Test Grade Calculator
Turn the number of questions and wrong answers into a percentage score and letter grade instantly.
📝 What is the Test Grade Calculator?
The test grade calculator turns a raw test result into a percentage and a letter grade. You enter how many questions the test had and how many were answered incorrectly, and it instantly returns the score as a percentage, the matching letter grade, and the number of questions correct. It is the fast, teacher-style grader that counts wrong answers rather than right ones.
Students and teachers use it constantly. A student wants to know what 46 out of 50 works out to, and whether that clears the line for an A. A teacher grading a stack of papers counts the red marks and needs the percentage for each. A parent checking homework wants a quick letter grade. In every case the same two numbers, the total and the number wrong, give the answer without any manual division.
The calculation itself is simple: subtract the wrong answers from the total to get the number correct, divide by the total, and multiply by 100. The part that trips people up is the letter grade, because cutoffs vary between schools. This tool uses the widely used scale where 90 and above is an A range, the 80s a B, the 70s a C, the 60s a D, and below 60 an F, with plus and minus bands near the boundaries. If your school uses different cutoffs, treat the percentage as the reliable figure.
The tool is useful because it removes the mental arithmetic and the lookup, and it works for points as well as questions. Enter points possible as the total and points lost as wrong, and the same percentage and letter grade come straight out, with the working shown.
📐 Formula
📖 How to Use This Calculator
Steps
💡 Example Calculations
Example 1 - 50-question test, 4 wrong
Example 2 - 25-question quiz, 3 wrong
Example 3 - 20-question test, all correct
❓ Frequently Asked Questions
🔗 Related Calculators
How do you calculate a test grade?
Divide the number of correct answers by the total number of questions and multiply by 100. If you got 46 out of 50 correct, that is 46 / 50 x 100 = 92 percent. Subtract the wrong answers from the total to find the number correct.
How do I turn a percentage into a letter grade?
Map the percentage to a scale. On a common scale, 90 and above is an A range, 80 to 89 a B, 70 to 79 a C, 60 to 69 a D, and below 60 an F, with plus and minus bands near the edges. So 92 percent is an A-minus. Cutoffs can vary by school.
What grade is 46 out of 50?
46 out of 50 is 92 percent, which is an A-minus on the common scale. You can check any score the same way: divide the number correct by the total, multiply by 100, then read off the letter. The calculator does both steps for you.
How many can I get wrong and still get an A?
It depends on the number of questions. An A usually starts at 90 percent, so on a 50-question test you can miss up to 5 (45 out of 50 is 90 percent). On a 20-question test you can miss only 2 to stay at 90 percent. Enter your test length to see the exact cutoff.
How does a teacher grade a test quickly?
Teachers often count the wrong answers rather than the right ones, then subtract from the total. This calculator works the same way: enter the total questions and how many were wrong, and it returns the number correct, the percentage, and the letter grade.
What is the grade for 100 percent?
A perfect score of 100 percent is an A-plus on the common scale, the highest letter grade. It means every question was answered correctly. On this calculator, entering zero wrong answers for any test length gives 100 percent and an A-plus.
Can I use this for a points-based test?
Yes. Enter the total points possible as the total and the points you lost as the number wrong. The calculator treats points the same as questions, so 88 out of 100 points comes out as 88 percent. This works for any test scored out of a fixed total.
Do all schools use the same letter-grade scale?
No. The 90-80-70-60 cutoffs are common in the United States, but many schools shift the boundaries, drop plus and minus grades, or use a different letter for the same percentage. Always check your school's grading policy if a borderline result matters.
What is a passing grade on a test?
A passing grade is usually 60 or 70 percent depending on the school or course, which maps to a D or a C. Some programs require a higher minimum. Enter your score to see the percentage, then compare it against your course's stated passing mark.