Nigeria CGPA to US GPA Converter: 5-Point Scale Guide
A Nigerian 4.50+ CGPA (First Class Honours) converts to a 3.80 to 4.00 US GPA. A Second Class Upper (2:1, 3.50–4.49 CGPA) translates to roughly a 3.30 to 3.70 US GPA. Nigerian universities use the National Universities Commission (NUC) 5.0 scale, where grades are credit-weighted across all semester courses.
Instant Nigeria CGPA to US GPA Calculator
Valid scale range: 0 to 5
•3.50 - 3.99 CGPA maps to 3.30 - 3.45 US GPA
•Meets competitive graduate admission criteria for US universities
Applying to US or Canadian graduate universities? Get your transcripts evaluated by NACES-member agencies with verified GPA equivalents.
ATA-certified official degree and transcript translation for foreign university diplomas, marksheets, and syllabus supplements.
Mathematical Conversion Formula & Parameter Rules
The National Universities Commission (NUC) prescribes a 5-point scale where A=5, B=4, C=3, D=2, E=1 (if applicable), and F=0.
Official Equivalence Table
Updated for 2026 Academic Cycles| Nigerian 5-Point CGPA (NUC Standard) | US 4.0 GPA | Percentage Band | US Letter | Academic Classification |
|---|---|---|---|---|
| 4.50 – 5.00 | 3.80 – 4.00 | 70% – 100% | A / A+ | First Class Honours |
| 4.00 – 4.49 | 3.50 – 3.75 | 65% – 69% | A- | Second Class Upper (High 2:1) |
| 3.50 – 3.99 | 3.30 – 3.49 | 60% – 64% | B+ | Second Class Upper (2:1) |
| 3.00 – 3.49 | 2.80 – 3.19 | 55% – 59% | B | Second Class Lower (High 2:2) |
| 2.40 – 2.99 | 2.40 – 2.79 | 50% – 54% | B- | Second Class Lower (2:2) |
| 1.50 – 2.39 | 2.00 – 2.39 | 45% – 49% | C | Third Class Honours |
| Below 1.50 | 0.00 | < 45% | F | Fail / Pass Degree |
WES & ECE Policies for Nigerian University Transcripts
World Education Services (WES) Methodology
WES requires transcripts from Nigerian universities to be transmitted directly by the institution via electronic delivery (ETX-NG or institutional registrar portal). Standard 4-year and 5-year bachelor degrees from NUC-approved Nigerian universities are evaluated as 4-year US Bachelor degrees.
Educational Credential Evaluators (ECE) Methodology
ECE cross-checks degree recognition with the National Universities Commission (NUC). In evaluating older Nigerian degrees where the pass mark was 40% (E grade), ECE adjusts grade boundaries according to the student’s admitted cohort year.
Key Evaluation Differences & Institutional Practices
- Direct Registrar Transmission: Transcripts delivered by the student are rejected; all official evaluations require verifiable institutional dispatch.
- Degree Duration: 5-year professional engineering/pharmacy programs and 4-year standard science/arts degrees are both evaluated as US bachelor degrees with full credit transfer.
Common Traps & Pitfalls to Avoid
- •Do not calculate GPA by simply dividing your 5.0 CGPA by 5 and multiplying by 4 (e.g. 4.0 / 5 * 4 = 3.2). This compresses your grades unfairly, as 70% is already an A in Nigeria.
- •Check whether your university uses a 5-point, 7-point (e.g. University of Ibadan historically), or 4-point scale.
Worked Transcript Example: University of Lagos (UNILAG) Electrical Engineering Graduate
A 5-year B.Sc. (Eng) graduate with 180 total credit units applying for US graduate studies.
| Subject / Module | Origin Mark | Credits | US Grade Point | Quality Points |
|---|---|---|---|---|
| Control Systems Engineering | A (5.0) | 4 | 4.0 | 16.0 |
| Power Systems Analysis | B (4.0) | 4 | 3.4 | 13.6 |
| Electromagnetic Fields | A (5.0) | 3 | 4.0 | 12.0 |
| Engineering Mathematics V | C (3.0) | 3 | 2.7 | 8.1 |
›Step 1: Check credit unit values under Nigerian university senate guidelines.
›Step 2: Map grades to US equivalents: A (70%+) → 4.0, B (60-69%) → 3.4, C (50-59%) → 2.7.
›Step 3: Quality points = (4×4.0) + (4×3.4) + (3×4.0) + (3×2.7) = 16.0 + 13.6 + 12.0 + 8.1 = 49.7.
›Step 4: Divide by total credit units (14) = 3.55 US GPA.
Frequently Asked Questions
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