EDUCATION CALCULATOR
Test Grade Calculator
Calculate your test percentage and letter grade from the number of questions you answered correctly.
How Does the Test Grade Calculator Work?
Enter the number of questions you answered correctly and the total number of questions on the test. The calculator converts your score into a percentage and letter grade.
Test Grade Formula
The percentage is calculated using:
Test Grade = (Correct Answers ÷ Total Questions) × 100
Test Grade Example
Suppose a test has 50 questions and you answer 42 correctly.
Your percentage is:
(42 ÷ 50) × 100 = 84%
Using the grading scale on this calculator, an 84% score corresponds to a B.
How Many Questions Did You Miss?
The number of incorrect answers is calculated by subtracting your correct answers from the total number of questions.
For example, if you answer 42 out of 50 questions correctly:
50 − 42 = 8 incorrect answers
Test Grade Letter Scale
- A+ = 97%–100%
- A = 93%–96.99%
- A- = 90%–92.99%
- B+ = 87%–89.99%
- B = 83%–86.99%
- B- = 80%–82.99%
- C+ = 77%–79.99%
- C = 73%–76.99%
- C- = 70%–72.99%
- D+ = 67%–69.99%
- D = 63%–66.99%
- D- = 60%–62.99%
- F = below 60%
Your school or instructor may use a different grading scale. Check your syllabus for the official grading policy.
What Percentage Is a Perfect Test Score?
A perfect test score occurs when you answer every question correctly. For example, 50 correct answers out of 50 questions equals 100%.
Frequently Asked Questions
What grade is 42 out of 50?
42 out of 50 is 84%, which is a B using the grading scale used by this calculator.
What grade is 45 out of 50?
45 out of 50 is 90%, which is an A- using this calculator's grading scale.
How do I calculate my test percentage?
Divide the number of correct answers by the total number of questions and multiply by 100.
How many questions can I miss and still get an A?
The exact number depends on the total number of questions and the grading scale used by your school. Enter your test size and correct answers above to calculate your percentage.
Does every test use the same grading scale?
No. Instructors and schools may use different grading scales, and some tests may use curved grading or other adjustments.
For a more general points-based calculation, use our Grade Calculator.
To calculate a percentage from any point values, use our Percentage Grade Calculator.
If you want to determine what score you need on a final exam, use our Final Grade Calculator.