Calculator Wizard
Common Letter Grade Scale
| Percentage | Letter Grade |
|---|---|
| 93–100% | A |
| 90–92% | A− |
| 87–89% | B+ |
| 83–86% | B |
| 80–82% | B− |
| 77–79% | C+ |
| 73–76% | C |
| 70–72% | C− |
| 60–69% | D |
| Below 60% | F |
How Grade Percentages Work
Whether it's a single test, a homework assignment, or a quiz, most grades come down to the same basic percentage calculation: how many points you earned out of how many were possible.
Example: A test worth 80 points
You scored 68 out of 80 possible points.
Step 1: Divide earned by possible → 68 ÷ 80 = 0.85
Step 2: Convert to a percentage → 0.85 × 100 = 85%
Weighted Assignments & Curves
This calculator handles a single assignment or test. If your overall course grade combines several assignments with different weights (say, homework is 20% of your grade and the final exam is 40%), you'll need to calculate each component separately and then combine them according to their weights — a different (though related) calculation from a single grade percentage. If your test used a curve, keep in mind that a curve adjusts the raw percentage afterward, based on the class's overall performance — this calculator gives you the raw, uncurved percentage, and any curve your instructor applies would be layered on top of that.
A single grade percentage typically converts to a letter grade, which then converts to GPA points. If you're trying to work out your overall GPA across multiple classes, see the full guide below for the weighted GPA formula.
Want to calculate your overall GPA across multiple classes?
Read the GPA Guide