Grade Calculator
Enter your score and total points to instantly find your grade percentage and letter grade.
How grade percentage works
A grade percentage tells you what fraction of the total possible points you earned. Divide your score by the total points available, then multiply by 100.
Example 1 (single test): You scored 42 out of 50 on a quiz. (42 / 50) x 100 = 84%. That is a B on most scales.
Example 2 (weighted average): A test worth 40% of your grade where you scored 78%, and a project worth 60% where you scored 91%. Weighted grade = (0.40 x 78) + (0.60 x 91) = 31.2 + 54.6 = 85.8%.
Standard letter grade scale (US)
| Letter Grade | Percentage Range | GPA (4.0 Scale) |
|---|---|---|
| A+ | 97-100% | 4.0 |
| A | 93-96% | 4.0 |
| A- | 90-92% | 3.7 |
| B+ | 87-89% | 3.3 |
| B | 83-86% | 3.0 |
| B- | 80-82% | 2.7 |
| C+ | 77-79% | 2.3 |
| C | 73-76% | 2.0 |
| C- | 70-72% | 1.7 |
| D+ | 67-69% | 1.3 |
| D | 63-66% | 1.0 |
| D- | 60-62% | 0.7 |
| F | Below 60% | 0.0 |
Scales vary by school and instructor. Always verify the grading scale in your course syllabus.
Weighted vs. unweighted grades
An unweighted average treats all assignments equally. A weighted average gives more important assignments (like finals or major projects) a larger impact on your overall grade. Check your syllabus to know which method your class uses -- the difference can shift your final grade by several percentage points.
When to use the grade calculator
- ✓Checking if you passed a test before official grades are posted
- ✓Calculating your current course grade mid-semester
- ✓Finding out the minimum score you need on a final exam to pass
- ✓Averaging multiple quiz scores to track your progress
- ✓Comparing your performance across different assignments
Why grade calculation feels stressful
Students lose track of their standing in a course gradually -- one quiz at a time, one assignment at a time -- until finals week arrives and the uncertainty peaks at exactly the worst moment. The question "what do I need on the final?" is one of the most anxiety-producing calculations in a student's year, and it is almost always more answerable than it feels.
Weighted grading systems add a layer of confusion that makes the problem worse: different assignments count differently, and a perfect homework score may barely move the needle while a single midterm can shift the grade dramatically. The calculator handles the weights automatically, but understanding the framework helps you use the result strategically.
How to interpret your grade result: a step-by-step framework
- 1List every graded item with its weight from the syllabus: Before entering anything, confirm the weight of each graded category directly from the course syllabus -- not from memory. Weights should add to 100%. If the syllabus lists "tests = 40%, quizzes = 20%, homework = 20%, final exam = 20%," those are the numbers that control how each category affects your grade. A surprise weight change mid-semester is worth clarifying with the instructor.
- 2Convert raw scores to percentages before entering: If you scored 42 out of 50 on a quiz, enter 84% -- not 42. The calculator works with percentage scores. To convert: divide points earned by points possible and multiply by 100. A 34/40 becomes 85%. A 78/90 becomes 86.7%. Do this conversion for every item before entering weights.
- 3Read the weighted average, not a simple average: Your current grade is a weighted average of all scored items -- which means high-weight assignments pull the grade much more than low-weight ones. A 95% homework average barely moves a course where homework is 10% of the grade. A 65% on a midterm worth 30% is a significant drag. Focus your energy on high-weight items.
- 4Use the "what do I need" result to set a concrete study target: The required final exam score tells you exactly what you are working toward. A required score under 75% is generally achievable with focused preparation. A required score between 75-90% is challenging but realistic. A required score above 95% means the target grade may be out of reach -- which is information you need early enough to adjust your target, not find out the night before.
- 5Run this calculation at the semester midpoint, not just finals week: The most strategic time to calculate your grade and required final score is around week 8 of a 15-week course -- when you still have time to raise your standing through assignments, attend office hours, or adjust your target grade realistically. Running it in week 14 gives you the same math with far less time to act on it.
How weighted grading actually works
Most students intuitively add up their grades and divide -- which ignores weights entirely and produces the wrong answer. Here is how weighted grading actually works with a concrete example.
Simple average (wrong method)
Tests: 78%. Homework: 94%. Participation: 100%. Simple average: (78 + 94 + 100) / 3 = 90.7%. This ignores the fact that tests count more.
Weighted average (correct method)
Weights: Tests 50%, Homework 25%, Participation 25%. Weighted grade: (0.50 x 78) + (0.25 x 94) + (0.25 x 100) = 39 + 23.5 + 25 = 87.5%. A full 3 points lower than the simple average -- because the lowest-scoring category carries the most weight.
The practical implication
Knowing weights tells you exactly where to spend your study time. In the example above, every point you gain on a test contributes twice as much to your final grade as a point on homework. Target the high-weight items first.
3 common grade calculation mistakes
What to do next
Use the What Percent Calculator to convert any raw score (e.g., 43/50) to a percentage instantly before entering it here. To see how your grade has trended from assignment to assignment, the Percentage Change Calculator shows improvement or decline as a clear percentage. For a full guide to how GPA is calculated and how your grade percentage converts to a letter grade, read how GPA is calculated step by step.
FAQ
Frequently asked questions
From the blog
All articles →About this calculator
This grade calculator converts a raw score and total points into a percentage and a US letter grade using the formula: Percentage = (Score / Total) x 100. The letter grade scale used (A+ for 97-100, A for 93-96, A- for 90-92, and so on through F below 60) reflects the most widely adopted grading scale in US higher education, consistent with grading policy guidelines published by the American Association of Collegiate Registrars and Admissions Officers (AACRAO).
Note that individual institutions, departments, and instructors may use different cut-off points -- some schools set A at 90, others at 93. Always verify the specific grading rubric in your course syllabus. The scale here is the most common US default and is suitable for quick grade estimation.
This tool is maintained by the MyPctCalculator editorial team. All calculations run locally in your browser; no input data is stored or transmitted.