assume:

  • X = Percentile Score of the candidate

  • N = Normalized Marks

Case 1: If the candidate’s percentile exists in Base Shift

If the same percentile exists in Base Shift, the corresponding marks are directly taken as Normalized Marks.

Case 2: If Percentile is Greater Than or Equal to Minimum Percentile of Base Shift

Interpolation formula used:

Where:

  • X2 = Immediate higher percentile in Base Shift

  • X1 = Immediate lower percentile in Base Shift

  • Y2 = Marks corresponding to X2

  • Y1 = Marks corresponding to X1

Case 3: If Percentile is Less Than Minimum Percentile of Base Shift

Where:

  • X1 = Immediate higher percentile in Base Shift

  • X2 = Next higher percentile

  • Y1, Y2 = Corresponding marks in Base Shift

This mathematical method ensures accurate alignment of marks across shifts.

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Candidates who are willing to appear for the upcoming RRB Recruitment Exam 2026-27 can check the official PDF to have a better understanding of the exam, and always rely on official RRB portals for authentic updates.

NOTICE FOR NORMALIZATION METHODOLOGY FOR ALL CENs.pdf