Check your syllabus cut-offs
Many teachers publish their own bands, and some round up from .5. If yours differ, the grade calculator and letter bands on the syllabus are the authority.
Percentage to GPA calculator
Enter each class as a percentage. Each one is converted to a letter and grade points.
Frequently asked questions
What is 70% in GPA?
On plus/minus bands 70% is a C−, which is 1.7 on the standard 4.0 scale. On ten-point bands (70–79 = C) it is a 2.0.
Is a 3.0 GPA a 75%?
Not exactly. A 3.0 is a B, and on common plus/minus bands a B is 84–86%. A 75% is a C (2.0). The two scales do not map onto each other in a straight line.
How do I convert my percentage average to GPA?
Convert each class separately, then average the grade points — do not convert one overall percentage. Two classes at 89% and 91% average 90%, but they are a B+ (3.3) and an A− (3.7), so the GPA is 3.5.
What is 85% as a GPA?
On plus/minus bands 85% is a B, which is 3.0. On ten-point bands it is also a B, 3.0.
How the conversion works
There is no single formula from percentage to GPA. Each percentage is first placed in a letter-grade band, and the letter then has a grade-point value. The calculator does both steps for each class and weights them by credits.
The four classes above: Biology 92% is an A− (3.7 × 3 credits), History 85% a B (3.0 × 3), Algebra 78% a C+ (2.3 × 4) and Art 97% an A+ (4.0 × 2). That is 37.3 grade points over 12 credits, a GPA of 3.11. Converting the single average percentage instead (86.4%, a B) would give 3.0 — which is why each class is converted separately.
| Percent | Letter |
|---|---|
| 97–100 | A+ |
| 94–96 | A |
| 90–93 | A− |
| 87–89 | B+ |
| 84–86 | B |
| 80–83 | B− |
| 77–79 | C+ |
| 74–76 | C |
| 70–73 | C− |
| 67–69 | D+ |
| 64–66 | D |
| 60–63 | D− |
| Below 60 | F |
Ten-point bands
Some schools use one letter per ten points with no plus or minus. Choose “Ten-point bands” above and every 90–100 becomes an A (4.0), 80–89 a B (3.0), and so on.
| Percent | Letter |
|---|---|
| 90–100 | A |
| 80–89 | B |
| 70–79 | C |
| 60–69 | D |
| Below 60 | F |
International grades
This converts US-style percentages. Grades from other countries use different systems and need a credential evaluation service’s own conversion.
What this calculator assumes
- Plus/minus bands follow The Princeton Review’s published table (97–100 A+, 94–96 A, 90–93 A− …). Ten-point bands are the common 90/80/70/60 split.
- Letters convert to points on the grade scale you pick.
- Percentages are used as entered; rounding (for example 89.5 up to 90) is your school’s policy, not applied here.