Test Score Calculator. Enter the total number of questions and either your correct answers or wrong answers to get your test score percentage and letter grade. You can also customize the grading scale to match your school's system — perfect for students, teachers, and parents checking exam results. Also try the Extra Credit Calculator.
Test Score
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Letter Grade
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Correct Answers
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Wrong Answers
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Result
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Divide the number of correct answers by the total number of questions, then multiply by 100. For example, if you got 33 out of 40 correct, your score is (33 / 40) × 100 = 82.5%. You can also subtract your wrong answers from the total to find correct answers first. See also our calculate Modified Centor Score, Probability of Strep Pharyngitis & Clinical Recommendation — Centor Score.
27 out of 40 equals 67.5%, which is typically a D+ under a standard grading scale. Whether it counts as passing depends on your school's policy — most institutions require at least 60% to pass, so 67.5% would generally be considered a passing grade.
If you got 7 wrong out of 40, that means 33 correct answers. Your score is (33 / 40) × 100 = 82.5%, which corresponds to a B grade on a standard scale. It's a solid result just below the A threshold of 90%.
75 out of 80 equals 93.75%, which is an A grade on most standard grading scales. In stricter grading systems requiring 93% or above for an A, this would still qualify as an A. Well done! You might also find our Estimated CPA Score — CPA Exam Score useful.
A test score is your raw percentage of correct answers (e.g. 82.5%), while a grade is the letter classification (A, B, C, etc.) assigned based on a grading scale. Different schools use different grading scales, so the same percentage can yield different letter grades.
Yes — simply enter the total number of questions and the number of wrong answers. The calculator will automatically compute your correct answers using the formula: correct = total − wrong, then calculate your percentage score and letter grade.
By default, the calculator uses a standard US grading scale where A ≥ 90%, B ≥ 80%, C ≥ 70%, and D ≥ 60%. You can switch to a stricter or more lenient scale using the Grading Scale dropdown to match your school's policy.
Teachers use test score calculators to quickly convert raw scores into percentages and letter grades for entire classes. You can set a custom grading scale to reflect your course's difficulty, and the calculator handles all the math so grading is consistent and fast. Check out our Standard Score (Z-Score) Calculator as well.