Test Grade Calculator
Type in how many questions were on the test and how many were missed. You get the percentage, the letter grade, and a full grading chart for every possible score, the same quick read a teacher’s EZ Grader gives, right in your browser.
Free · No sign-up · Works on your phone · Nothing you enter is saved or sent
See the full grading chart
Edit grade scale
Set the minimum percent for each letter grade — handy if your school uses a custom scale (say, 93 for an A, or 50 to pass). Applies to both tabs.
How to use this test grade calculator
- Enter the number of questions (or points) on the test.
- Enter how many the student got wrong. If it is easier to count the ones marked right, hit “Switch to number correct” instead.
- Read the result: the percentage, the letter grade, and the score as a fraction. Turn on +/- grades if your scale uses them.
- Open See the full grading chart to view the score for every number of wrong answers, or switch to Whole class to grade a stack of papers at once. Need a non-standard scale? Open Edit grade scale to set your own cutoffs.
There is no submit button. The grade updates as you type, so you can try a few what-if numbers without starting over.
What is a test grade calculator?
A test grade calculator turns a raw score into a grade. You tell it the total number of questions and how many were missed, and it works out the percentage and the matching letter. People call the same tool a few different things: an exam grade calculator, an easy grade calculator, a quiz grade calculator, or simply an EZ grader or easy grader, the plastic sliding chart teachers have used for decades to grade a stack of tests fast.
It works for any classroom assessment scored out of a fixed number of questions or points: a pop quiz, a unit test, a midterm, a final exam, a worksheet, or a lab. It works just as well for a middle-school quiz, a high-school final, or a college exam. Students use it the minute they get a test back to see where they landed. Teachers use it to convert a whole class’s raw scores into letter grades without doing the same division by hand thirty times.
How a test grade is calculated
The math is a single division. Take the number of questions answered correctly, divide by the total number of questions, and multiply by 100:
If you counted wrong answers instead of right ones, the calculator subtracts them first, which comes out to the same number:
The same formula works in points instead of questions: divide the points earned by the total points possible. Some schools call those points marks, but the calculation does not change. Either way the result is a percentage, meaning how much of the test you got right. That is not the same as a percentile, which ranks your score against other students on a standardized test.
That percentage is then matched to a letter on a grading scale. On the common United States scale, 90 and up is an A, 80s are a B, 70s a C, 60s a D, and below 60 is failing. The calculator can also use a plus/minus scale (so 90–92 is an A− and 93–96 is an A) and report a 4.0-style grade point if you want one.
Worked example
Say a quiz had 20 questions and a student missed 2. That leaves 18 correct:
Here is a longer one. A 60-question test with 6 wrong gives 54 correct:
Both land on 90%, a reminder that the same letter can hide very different tests. Missing 2 of 20 and missing 6 of 60 feel different in the moment, but they are the same grade. That is why the grading chart below matters: it lays out exactly what each missed question costs on your particular test.
The grading scale and what each score is worth
Here is the standard letter-grade scale the calculator uses, with the grade point value most United States schools attach to each letter:
| Letter | Percentage | GPA |
|---|---|---|
| A | 90–100% | 4.0 |
| B | 80–89% | 3.0 |
| C | 70–79% | 2.0 |
| D | 60–69% | 1.0 |
| F | Below 60% | 0.0 |
One thing worth knowing: the percentage for a given number wrong depends entirely on how many questions the test had. Miss one question on a 10-question quiz and you drop to 90%. Miss one on a 50-question test and you are still at 98%. On a short test, every question carries more weight. The full grading chart inside the calculator spells this out for your exact test length, which is handy when you are staring at a 12-, 15-, or 25-question quiz and want to know what one more mistake would do.
Schools do not all use the same cutoffs. If yours starts an A at 93, or counts 50% as passing, open Edit grade scale under the calculator and set your own minimum for each letter. The grade, the full chart, and the whole-class results all update to match.
Quick answers to common scores
A few specific scores that come up a lot:
- 27 out of 40 is 67.5%, a D+. That passes at most schools, but barely.
