GPA Calculator for SP, TP, NYP, NP and ITE. Singapore Poly. Temasek Poly. Nanyang Poly. Ngee Ann Poly. Institute of Technical Education. For Republic Poly's students, please download a separate GPA calculator at: or search for "RP Grader". This application is created based on GPA calculation of the school's website. Created for students to gauge their GPA for the semester.