Nigeria GPA
& grading scale
Quick answer: Nigerian universities use a 5-point grade scale (NUC standard) where 5 is best. Each grade converts to points (A=5, B=4, C=3, D=2, E=1, F=0) and the CGPA is the credit-weighted average. Because it is a 5.0 scale, converting to a US GPA requires rescaling.
Nigeria → US GPA
How the Nigeria grading scale works
Nigerian universities use a 5-point grade scale (NUC standard) where 5 is best. Each grade converts to points (A=5, B=4, C=3, D=2, E=1, F=0) and the CGPA is the credit-weighted average. Because it is a 5.0 scale, converting to a US GPA requires rescaling.
Grade scale
| Grade / range | Meaning (≈ US) |
|---|---|
| 4.50–5.00 (70%+) | First Class (A) |
| 3.50–4.49 (60–69%) | Second Upper 2:1 (B) |
| 2.40–3.49 (50–59%) | Second Lower 2:2 (C) |
| 1.50–2.39 (45–49%) | Third Class (D) |
| Below 1.50 | Fail (F) |
Formula
CGPA = sum(grade point x credit units) / sum(credit units) on a 5.0 max. Credential evaluators map by class band: a Nigerian First Class (4.50+) is treated as a US A (4.0), Second Upper as B, and so on.
Worked example
A CGPA of 4.50/5.00 (First Class) maps to 4.0 (A) on the US 4.0 scale under the band method.
Converting to a US GPA
Enter your grade in the calculator above to estimate the US 4.0 equivalent, and download a PDF that cites the source. You can also use the dedicated Nigeria grade → US GPA converter for credit-weighted results. For a full multi-country matrix use the grade conversion tool.