Quick Answer
Nigerian universities use both 5.0 and 4.0 GPA scales, depending on the institution. The National Universities Commission (NUC) sets the standard, and most universities follow a 5.0 CGPA system where A = 5.0, B = 4.0, C = 3.0, D = 2.0, E = 1.0, and F = 0.0. Degree classifications on the 5.0 scale are: 4.50–5.00 = First Class, 3.50–4.49 = Second Class Upper (2:1), 2.40–3.49 = Second Class Lower (2:2), 1.50–2.39 = Third Class, and 1.00–1.49 = Pass.
Some institutions use a 4.0 scale where A = 4.0, B = 3.0, C = 2.0, D = 1.0, and F = 0.0. The NUC has guided universities toward a 4-point scale, but the 5-point system remains more common. There is no official Nigeria-to-US GPA conversion table published by any government body — US universities and credential evaluators like WES convert grades individually.
Nigerian Grading Scale at a Glance
- Two systems in use: 5.0 scale (most common) and 4.0 scale (increasingly adopted)
- 5.0 scale grade points: A = 5.0, B = 4.0, C = 3.0, D = 2.0, E = 1.0, F = 0.0
- 4.0 scale grade points: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0
- Degree classifications (5.0 scale): First Class (4.50–5.00), Second Class Upper (3.50–4.49), Second Class Lower (2.40–3.49), Third Class (1.50–2.39), Pass (1.00–1.49)
- Minimum CGPA for graduation: 1.5 (NUC guideline)
- First Class is rare: Less than 5% of Nigerian university graduates achieve a First Class degree
- No official Nigeria-to-US GPA formula — conversions are done by credential evaluators
The 4.0 Scale
Degree Classifications
Grade Lookup Tool
Why No Single GPA Number
A Real US Conversion Example
WES Conversion
Reporting Your GPA
FAQs
Understanding the Nigerian 5.0 GPA Scale
Most Nigerian universities use the 5.0 grading scale, where 5.0 is the highest possible grade point average you can achieve. This system is regulated by the National Universities Commission (NUC), which sets the standard grading guidelines for all Nigerian universities.
The grade points on the 5.0 scale are:
| Percentage Score | Letter Grade | Grade Point (5.0 Scale) | Description |
|---|---|---|---|
| 70 – 100% | A | 5.0 | Excellent |
| 60 – 69% | B | 4.0 | Very Good |
| 50 – 59% | C | 3.0 | Good |
| 45 – 49% | D | 2.0 | Fair |
| 40 – 44% | E | 1.0 | Pass |
| 0 – 39% | F | 0.0 | Fail |
The NUC has expressed a strong recommendation to upgrade passing scores in Nigerian universities to 45% for undergraduate studies, which would phase out 40% as the pass mark. At the postgraduate level, the minimum pass mark is typically 50%.
Good to know: A First Class degree in Nigeria is genuinely rare — less than 5% of Nigerian university graduates finish with a CGPA of 4.50 and above. This makes it a highly prestigious achievement for postgraduate admissions and scholarships.
Understanding the Nigerian 4.0 GPA Scale
Some Nigerian universities use the 4.0 grading scale, which mirrors the US system. The NUC has guided universities toward a standard 4-point scale for newer academic sessions. However, the 5-point system remains more common across Nigerian institutions.
The grade points on the 4.0 scale are:
| Percentage Score | Letter Grade | Grade Point (4.0 Scale) | Description |
|---|---|---|---|
| 70 – 100% | A | 4.0 | Excellent |
| 60 – 69% | B | 3.0 | Very Good |
| 50 – 59% | C | 2.0 | Good |
| 45 – 49% | D | 1.0 | Fair |
| 0 – 44% | F | 0.0 | Fail |
On the 4.0 scale, degree classifications are typically: 3.5–4.0 = First Class Honours, 3.0–3.49 = Second Class Upper, 2.0–2.99 = Second Class Lower, and 1.0–1.99 = Third Class Honours.
📌 Important: Some polytechnics and older transcripts may use a 4.0 scale. Always check your institution’s specific grading system and confirm which scale appears on your transcript.
Degree Classifications on the 5.0 Scale
Nigerian universities classify degrees based on the Cumulative Grade Point Average (CGPA) achieved across all courses. The classifications, as established by the NUC, are:
| CGPA Range (5.0 Scale) | Degree Classification | Approx. US GPA |
|---|---|---|
| 4.50 – 5.00 | First Class Honours | 3.7 – 4.0 |
| 3.50 – 4.49 | Second Class Upper (2:1) | 3.0 – 3.6 |
| 2.40 – 3.49 | Second Class Lower (2:2) | 2.0 – 2.9 |
| 1.50 – 2.39 | Third Class | Below 2.0 |
| 1.00 – 1.49 | Pass | 1.0 |
| Below 1.00 | Fail | 0.0 |
The minimum CGPA for graduation is 1.5 according to NUC guidelines. However, the NUC has also indicated that degrees below Third Class may be discontinued if all universities comply with new regulations.
