Test Grade Calculator

Divide the number of correct answers by the total number of questions, then multiply by 100 to get your percentage score. For example, if you got 33 out of 40 correct: (33 / 40) × 100 = 82.5%, which is a B letter grade.

Subtract the number of wrong answers from the total questions to get the number correct, then divide by the total and multiply by 100. Formula: ((total − wrong) / total) × 100. For example, 7 wrong out of 40 gives (33 / 40) × 100 = 82.5%.

7 wrong out of 40 means you got 33 correct, which is a score of 82.5%. That falls in the B range on a standard grading scale.

27 out of 40 equals 67.5%, which is typically a D+ on a standard grading scale. Most schools require at least 60–70% to pass, so this is generally considered a passing grade, though it depends on the institution's policy.

75 out of 80 equals 93.75%, which is an A on most standard grading scales. In fact, it falls within the A or A- range depending on whether your school uses plus/minus grades.

A standard grading scale is: A (90–100%), B (80–89%), C (70–79%), D (60–69%), and F (below 60%). Some schools also use plus/minus grades like A+, A-, B+, etc. for finer distinctions within each range.

Yes — this calculator works for any scored assessment including quizzes, exams, tests, and homework assignments. Simply enter the total number of questions and how many you got right or wrong, and it will compute your percentage and letter grade.

On a standard grading scale, you need at least 90% to earn an A. An A+ typically requires 97% or above, while an A- usually covers 90–92%. The exact cutoffs may vary by school or instructor.