SSC CPO normalisation calculator
SSC CPO is held over several shifts, so raw marks are normalised before the merit list is made. Use this page to understand the idea and to get a rough estimate of what your raw score may become.
It is an estimate, not the official score. The board does not publish a calculator, and the real result depends on score data from every shift that candidates cannot see.
Enter your marks and the shift numbers, or use the sample button, to see the estimate.
How normalisation works
SSC announced in a notice dated 2 June 2025 that it would use the equipercentile method. In simple words: find your percentile within your own shift, then take the marks that the same percentile earns in the other shifts. The idea replaces the older mean and standard deviation approach.
SSC has explained the concept but we could not find a step-by-step formula that anyone can reproduce, so the two modes above are approximations. The percentile table mode follows the equipercentile idea. The mean and SD mode is a quicker bell-curve shortcut that only works when scores are roughly bell-shaped.
Always rely on the marks printed in the official result, and check the official notice for the current rules.
SSC CPO normalisation calculator: FAQs
Why does SSC normalise marks?
The exam runs in several shifts with different question papers. Normalisation adjusts for the difference in difficulty so that candidates are compared fairly.
Which method does SSC use now?
An SSC notice dated 2 June 2025 moved SSC exams to the equipercentile method, where your percentile within your own shift is matched to the same percentile in the other shifts. Check the official notice for the exact rules.
Can this tool give my exact normalised score?
No. SSC has not published a step-by-step worked formula, and the real calculation uses the score distribution of every shift. This tool gives an estimate only.