Dear student,
We cannot predict the difficulty of jee mains for a particular day. But according to the previous years trends we can predict the rank vs marks trends. To achieve a rank under 5000 in obc ncl category you would need around 120-125 marks out of 300 in jee mains. At this score you will get an all India rank if 21000-25000 and your overall percentile would be 97.49 to 97.69. However this trend varies from year to year and depends on various factors like difficulty of the examination, number of students that attempted it, etc. To look at the complete marks vs rank table visit the following link:
https://engineering.careers360.com/articles/jee-main-marks-vs-rank/amp
Our rank predictor tool is as follows:

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