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Test Grade Calculator

Enter how many questions were on the test and how many the student got wrong, and this test grade calculator returns the percentage score and a letter grade instantly — the digital version of the cardboard EZ Grader slide chart. It also prints the full chart for that test, so you can grade a whole stack of papers from one lookup. Runs in your browser: free, no sign-up.

Number of questions

Number wrong

Score

85% · B

Correct

17 of 20

Wrong

Each question is worth

Grading chart for 20 questions

WrongScoreGrade

0100%A

195%A

290%A-

385%B

480%B-

575%C

670%C-

765%D

860%D-

955.00%F

1050%F

1145%F

1240%F

1335%F

1430%F

1525%F

1620%F

1715%F

1810%F

195%F

200%F

Letter grades use a common US scale (93% = A, 90% = A-, 83% = B, and so on); cutoffs vary by school and instructor, so check your own scale. Everything runs in your browser — no scores are uploaded or saved.

Frequently asked questions

Divide the number of correct answers by the total number of questions and multiply by 100. This tool does it for you: enter the question count and the number wrong, and it shows the percentage, the letter grade, and how much each single question is worth.

It is the cardboard slide chart teachers have used for decades to turn wrong answers into a percentage without doing the arithmetic. This is the same idea online — and it prints the whole chart for your question count, so you can read off every possible score at once.

A common US scale where 93% is an A, 90% an A-, 83% a B, and so on down to 60% for a D-. Scales genuinely vary between schools, districts, and individual instructors, so treat the letter as a guide and check the scale you actually grade on.

Yes — free, no sign-up, and every calculation runs on your device, so no student scores are uploaded or stored.