- 7 wrong out of 40 means 33 correct, which is 82.5%, a B (B− on a plus/minus scale).
- 75 out of 80 is 93.75%, a solid A.
- 18 out of 20 is 90%, an A or A−, depending on the scale.
- 9 out of 12 is 75%, a C.
For any other combination, type your own numbers into the calculator, and the answer updates instantly.
For teachers: grade a whole class at once
Switch the calculator to Whole class, and you have a quick gradebook. Whether you are marking multiple-choice answer sheets against an answer key by hand or reading the number wrong off a Scantron, you set the number of questions once, then add each student with the number they missed. Every student gets a percentage and a letter, and you get the class average, the highest and lowest scores, and how many students passed. That is useful for spotting a question everyone got wrong, or for seeing whether a test was fair before you enter the grades.
This is the part that earns the old “easy grader” and “teacher grade calculator” nicknames. Instead of running the same division for every paper, you read the missed count off each test, and the totals fill in for you.
How one test affects your overall grade
A test grade on its own is not the same as your grade in the class. This calculator tells you what you scored on the test itself. What that does to your overall grade (the number on your report card at the end of the marking period or semester) depends on how much the test is weighted against your homework, quizzes, and other work in your course’s grading system.
A 90% on a test counts for a lot if the test is 40% of your grade, and very little if it is one of twenty small quizzes. To see the full picture (where every assignment and its weight come together), use the main grade calculator for your whole course, which combines every assignment by how much it counts. A dedicated final-grade tool for working out exactly what you need on the last exam is on the way.
Common mistakes to avoid
- Mixing up wrong and correct. Entering the number right when the field asks for wrong (or the reverse) flips the score. Use the switch button so the label always matches what you are counting.
- Forgetting half credit. If partial-credit questions put your score at something like 17.5 out of 20, enter it as 17.5, and the grade includes the half.
- Counting extra credit against the total. Bonus points can push a score above 100%. Add them to the correct count, not to the number of questions.
- Assuming every school uses the same cutoffs. Some schools start an A at 93, others at 90; some round 89.5 up to an A−, others do not. Check your syllabus if you are right on a boundary.
Frequently asked questions
How do I calculate my test grade?
Divide the number of questions you got right by the total number of questions, then multiply by 100. For example, 33 right out of 40 is 33 ÷ 40 × 100 = 82.5%. The calculator above does this for you and adds the letter grade.
Is 27 out of 40 a passing grade?
27 out of 40 is 67.5%, which is a D+ on the standard scale. That counts as passing at most schools, since passing usually starts at 60%, but it is on the low end. Check your school’s cutoff if a D is close to failing for your course.
What grade is 7 wrong out of 40?
7 wrong out of 40 leaves 33 correct, which is 82.5%. That is a B, or a B− if your school uses plus and minus grades.
Can I use this for quizzes, exams, and finals?
Yes. Anything scored out of a set number of questions or points works the same way: a pop quiz, a unit test, a midterm, or a final. Just enter the total and how many were missed.
How does the letter grade get decided?
The calculator matches your percentage to the standard United States scale: 90 and up is an A, 80s a B, 70s a C, 60s a D, and below 60 is an F. Turn on the plus/minus option for finer letters like B+ or A−, or open Edit grade scale to set your own cutoffs if your school uses a different scale.
What if questions are worth half a point?
You can enter a half-point score directly, like 17.5 out of 20, and the grade comes out right. To show the grading chart in half-point steps too, set Chart rows to “Half points.”
Can I grade a whole class at once?
Yes. Switch to the Whole class tab, set the number of questions, and add each student with how many they missed. You get every student’s grade plus the class average, high, low, and number passing.
Does this calculate my weighted or final course grade?
No, it grades a single test. To combine a test with your other work and its weighting, use the main grade calculator.
Is it free, and is anything saved?
It is completely free with no sign-up. Everything runs in your browser, and nothing you type is stored or sent anywhere. Close the tab and it is gone.
Related calculators
Grades from this tool are estimates based on the scale you choose. Your school’s official grading policy, rounding rules, and any curve always take precedence.