Standard percentage-to-GPA conversion
US schools commonly use this 10-point scale to convert percentage grades to letter grades and GPA points:
Converting a percentage grade to GPA uses a standard 10-point scale: 93%+ = A (4.0), 90–92% = A- (3.7), 87–89% = B+ (3.3), and so on. Each letter grade maps to a specific quality-point value.
- Scale type
- 10-point conversion (standard US)
- A (93–100%)
- 4.0 quality points
- B (83–86%)
- 3.0 quality points
- Min passing C (73–76%)
- 2.0 quality points
| Percentage | Letter | GPA |
|---|---|---|
| 93-100% | A | 4.0 |
| 90-92% | A- | 3.7 |
| 87-89% | B+ | 3.3 |
| 83-86% | B | 3.0 |
| 80-82% | B- | 2.7 |
| 77-79% | C+ | 2.3 |
| 73-76% | C | 2.0 |
| 70-72% | C- | 1.7 |
| 67-69% | D+ | 1.3 |
| 65-66% | D | 1.0 |
| below 65% | F | 0.0 |
Some schools use a 7-point scale where 90+ = A. Your school's handbook is authoritative — this is the most common US convention.
International percentage scales
Indian (CBSE/CGPA), UK (degree classification), German (1.0–5.0 inverse), and Chinese (5-point/100-point) systems each use a different mapping. WES (World Education Services) and ECE publish authoritative conversion tables for credential evaluation. For US applications, most admissions offices accept this 10-point conversion as a baseline and re-evaluate from the transcript.
After conversion — what to do with the GPA
Once you have a 4.0-scale GPA, the next move depends on context. College applicants should compare against the unweighted and weighted views — most US schools recalculate to unweighted anyway. Current college students roll the converted GPA into their college GPA on the same 4.0 scale. If you don't have credit hours documented, the GPA Calculator without Credits treats every class equally.
Common conversion mistakes
- Mapping 90% to A (4.0). On the 10-point scale 90–92 = A− (3.7). The 7-point scale gives A; check your school.
- Averaging percentages and converting once. Convert per class, then weight-average — converting an averaged percentage hides class-by-class differences.
- Ignoring credit hours. A 4-credit class's GPA contribution is twice that of a 2-credit elective.
- Converting curved grades. Some courses curve internally — the percentage on file may already reflect that curve, others may not.
Source: NCES — percentage-to-GPA conversion conventions
Source: World Education Services (WES) — international transcript conversion to US 4.0 scale
Source: College Board — how admissions handle percentage-graded transcripts