Test Grade Calculator
Calculate your test score percentage based on correct answers out of total questions.
This free online test grade calculator provides instant results with no signup required. All calculations run directly in your browser — your data is never sent to a server. Enter your values below and see results update in real time as you type. Perfect for everyday calculations, homework, or professional use.
Number of questions answered correctly
Total number of questions on the test
Results
Test Score
8400.0%%
Wrong Answers
8
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Test Grade Calculator. Most fields include unit selectors so you can work in your preferred unit system — metric or imperial, whichever matches your problem.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Test Grade Calculator instantly computes the output and displays results with units clearly labeled. All calculations happen in your browser — no loading time and no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
When to Use This Calculator
- •Use the Test Grade Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
- •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
- •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
- •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.
About Test Grade Calculator
The Test Grade Calculator quickly converts your raw test score into a percentage grade. Whether you just finished a quiz, midterm, or standardized test, enter the number of correct answers and total questions to see your percentage score and letter grade equivalent. Teachers can also use this tool to set grading scales and quickly determine student scores.
The Math Behind It
Formula Reference
Test Score Percentage
Score = (Correct / Total) * 100
Variables: Correct = number of correct answers, Total = total number of questions
Worked Examples
Example 1: Simple test grading
A student answers 42 out of 50 questions correctly on a biology quiz.
The student scored 84%, which is a B on the standard grading scale.
Common Mistakes & Tips
- !Entering the number of wrong answers instead of correct answers.
- !Forgetting to account for multi-point questions where individual questions have different point values.
- !Assuming all grading scales use the standard 90/80/70/60 cutoffs when the teacher may use a different scale.
Related Concepts
Used in These Calculators
Calculators that build on or apply the concepts from this page:
Frequently Asked Questions
How do I calculate a test grade with partial credit?
Sum the total points earned (including partial credit) and divide by the total points possible, then multiply by 100. Enter these as your correct and total values.
What letter grade is 84%?
On the standard scale, 84% is a B. On some scales with plus/minus grades, it may be a B or B- depending on the cutoffs used.