How to use the GPA calculator
- Pick each class's letter grade, its credit hours (a typical high-school class is 1 credit; a college class is often 3 or 4) and whether it's honors or AP / IB.
- Check the plus and minus values your school uses. Most use steps of 0.3 (B+ = 3.3); some use thirds (B+ = 3.33).
- Your term GPA updates as you type. Add your earlier GPA and credits to get your cumulative GPA, and use the last section to see what you need next term.
Grade points on the 4.0 scale
| Grade | Points (most schools) | Points (thirds) |
|---|---|---|
| A+ | 4 | 4 |
| A | 4 | 4 |
| A− | 3.7 | 3.67 |
| B+ | 3.3 | 3.33 |
| B | 3 | 3 |
| B− | 2.7 | 2.67 |
| C+ | 2.3 | 2.33 |
| C | 2 | 2 |
| C− | 1.7 | 1.67 |
| D+ | 1.3 | 1.33 |
| D | 1 | 1 |
| D− | 0.7 | 0.67 |
| F | 0 | 0 |
GPA = total quality points ÷ total credits, where quality points = grade points × credits.
Worked example
- English: A (4) × 3 credits = 12 quality points
- Biology (honors): B+ (3.3) × 4 credits = 13.2 quality points
- US History (AP): A− (3.7) × 3 credits = 11.1 quality points
- Spanish: B (3) × 3 credits = 9 quality points
That's 45.3 quality points over 13 credits, so the unweighted GPA is 45.3 ÷ 13 = 3.48. With +0.5 for the honors class and +1.0 for the AP class, the weighted quality points are 50.3 and the weighted GPA is 3.87.
If you had a 3.20 GPA over 60 credits before this term, your cumulative GPA becomes (3.20 × 60 + 45.3) ÷ 73 = 3.25. And to lift a 3.00 GPA over 60 credits to 3.20 with 30 more credits, you need (3.20 × 90 − 3.00 × 60) ÷ 30 = 3.60 on those credits.
Tips
- Pass/fail, withdrawn and audited classes usually don't count towards GPA. Leave their grade empty.
- Some registrars cut GPAs to two decimals instead of rounding (3.4846 becomes 3.48 either way, but 3.479 would show as 3.47), so your transcript may differ by 0.01.
- Colleges often recalculate applicants' GPAs on their own scale, so report the GPA exactly as your transcript shows it.
- Studying in India? Use the CGPA to percentage calculator or the marks percentage calculator.
Grade points checked on 2 October 2026 against Oregon State University's grading system (steps of 0.3) and Portland State University's GPA calculation (thirds); the method follows College Board and university registrars. Honors and AP weights follow common US high-school practice, such as Fairfax County Public Schools. Your school's rules come first.