Test Grade Calculator
Enter total questions and wrong answers to instantly see your score percentage, letter grade, and a complete EZ Grader chart for every possible result.
Complete EZ Grader Scoring Chart
Your current score is highlighted. Scroll to see all possible results for this test length.
| Mistakes (Wrong) | Correct Answers | Score (%) | Letter Grade |
|---|
How Test Grading Works: Formula, Letter Grades & Passing Scores
Whether you are a teacher grading a stack of quizzes or a student double-checking your score, the math behind test grading is simple. Here is everything you need to know.
The Test Score Formula
Every test score starts with one simple equation:
Example: 18 out of 20 correct → (18 / 20) x 100 = 90% → Letter Grade: A−
Standard Letter Grade Scale
The most common 10-point scale used across US schools:
| Letter | Range | GPA |
|---|---|---|
| A | 93–100% | 4.0 |
| B | 83–92% | 3.0 |
| C | 73–82% | 2.0 |
| D | 63–72% | 1.0 |
| F | Below 60% | 0.0 |
What Score Is Passing?
The passing threshold depends on your school's policy:
- 60% — Passing at most US high schools (grade D)
- 70% — Required for many college major courses (grade C)
- 75% — Passing threshold in some nursing & health programs
- 65% — Common pass mark in Canadian high schools
Always check your syllabus — some instructors set their own cutoffs.
What Is an EZ Grader Chart?
An EZ Grader (also called a grading scale chart or scoring table) lists every possible score for a test of a given length — from 0 wrong answers to all wrong.
Teachers have used printed EZ Grader wheels for decades to avoid recalculating scores by hand. Our digital version is faster: change the Total Questions number above and the entire chart rebuilds instantly for any test from 1 to 500 questions.
Common Score Quick-Reference Chart
Looking up a specific fraction? Here are the most searched score conversions.
| Score (Fraction) | Percentage | Letter Grade | GPA Points |
|---|---|---|---|
| 20 / 20 | 100% | A+ | 4.0 |
| 18 / 20 | 90% | A− | 3.7 |
| 16 / 20 | 80% | B− | 2.7 |
| 45 / 50 | 90% | A− | 3.7 |
| 38 / 50 | 76% | C+ | 2.3 |
| 40 / 50 | 80% | B− | 2.7 |
| 5 / 8 | 62.5% | D | 1.0 |
| 70 / 100 | 70% | C− | 1.7 |
| 85 / 100 | 85% | B | 3.0 |
| 60 / 100 | 60% | D− | 0.7 |
* Letter grades and GPA values follow the standard US academic scale. Results may vary by institution.
Frequently Asked Questions
How do I calculate a test grade percentage?
Divide correct answers by total questions, then multiply by 100.
Example: 18 out of 20 → (18 / 20) x 100 = 90% → A−
Use the calculator above — type your total questions and wrong answers and results update instantly.
What letter grade is 76%?
On the standard US 10-point grading scale, 76% is a C+ (the C range covers 73–76%). Here is how the neighboring scores map:
- 73–76% → C+ (2.3 GPA)
- 70–72% → C− (1.7 GPA)
- 77–79% → C+ or B− depending on your school's +/− policy
Some schools use a 7-point scale where the cutoffs shift slightly. Always verify with your instructor's syllabus.
What is a passing grade on a test?
Most US schools define passing as 60% or above (a D grade or better). Specific programs often set higher bars:
- High school general courses: 60% (D)
- College core/major courses: 70% (C) — below a C may not fulfill prerequisites
- Nursing & Allied Health: Often 75–80%
- Graduate courses: Often 70–75%
Check your syllabus or institution's academic policy for the exact passing threshold in your course.
How do teachers use an EZ Grader chart?
An EZ Grader chart is a pre-calculated table showing the grade for every possible number of wrong answers on a given test. Instead of doing the division for each student individually, a teacher enters the total number of questions once and the chart handles the rest.
Traditional EZ Grader wheels were sold as physical slide-rule devices for classroom use. Our digital version works the same way: set the Total Questions input above and a full scoring chart is generated instantly — from 0 wrong to all wrong — with percentage scores and letter grades for every row.
Is 5 out of 8 passing on a test?
Yes, in most standard US schools, 5 out of 8 is considered passing.
Calculating 5 out of 8: (5 ÷ 8) × 100 = 62.5%. On the standard 10-point scale, this equals a D letter grade (1.0 GPA).
- Middle & High School: 60% or above is usually passing and earns credit.
- College Major Requirements: Many college courses require at least 70% (a C) to count toward your major or fulfill prerequisites.
Need to Calculate Your Overall Course Grade?
This tool grades individual tests. For your overall class standing, try our other free calculators: