Using our JEE Marks to Percentile convertor available at: https://engineering.careers360.com/articles/jee-main-marks-vs-percentile , it is estimated that your percentile is between 94-95. Assuming it to be 95 percentile even, your All India Rank is approximately 45000 going by the formula 100-95*869010/100 where in 95 is your percentile and 869010 is the no.of Candidates appearing for the exam. Now going by https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-calicut , with this rank or marks seat in NIT Cal is going to be tough with General Category. You may have to appear for JEE Mains July session. You can prepare for JEE using our Knockout package: https://learn.careers360.com/knockout-jee-main-april/ and also check the list of colleges that you have a shot at using our College predictor: