Use this free grade calculator to turn a test into a grade: type in how many questions it had and how many were missed. You get the percentage, the letter grade, and a chart of every possible score, all worked out in your browser.
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Enter the total number of questions and how many were wrong to see your grade.
Enter the total number of questions to see every possible score. Your score will be outlined and marked in the chart.
| Wrong | Correct | Percent | Grade | Your score |
|---|
To grade a test, subtract the wrong answers from the total questions, multiply by 100, and divide by the total. Then compare the percentage with your grading scale. On a 25-question test with 3 wrong, that is 22 × 100 ÷ 25 = 88%, a B on the standard scale. A score exactly on a cutoff earns that grade, so 2 wrong on 20 questions is exactly 90% and an A. The grade calculator above does this as you type, and the tools below cover weighted grades, final exams, GPA and more.
Check a score before the paper comes back, see how much a single question is worth, or work out what a final exam has to be to reach a target. Parents and tutors can use the same tools to check homework and practice tests.
Start with the final grade calculator to find the exam score you need, or the weighted grade calculator for categories that count differently.
Grade a stack of tests from a chart instead of redoing the arithmetic each time, curve a test that came out harder than planned, or keep a class score sheet that stays in your browser.
Try the printable grading charts, the grade curve calculator, or the class grade score sheet.
Correct = Total − Wrong
Percentage = (Correct × 100) ÷ Total
The grade is the first line on the scale, counting down from the top, whose minimum is at or below the percentage. This is the boundary and rounding rule used across the site.
| Test | Wrong | Correct | Percent | Standard | Plus/minus |
|---|---|---|---|---|---|
| 25 questions | 3 | 22 | 88% | B | B+ |
| 20 questions | 2 | 18 | 90% | A | A- |
| 40 questions | 2.5 | 37.5 | 93.75% | A | A |
The second row sits exactly on the standard scale’s A cutoff of 90, so it earns the A. On the plus/minus example, 90 is the start of the A- band.
There is no single correct scale. One teacher may start an A at 90, another at 93, and a course may use letters, points, or neither. That is why the two built-in scales are labelled as examples.
To use your own, pick Custom in the calculator, open Settings and custom scale, and list your grades from highest to lowest with the minimum percentage for each. Cutoffs must go down row by row and the last one must be 0. Your scale is saved in this browser only. If your teacher rounds a score first, such as 89.5 becoming 90, turn on Round before grading. You can build and print a chart for your scale with the grading scale calculator.
Grading scales and rounding rules differ between schools and countries, so check your syllabus first. For background, see Grading in education and Percentage on Wikipedia.
Yes. It is free, needs no sign-up, and runs in your browser. What you type is not sent anywhere.
On the standard example scale, yes. A score at or above a cutoff earns that grade, so 18 right out of 20 is an A. Your school may use a different rule, so choose a custom scale if you need one.
It depends on the test length and the scale. On 25 questions with the standard scale, a B needs at least 80%, which is 20 correct, so up to 5 wrong. The chart above shows every case for your test.
No, unless you turn on “Round before grading”. By default it rounds only what it shows, so 89.5% displayed as 90% is still graded as 89.5%. If that happens, the result tells you.
Some teachers take off half a point for a partly correct answer. Turn on half-point scoring in the settings to enter values like 2.5 wrong answers.
Not necessarily. It is one common arrangement, offered as an example. Compare it with your syllabus and use Custom if your cutoffs differ.
The calculator does its work in your browser and does not transmit what you type. Your scale settings are stored in your browser on this device. Like most websites, this site may record ordinary visit information, which is described in the privacy policy.
Treat them as a quick, transparent estimate. Your instructor or school decides official grades. See the disclaimer.