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GPA Calculator from Percentage
Your percentage
Your GPA
3.63 / 4.0
Letter grade B · 87%
0.04.0
Letter gradeB
Percentage87%
The calculation
3.0 + (87 − 80) / 10 × 0.9 =
3.63
Example: 87% → 3.63 GPA, letter grade B (B band, 80–89%).
Behind the numbers
How it converts
This calculator uses the common US 4.0 grading scale — GPA is interpolated within each band, so 87% gives a GPA of 3.63, not the band’s flat number:
The formula
GPA = band base + (percentage − band start) / 10 × band step
87% falls in the B band (80–89%): 3.0 + (87 − 80) / 10 × 0.9 = 3.63 GPA.
Reference
Percentage to GPA conversion table
| Percentage | Letter | GPA range |
|---|---|---|
| 90 - 100 | A | 3.90 - 4.00 |
| 80 - 89 | B | 3.00 - 3.90 |
| 70 - 79 | C | 2.00 - 2.90 |
| 60 - 69 | D | 1.00 - 1.90 |
| Below 60 | F | 0.00 - 1.00 |
Note: every university’s scale is slightly different. Check your college’s official conversion chart.
Good to know
FAQ
What GPA is 85%?
On the US 4.0 scale, 85% is generally equal to a 3.45 GPA (B grade) — this calculator interpolates within the band, so 87% gives a GPA of 3.63.
Is this a weighted GPA?
No, this is a simple unweighted conversion. Schools have their own weighting system for honors/AP courses.