Test Grade Calculator
To find your test grade, divide the number you got right by the total questions and multiply by 100. If you got 17 out of 20 right, that is 85%, which is a B on most scales. The calculator above does this for you, and it also shows how many questions you can miss and still hold each letter grade.
Test Grade Calculator helps you quickly find your test score in seconds.
Just enter your total questions and either your correct answers or wrong answers. The tool instantly calculates your percentage score and shows your final grade.
No manual math. No confusion.
This tool is useful for:
- Students checking exam or quiz results
- Teachers calculating grades faster
- Anyone who wants an instant test score
Example:
If you got 18 out of 20 questions correct, the calculator shows 90%, which is typically an A grade.
What Is a Test Grade Calculator?
A Test Grade Calculator is a simple tool that helps you calculate your test score as a percentage.
Instead of doing the math yourself, you just enter your answers and get instant results.
It’s also commonly known as:
- test score calculator
- test grader
- score calculator
The main purpose is to save time and avoid mistakes.
Students use it to quickly check their exam or quiz results.
Teachers use it to grade tests faster and more accurately.
In short, it turns your raw score like “18 out of 20” into a clear result like “90% (A)” in seconds.
How to Calculate Test Grades
You can calculate your test grade using a simple formula.
Basic Formula
The most common way is:
Score (%) = (Correct Answers ÷ Total Questions) × 100
This gives you your percentage score.
Using Wrong Answers
If you know how many questions you got wrong, use this:
Score (%) = ((Total Questions − Wrong Answers) ÷ Total Questions) × 100
This method works the same, just from a different input.
Example Calculation
Let’s say:
- Total questions = 20
- Correct answers = 18
Now apply the formula:
(18 ÷ 20) × 100 = 90%
So your test grade is 90%, which is usually an A.
Test Grade to Letter Grade Chart
Once you have your percentage, the next step is simple.
Convert it into a letter grade.
Here’s the standard grading scale most schools use:
Standard Grading Scale
| Percentage | Letter Grade |
|---|---|
| 90 – 100% | A |
| 80 – 89% | B |
| 70 – 79% | C |
| 60 – 69% | D |
| Below 60% | F |
Many schools use a plus and minus scale instead, which splits each letter into three bands.
| Percentage | Grade |
|---|---|
| 97 – 100% | A+ |
| 93 – 96% | A |
| 90 – 92% | A− |
| 87 – 89% | B+ |
| 83 – 86% | B |
| 80 – 82% | B− |
| 77 – 79% | C+ |
| 73 – 76% | C |
| 70 – 72% | C− |
| 67 – 69% | D+ |
| 63 – 66% | D |
| 60 – 62% | D− |
| Below 60% | F |
Quick Example
If your score is 85%
That falls in the 80–89% range
So your grade is: B
Important Note
Not every school uses the exact same scale.
Some add:
- A+ (above 97%)
- B+ / B− variations
- Custom grading systems
But this chart works for most cases.
How Many Can You Get Wrong and Still Get an A?
It depends on the total, and the answer is often lower than people expect.
| Total questions | Miss this many and still get an A (90%) | Still get a B (80%) |
|---|---|---|
| 10 | 1 | 2 |
| 20 | 2 | 4 |
| 25 | 2 | 5 |
| 30 | 3 | 6 |
| 50 | 5 | 10 |
| 100 | 10 | 20 |
On a 10 question quiz, a single wrong answer drops you to 90%, and two takes you to 80%. Short tests punish mistakes hard, which is why one careless error on a 10 point quiz costs the same as five on a 50 point exam.
Common Grading Systems
Different schools and institutions use different grading systems to evaluate test performance. Understanding these systems helps you interpret your results correctly.
Percentage-Based Grading
This is the most common system.
Your score is shown as a percentage out of 100.
Example:
18 out of 20 = 90%
This system is simple and widely used in schools, colleges, and online tests.
Letter Grading System
In this system, percentages are converted into letter grades.
Common scale:
- A = Excellent
- B = Good
- C = Average
- D = Below Average
- F = Fail
This makes it easier to quickly understand performance without looking at exact numbers.
GPA-Based Grading (Optional)
Some institutions use a GPA (Grade Point Average) system.
Grades are converted into points, such as:
- A = 4.0
- B = 3.0
- C = 2.0
This is mostly used in colleges and universities.
Most test grade calculators focus on percentage and letter grades, since they are the most commonly used systems.
Test Grade Calculator Examples
Here are a few simple examples to help you understand how test grades are calculated.
Example 1: Correct Answers
- Total questions = 20
- Correct answers = 15
Calculation:
(15 ÷ 20) × 100 = 75%
Final grade: 75% (C)
Example 2: Higher Score
- Total questions = 50
- Correct answers = 42
Calculation:
(42 ÷ 50) × 100 = 84%
Final grade: 84% (B)
Example 3: Using Wrong Answers
- Total questions = 25
- Wrong answers = 5
First find correct answers:
25 − 5 = 20
Now calculate:
(20 ÷ 25) × 100 = 80%
Final grade: 80% (B)
These examples show how easy it is to calculate test scores manually.
Or you can use the test grade calculator to get instant results without doing the math.
Try These Calculators Next
Frequently Asked Questions (FAQs)
How to calculate test grade?
Divide the number of correct answers by total questions, then multiply by 100.
For example, 18 out of 20 = (18 ÷ 20) × 100 = 90%.
How to calculate test score percentage?
Use this formula:
Score (%) = (Correct Answers ÷ Total Questions) × 100
This gives your percentage score instantly.
What is a passing test score?
In most cases, a passing score is 60% or higher.
However, this can vary depending on your school or exam system.
How many questions can I miss to get an A?
It depends on total questions.
For example, in a 20-question test, you can usually miss 2 questions to stay at 90% (A).
How do teachers calculate grades?
Teachers divide correct answers by total questions and convert the result into a percentage or letter grade.
Many also use a test grade calculator to speed up the process.