CGPA calculator for Nigerian universities (5-point scale)
This CGPA calculator Nigeria students can use for any semester or for the whole programme: type one course per line with the grade (A to F, or the score out of 100) and its credit units. You get the GPA or CGPA on the 5-point scale, the class of degree it falls into and the full working.
How it is calculated
CGPA = total of (grade point × credit units) ÷ total credit units. On the 5-point scale used by most Nigerian universities an A is worth 5 points and an F is worth 0. A 3-unit course therefore moves your CGPA three times as much as a 1-unit course.
The 5-point grading scale
| Score | Grade | Grade point |
|---|---|---|
| 70–100 | A | 5 |
| 60–69 | B | 4 |
| 50–59 | C | 3 |
| 45–49 | D | 2 |
| 40–44 | E | 1 |
| 0–39 | F | 0 |
How to calculate your CGPA
- Turn each grade into its grade point (A = 5 … F = 0).
- Multiply the grade point by the credit units of the course.
- Add up the results for all courses.
- Divide by the total number of credit units registered – failed courses included.
Example
| Course | Grade | Grade point | Units | Grade point × units |
|---|---|---|---|---|
| MTH 101 | A | 5 | 3 | 15 |
| GST 111 | B | 4 | 2 | 8 |
| PHY 101 | C | 3 | 3 | 9 |
| CHM 101 | B | 4 | 3 | 12 |
| CSC 101 | A | 5 | 2 | 10 |
| BIO 101 | D | 2 | 3 | 6 |
| Total | 16 | 60 |
GPA = 60 ÷ 16 = 3.75, which falls in Second Class Upper. These six courses are preloaded in the calculator.
GPA and CGPA: what is the difference?
The GPA covers one semester; the CGPA covers every semester so far. The formula is identical – only the list of courses differs. For your CGPA, enter the courses of all semesters in one list. Do not average your semester GPAs: a semester with 24 units must weigh more than one with 15.
Class of degree by CGPA
| CGPA | Class of degree |
|---|---|
| 4.50–5.00 | First Class |
| 3.50–4.49 | Second Class Upper |
| 2.40–3.49 | Second Class Lower |
| 1.50–2.39 | Third Class |
This is the classification published by the National Open University of Nigeria; many universities on the 5-point scale use the same bands. Individual universities may add conditions – for example about carry-overs or the minimum units passed – so the calculator shows the band, not a guarantee.
Carry-overs, 4-point scales and other differences
- Failed courses: an F counts as 0 points but its units stay in the total. Enter the failed attempt and, after you retake the course, the new grade as a separate line if your university counts both.
- Other scales: some universities grade on 4 points or without an E. This calculator is for the 5-point scale only.
- Polytechnics: ND and HND programmes are graded on their own scale and are not covered here.
Plan ahead
Add next semester’s courses with the grades you are aiming for and see what they do to your CGPA. The list is saved in the page address, so you can bookmark it, come back after results are released, or share it with a course mate on WhatsApp. For grade point averages on the American 4.0 scale, use the GPA calculator.
Frequently asked questions
How do I calculate my CGPA in a Nigerian university?
Multiply the grade point of every course by its credit units, add the results and divide by the total credit units. Example: an A in a 3-unit course and a C in a 2-unit course give (5 × 3 + 3 × 2) ÷ 5 = 21 ÷ 5 = 4.20.
What CGPA is a First Class?
4.50 to 5.00 on the 5-point scale. Second Class Upper is 3.50 to 4.49, Second Class Lower 2.40 to 3.49 and Third Class 1.50 to 2.39.
What is the highest CGPA in Nigeria?
On the 5-point scale the highest possible CGPA is 5.00 – an A in every course.
What is the grade point of each letter?
A = 5, B = 4, C = 3, D = 2, E = 1 and F = 0. The usual score ranges are 70–100, 60–69, 50–59, 45–49, 40–44 and 0–39.
Can I type scores instead of letter grades?
Yes. A number from 0 to 100 in the grade position is converted to a letter with the ranges above, for example 65 becomes a B.
How do I calculate CGPA from two semester GPAs?
Not by averaging them. Multiply each GPA by the units of its semester, add both and divide by the total units – or simply list all courses of both semesters here.
Does an F reduce my CGPA?
Yes. It adds 0 points but its credit units still count in the total, which pulls the average down until the course is passed.
Does this work for a 4-point scale?
No. Institutions on a 4-point scale use different grade points and class boundaries. This calculator covers the 5-point scale only.
Sources and legal basis
- National Open University of Nigeria: Benchmark Policy on Number of Credit Unit per Semester – 5.0 Cumulative Grade Point Average (CGPA), 6.0 Degree Classification (4.50–5.00 First Class, 3.50–4.49 2nd Class Upper, 2.40–3.49 2nd Class Lower, 1.50–2.39 3rd Class)
- Wikipedia – Academic grading in Nigeria (5-point university scale: A 70–100 = 5, B 60–69 = 4, C 50–59 = 3, D 45–49 = 2, E 40–44 = 1, F 0–39 = 0)
As of: · Editorial policy
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