Hey There, 

Calculating the exact rank for any rank predictor is difficult , the exact results are always by the university. However, there are some rank predictors which give you almost the accurate ranks . You may use the following to get your rank in NCHM JEE 2018:

Https://hospitality.careers360.com/nchmjee-rank-predictor

Thank You

Hi Prodeepta 

See no one can tell you the exact rank according to your mark.But there are some predictions and mostly they works.So here you can see your rank at your marks   https://hospitality.careers360.com/articles/nchm-jee-rank-predictor

Hope you will get your answer 

Thanks for connect with career360

Good luck