Test grade calculator.
Grade a test in seconds. Enter the total number of questions and how many were answered wrong and the calculator returns the percentage score and the letter grade.
Test result
LiveThe score is the number correct divided by the total, times 100. This is the classic teacher grading method for a quiz or test.
Score
88%
percent correct
Uses a common US letter scale (90 A, 80 B, 70 C, 60 D). Your school may differ. Calculations run in your browser; nothing you enter is stored.
How it works
Right over total
Grading a test is a simple percentage: take the number answered correctly, divide by the total number of questions, and multiply by 100. Twenty-two correct out of twenty-five is 88%, which is a B on the usual scale.
This is what teachers call an EZ-grader: enter the total and the number wrong, and you instantly get the percent and the letter, without counting up the correct answers by hand.
Reference
Wrong answers to score.
The percentage score for a number of wrong answers on a 20-question test.
| Wrong (of 20) | Score |
|---|---|
| 0 | 100% |
| 1 | 95% |
| 2 | 90% |
| 4 | 80% |
| 6 | 70% |
| 10 | 50% |
The full guide
The complete guide to grading a test.
How the percentage works, how letters are assigned, and how partial credit fits in.
Turning answers into a percentage
A test score is the fraction of questions answered correctly, expressed as a percentage. Divide correct by total and multiply by 100. Entering the number wrong is just a quick way to get there, since correct equals total minus wrong.
Every question counts equally in this method, which is the standard for most quizzes and tests.
Assigning the letter grade
Most US schools map the percentage to a letter in ten-point bands: 90 and up is an A, 80 to 89 a B, and so on down to an F below 60. Some use plus and minus grades inside those bands.
The calculator applies the standard bands to the score it computes.
Partial credit and weighting
If some questions are worth more, or partial credit applies, a simple right-over-total count is not enough. In that case total the points earned and divide by the points possible, or use the grade calculator for weighted parts.
For a standard one-point-per-question test, this calculator is all you need.
Using it as a teacher or student
Teachers use it to grade a stack of papers fast: enter the total once and change the number wrong for each student. Students use it to check a score or to see what a few more correct answers would do to the grade.
Because it is instant, it is handy for setting a target before a test too.
The formula
Right over
total.
A test score is the number correct divided by the total questions, times 100, then mapped to a letter grade.
Grade calculator ›# Test grade
correct = total - wrong
score = correct / total × 100
# 3 wrong of 25
22 / 25 = 88% (B)Questions
Test grade questions.
How do I calculate a test score?
+
Divide the number of correct answers by the total questions and multiply by 100. Enter the total and the number wrong above and the calculator gives the percent and letter.
What grade is 22 out of 25?
+
That is 88%, which is a B on the standard ten-point scale. Twenty-two correct out of twenty-five is three wrong.
How do I grade with partial credit?
+
Total the points earned and divide by the points possible. For weighted parts, use the grade calculator instead of a simple right-over-total count.
What letter grade is my score?
+
On the common scale, 90 and up is an A, 80 to 89 a B, 70 to 79 a C, 60 to 69 a D, and below 60 an F.
Is this test grade calculator free?
+
Yes. It is completely free with no sign-up, and every calculation runs locally in your browser, so nothing you enter is stored or sent anywhere.
About the developer
Jean Borg
Jean builds and maintains every calculator on freecalculators.pro from Malta, with a focus on tools that are fast, free and show their working. The test grade calculator is a quick EZ-grader for a quiz or test.