Test Grade Calculator
Enter either correct or wrong answers plus total questions to turn a test or quiz score into a percentage, missed-question count and letter-grade reference.
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How to calculate a test grade
Divide the number of correct answers by the total number of questions, then multiply by 100. If you only know how many answers were wrong, select Wrong answers; Lynara subtracts that count from the total before applying the same formula.
test grade % = correct answers ÷ total questions × 100
Test and quiz examples
- 23 correct out of 25: 92%, with 2 questions missed.
- 2 wrong out of 25: the same 92% result.
- 17 correct out of 20: 85%, with 3 questions missed.
- Extra credit or curves: use the grading rule supplied by your instructor rather than silently adding points here.
Need a printable score table for many possible results? Open the Teacher Grader.
Privacy: calculator inputs are processed in your browser; Lynara does not need to upload these values to calculate the result.
Formula
test grade = correct answers ÷ total questions × 100
When 18 correct answers do not mean 90% of the available points
- On an equally weighted 20-question quiz, 18 correct answers and 2 wrong answers give 18 ÷ 20 × 100 = 90%. The wrong-answer entry mode should give the same percentage.
- Now imagine a different test with 18 one-point questions and 2 six-point questions. If the learner answers all 18 one-point questions correctly but misses both six-point questions, the correct-answer count is still 18 out of 20.
- In this points-weighted test, the available score is 18 × 1 + 2 × 6 = 30 points and the earned score is 18 points. The actual points percentage is 18 ÷ 30 × 100 = 60%, not 90%.
What the result tells you
Question-count percentages are reliable only when every question has equal weight. The same count of correct answers can represent a very different score when points vary by question.
Before you use the result
Lynara’s Test Grade Calculator works from question counts. For mixed point values, add earned and possible points from the real marking scheme and use the Grade Percentage Calculator instead.
Useful for
- Quiz grades
- Exam grades
- Practice-test scoring
Questions
Can I enter wrong answers instead of correct answers?
Yes. Switch the score-entry mode to Wrong answers; Lynara converts the count back to correct answers before calculating the percentage.
Can correct or wrong answers exceed the total?
No. The calculator rejects impossible counts.
How is the letter grade chosen?
A common US reference scale is shown, but your course may differ.