Test Grade / Score Calculator (Teacher)

Enter the total number of questions and the number wrong to get your student's percentage score and letter grade — perfect for grading stacks of tests in seconds. You can also input the number correct directly. The Test Grade / Score Calculator applies a standard grading scale and shows a full grading chart so you can reference scores for any number of missed questions.

Enter the total number of questions on the test.

Enter how many questions the student got wrong.

Results

Percentage Score

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Letter Grade

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Correct Answers

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Wrong Answers

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Correct vs. Wrong Answers

Results Table

Frequently Asked Questions

How do I calculate a test score (percentage)?

Divide the number of correct answers by the total number of questions, then multiply by 100. For example, if a student gets 17 out of 20 correct, the score is (17 / 20) × 100 = 85%. This calculator does that math for you the moment you enter the totals.

How do I use this test grade calculator as a teacher?

Simply enter the total number of questions on the test and how many the student got wrong. The calculator immediately shows the percentage score, letter grade, and a full grading chart for every possible number of wrong answers — making it easy to grade a whole stack of tests.

What letter grade corresponds to each percentage?

The standard scale used here is: A+ (97–100%), A (93–96%), A- (90–92%), B+ (87–89%), B (83–86%), B- (80–82%), C+ (77–79%), C (73–76%), C- (70–72%), D+ (67–69%), D (63–66%), D- (60–62%), and F (below 60%). The grading chart below the result shows every score at a glance.

Is 27 out of 40 a passing grade?

27 out of 40 equals 67.5%, which falls in the D+ range under a standard grading scale. Whether that is considered passing depends on the institution — most schools require at least 60–70% to pass.

What grade is 7 wrong out of 40?

With 7 wrong answers out of 40 questions, the student got 33 correct, giving a score of (33 / 40) × 100 = 82.5%, which is a B- on a standard grading scale.

Is 75 out of 80 an A?

75 out of 80 equals 93.75%, which is an A on a standard grading scale. It falls within the A range (93–96%), so yes — that is an excellent score.

Can I use this calculator for quizzes and assignments, not just tests?

Absolutely. This tool works for any scored assessment — tests, quizzes, homework, or exams. As long as you know the total number of questions and how many were missed, it will calculate the grade.

What is the difference between number wrong and number correct inputs?

Both give you the same result — entering the number wrong tells the calculator how many the student missed, and it subtracts that from the total to find correct answers. You can verify the correct count in the results section. The formula is: correct = total − wrong, and score = (correct / total) × 100.

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