Grade Percentage Calculator
Enter your score and the total points to get an instant percentage and letter grade — plus the points-to-percentage formula and a U.S. grade scale.
Enter the points you earned and the total points possible, and this calculator returns your grade as a percentage and a letter grade. It works for a single quiz, an exam, or any assignment scored out of a fixed total.
How to calculate a grade percentage
The percentage is simply points earned divided by points possible, times 100:
For example, scoring 43 out of 50 gives (43 ÷ 50) × 100 = 86%, which is a B on most U.S. grade scales. The letter grade this tool shows uses the common plus/minus scale below — but the exact cutoffs are set by each instructor, so always confirm against your syllabus.
Common U.S. letter-grade cutoffs
| Percentage | Letter | Percentage | Letter |
|---|---|---|---|
| 97–100% | A+ | 73–76% | C |
| 93–96% | A | 70–72% | C- |
| 90–92% | A- | 67–69% | D+ |
| 87–89% | B+ | 63–66% | D |
| 83–86% | B | 60–62% | D- |
| 80–82% | B- | Below 60% | F |
| 77–79% | C+ |
Note: many schools use a simpler 90/80/70/60 scale without plus/minus. Always check your course's official grading policy.
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Last updated 20 June 2026 · By Mustafa Bilgic, editor of Arsenal.College.
Frequently Asked Questions
- How do I convert points to a percentage?
- Divide the points you earned by the total points possible, then multiply by 100. For example, 18 out of 20 is (18 ÷ 20) × 100 = 90%.
- What letter grade is 86%?
- On the standard U.S. plus/minus scale, 86% is a B. On a simple scale without plus/minus grades it would still fall in the B band (80–89%). Confirm the cutoffs with your instructor.
- Does rounding affect my final grade?
- It can. Some instructors round 89.5% up to an A-, others do not. Check your syllabus, and if you are on a borderline, it is worth asking your professor about their rounding policy.