Knowing how to calculate GPA and CGPA in a higher institution is a must. But first, what is GPA and CGPA? GPA means Grade Point Average. A measure of a student’s academic achievement at a college or university; calculated by dividing the total number of acquired grade points by the total number of Course Unit received. CGPA means Cumulative Grade Point Average
Calculating CGPA may differ. While some higher institutions make use of ABCDEF, others prefer ABCDF. Polytechnics make do with AB BC in their grading. I will make use of ABCDEF on this post
 CU — Means Course Unit
 EXS — Means Exam score
 GD — Means Grading Letter (A, B, C, D, E, F)
 GP — Means Grading Point (5, 4, 3, 2, 1)
 QP — Means Quality Point (CU * GP)
Example:
First Semester 100 Level
Department: Library and Information Science
COURSE NAME  CU  EXS  GD  GP  QP 
LIS 101  2  85  A  5  10 
LIS 102  3  69  C  3  9 
LIS 103  2  75  A  5  10 
LIS 104  2  51  C  3  6 
To calculate GPA, you must sum two important factors in First Semester Table:
 Course Unit for 100 level first Semester 2 + 3 + 2 + 2 = 9
 Quality Point for 100 level first Semester 10 + 9 + 10 + 6 = 35
 To know your GPA, Divide Quality Point by Course Unit. That is, 35 / 9 = 3.888 (Your First Semester GPA)
You cannot get CGPA because we still have one more semester to go
100 level Second Semester
Department: Library and Information Science
COURSE NAME  CU  EXS  GD  GP  QP 
LIS 111  3  85  A  5  15 
LIS 112  3  69  C  3  9 
LIS 113  2  75  A  5  10 
LIS 114  3  51  C  3  9 
 To calculate your GPA, you must sum two important factors in Second Semester table
 Course Unit for 100 level Second Semester 3 + 3 + 2 + 3 = 11
 Quality Point for 100 level Second Semester 15 + 9 + 10 + 9 = 43
 To know your GPA Divide Quality Point by Course Unit 43 / 11 = 3.90909 (Your Second Semester GPA)
———— To Know your 100 level C.G.P.A ————
Remember, Cumulative means – Increasing by successive addition
 Your total Course Unit for 100 first semester and second semester 11 + 9 = 20
 Your total Quality Unit for 100 first semester and second semester 43 + 35 = 78
 Divide your Cumulative Quality point by Cumulative Course Unit.
 That is, 78 / 20 = 3.9 (100 level CGPA)
200 level First Semester
Department: Library and Information Science

 To calculate GPA, you must sum two important factors in 200level First Semester table
 Course Unit for 200 level first Semester 2 + 3 + 2 + 2 = 9
 Quality Point for 200 level first Semester 10 + 9 + 10+ 6 = 35
 To know your GPA, Divide Quality Point by Course Unit. That is, 35 / 9 = 3.8888 (First Semester GPA)
200 level Second Semester
Department: Library and Information Science
COURSE NAME  CU  EXS  GD  GP  QP 
LIS 111  3  85  A  5  15 
LIS 112  3  69  C  3  9 
LIS 113  2  75  A  5  10 
LIS 114  3  51  C  3  9 
 To calculate your GPA, you must sum two important factors in Second Semester table
 Course Unit for 200 level Second Semester 3 + 3 + 2 + 3 = 11
 Quality Point for 200 level Second Semester 15 + 9 + 10 + 9 = 43
 To know your GPA, Divide Quality Point by Course Unit 43 / 11 = 3.90909 (Your Second Semester GPA)
———— To Know your 200 level C.G.P.A ————
Remember, Cumulative means – Increasing by successive addition
 Your total Course Unit for 200 first semester and second semester 11 + 9 = 20
 Your total Quality Unit for 200 first semester and second semester 43 + 35 = 78
 Divide your Cumulative Quality point by Cumulative Course Unit. That is, 78 / 20 = 3.9 (200 level CGPA)
 To know your academic performance from 100 and 200 level;
 Add up all the Course Unit from 100 and 200level (20 + 20 = 40)
 Add up all the Quality Point from 100 and 200level (78 + 78 = 156)
 Your academic performance so far from 100 to 200 level is 3.9
How?
156 / 40 = 3.9 (C.P.G.A of 100 and 200 level)
Use this process to your final year.
…and I wish you well