Match your own grading scale
If your school uses a 90/80/70/60 scale with no plus or minus, switch the bands to ten-point and the chart relabels.
Easy grader
For grading tests and quizzes fast. The chart lists every possible score.
Frequently asked questions
How do I calculate a test score percentage?
Divide the number correct by the number of questions and multiply by 100. 17 correct out of 20 is 17 ÷ 20 × 100 = 85%.
What is 17 out of 20 as a grade?
17 out of 20 is 85%, a B on both plus/minus and ten-point bands.
How much is each question worth?
On a test where every question counts the same, each is worth 100 ÷ the number of questions: 5% on a 20-question test, 4% on a 25-question test.
Can I print the grading chart?
Yes. Open the chart and print the page; the chart lists every number wrong from zero up with its percentage and letter grade.
How the easy grader works
Each question is worth the same share of 100%. Take away the wrong answers, divide by the number of questions, and multiply by 100. The chart repeats that for every possible number wrong, so you can grade a stack of tests by reading across one row at a time.
On a 20-question test each question is worth 5%, so 3 wrong is 85% (a B) and 5 wrong is 75% (a C).
| Questions | Each question | 1 wrong | 2 wrong | 5 wrong |
|---|---|---|---|---|
| 10 | 10% | 90% | 80% | 50% |
| 20 | 5% | 95% | 90% | 75% |
| 25 | 4% | 96% | 92% | 80% |
| 40 | 2.5% | 97.5% | 95% | 87.5% |
| 50 | 2% | 98% | 96% | 90% |
Partial credit
Enter half-wrong answers as .5: 2.5 wrong on a 20-question test is 87.5%.
What this calculator assumes
- Every question is worth the same. For tests with different point values, use the grade calculator’s total-points mode.
- Letters use plus/minus bands from The Princeton Review’s table, or ten-point bands if you choose them. No rounding is applied.