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Test grade calculator

Your grade

76% C

19 of 25 correct

You missed 6. Make a practice test from your notes so the same questions do not catch you on the final.

Three study sets are free.

How to calculate a test grade

Your test grade is the share of the questions you got right. Take the questions you got right, divide by the total, and multiply by 100. If your test counts points instead of questions, the same formula works with points.

Test grade = (questions − wrong answers) ÷ questions × 100

Say the test had 25 questions and you got 6 wrong. You got 19 right, and 19 ÷ 25 × 100 = 76%, which is a C.

Grading chart for a 20-question test

Every score on a 20-question test, from no mistakes to ten. Use the calculator above for any other length.

WrongGradeLetter
0100%A
195%A
290%A
385%B
480%B
575%C
670%C
765%D
860%D
955%F
1050%F

After the test

The questions you missed are the best study guide you will get, because they show exactly what you do not know yet. They tend to come back on the final.

Add your notes, slides or a PDF to Lexie and you get a practice test from your own class material, and the questions you miss come back until you know them. To see what the test did to your class grade, use the weighted grade calculator, and to see what you need on the final, the final grade calculator.

Frequently asked questions

Subtract the questions you got wrong from the total, divide by the total, and multiply by 100. With 6 wrong out of 25, that is (25 − 6) ÷ 25 × 100, which gives 76%, a C.
It works the same way. Put the total points in as the number of questions and the points you lost as the number wrong. Half points are fine, for example 2.5.
On the most common US scale, 90% and up is an A, 80 to 89% is a B, 70 to 79% is a C, 60 to 69% is a D, and below 60% is an F. Some schools use a different scale or add plus and minus grades, so check your syllabus.
For an A you need 90%, so you can miss one question in ten. That is 2 on a 20-question test, 2 on a 25-question test, and 5 on a 50-question test.
It depends on how much tests count in your class. Enter your categories and their weights in the weighted grade calculator to see your class grade.
Yes. Enter the number of questions and the number a student got wrong, and the calculator gives the percentage and the letter grade. The chart on this page lists every score on a 20-question test.