Test Grade Calculator | Calculate Test Score

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:

Percentage	Letter Grade
90% – 100%	A
80% – 89%	B
70% – 79%	C
60% – 69%	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.

Use the calculator to instantly convert your score into both percentage and letter grade without guessing.

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

• Significant Figures Calculator
• Proportion Calculator
• Mean Median Mode Range Calculator

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.