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Built for teachers

Test grade calculator —score to grade.

Turn any test score into a percentage and letter grade in one tap. Set the number of questions, enter the misses, and read the grade instantly — any test size, free, no login.

Grade a test
Count by
Grading scale

Result · live

Grade B

22 correct3 wrong

Great work — a solid result.

Grading a stack?

88 percent, grade B. 22 of 25 correct.

Prefer the classic EZ grader?Same instant grading, framed as “number wrong”.Grading a whole class?Save every test score in the free gradebook — no login.

Grade any test in three taps

  1. Step 1

    Set the question count

    Type how many questions were on the test — any size, from a 5-question quiz to a 120-question final.

  2. Step 2

    Enter the misses

    Tap how many the student got wrong. The percentage recalculates with every change — no Calculate button.

  3. Step 3

    Read the score

    See the test percentage and a color-coded letter grade instantly, on the standard scale or your own cutoffs.

Test grading, answered

How do you calculate a test grade?

A test grade is the number of questions answered correctly divided by the total number of questions, written as a percentage. Gradejar does it for you: enter the test size and how many were missed, and it shows the percentage and the matching letter grade live — for example, 3 wrong on a 20-question test is 17 correct, which is 85%, a B on the standard scale.

What letter grade is a given score out of a number of questions?

Enter the total questions and the number missed and Gradejar maps the percentage straight to a letter using your chosen scale. On the default US 10-point scale, 90–100% is an A, 80–89% a B, 70–79% a C, 60–69% a D, and below 60% an F. Open the full grade chart to see the letter for every possible number wrong on your test size.

Does it work for any number of questions?

Yes. Set any total — a 10-point quiz, a 25-question test, a 100-question exam — and the percentage and letter grade adjust to that size. The classic “EZ grader” chart shows the percentage and grade for every number wrong, so you can grade by hand from the table too.

What counts as a passing test score?

On the standard US scale, 60% (a D) is usually the lowest passing grade, though many schools treat 70% (a C) as a true pass. Passing cutoffs vary by district and course, so Gradejar lets you pick “Custom” and set the exact percentage for each letter — the percentage and letter update instantly to match your policy.

Can I change the grading scale for a test?

Yes. Switch between the standard A–F scale and a plus/minus scale with one tap, or choose “Custom” and set your own percentage cutoff for every letter grade. The score, the letter, and the full chart all update live to use your scale.

Can it grade and remember a whole class of tests?

This calculator is built for grading one test at a time and saves nothing automatically. To keep scores for a whole class, open the Gradejar gradebook: it saves your classes, assignments, test scores, and grading scales privately in your own browser — no account, no login, no server. It is the one thing every other free test grade calculator can’t do.