Nigerian Grade Lookup Tool
This tool shows your grade’s Nigerian letter grade, degree classification, and an approximate US GPA equivalent based on commonly accepted conversion standards. It does not generate an official GPA — see the sections below on why that number can’t be produced by a simple formula, and how to get an official conversion.
Why There’s No Single “Correct” US GPA Number
1. Two Different Scales Are Used
Nigeria uses both 5.0 and 4.0 scales, depending on the institution. Some universities have transitioned from 5.0 to 4.0 following NUC guidance, while others remain on the 5.0 system. A single conversion formula cannot account for both systems.
2. No Official Nigeria-to-US Conversion Authority
There is no official Nigeria-to-US GPA formula published by the Nigerian government, the US Department of Education, or any bilateral agreement. The NUC regulates grading within Nigeria but does not provide conversion to foreign systems.
3. Simple Mathematical Division Is Misleading
A common mistake is trying to convert a 5.0-scale GPA to a 4.0 scale using a simple formula like (Nigerian GPA ÷ 5) × 4. This approach does not reflect how evaluations are actually done and can lead to incorrect assumptions. US universities and credential evaluators consider factors such as course rigor, grading standards, and credit structure.
4. Institution-Specific Charts Vary
Some US universities publish their own conversion charts for Nigerian grades (see the examples below). These are real and usable as reference points, but they apply to that institution’s own grading system — not to every US institution.
Real US Conversion Examples
Different US institutions publish their own conversion charts for Nigerian grades. Here are two examples — planning references only, not universal standards:
Example 1: San Francisco State University
| Nigerian Grade | SFSU US Grade Equivalent |
|---|---|
| 70 – 100 (A/AB) | A |
| 60 – 69 (B/BC) | B+ |
| 50 – 59 (C/CD) | B |
| 45 – 49 (D) | C+ |
| 40 – 44 (E) | C |
| 0 – 39 (F) | F |
Source: San Francisco State University Graduate Division, Admission Requirement Nigeria.
Example 2: UCSB Global (4.0 and 5.0 Scales)
| Nigerian Grade | 4-Point Scale | 5-Point Scale | US Grade |
|---|---|---|---|
| A/AB (70–100) | 4.0 | 5.0 | A |
| A/B (60–69) | 3.5 | 4.0 | B+ |
| B/BC (50–59) | 3.0 | 3.0 | B |
| B/C (45–49) | 2.5 | — | C+ |
| C (40–44) | 2.0 | 2.0 | C |
| F (0–39) | 0.0 | 0.0 | F |
Source: UCSB Global, Nigeria Grading System(s)/Scale(s).
How WES Converts Nigerian Grades
Most US universities, scholarship programs, and immigration processes that require a numeric GPA from a Nigerian transcript point applicants to a NACES-accredited credential evaluation service, most commonly World Education Services (WES). WES evaluates Nigerian credentials by converting each grade individually and weighting the results by credit hours to produce a final GPA.
- Report type: A “Course-by-Course” evaluation — not a basic “Document-by-Document” report — is what produces a converted GPA. Confirm which type your target program requires.
- WES uses a digital platform to authenticate and verify Nigerian academic documents transmitted by applicants.
- Cost and timeline change over time — check wes.org directly for current pricing rather than relying on a fixed figure.
- Authentication: Nigeria is a Hague Apostille Convention member, so Nigerian academic documents can generally be apostilled if a program requires authenticated copies.
- The result from any pre-evaluation calculator, including the one on this page, is a planning estimate only — not an official evaluation.
How to Report Your Nigerian GPA on US Applications
1. Report Your Original Grades First
Don’t self-convert to a 4.0 scale unless the application specifically asks for a US-equivalent GPA. Report your grades exactly as they appear on your transcript — including the scale used (5.0 or 4.0) and your degree classification.
2. Include Your Grading Scale Explanation
Nigerian transcripts often include the grading scale key on the reverse side of the academic record. Include this key or the official grading scale explanation wherever the application allows supporting documents.
3. Get a Formal Evaluation If Required
Many US graduate programs and scholarships — including some competitive, merit-based ones — require a WES or equivalent NACES-member evaluation rather than a self-reported conversion. A Second Class Upper (2:1) degree classification — typically requiring a GPA of 3.5/5.0 or higher — is the primary cutoff for competitive global admissions.
4. Don’t Round Up
If your evaluated GPA falls in a range, report the figure your evaluator actually gives you — not the top of the band.
Converting other grading systems? See these guides:
Frequently Asked Questions
Can I convert my Nigerian grade to a single, official US GPA number?
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What is the minimum passing grade in Nigeria?
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Which scale do Nigerian universities use — 5.0 or 4.0?
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What is a First Class degree in Nigeria?
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Should I convert my Nigerian GPA myself for scholarship applications?
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What GPA do I need for graduate school in the US from Nigeria?
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Christian Chinonso is the founder of LearnViaHub, with 6+ years of research experience in international education, GPA systems, and study-abroad guidance for international students.Christian Chinonso is the founder of LearnViaHub, with 6+ years of research experience in international education — including GPA systems, scholarships, student financing, and study-abroad guidance — for students worldwide.