Grade Calculator: Points to Percent and Letter
Your test or assignment score as a percentage and a letter grade.
Good to know. Two marks wrong on a 20-question quiz costs as much as five on a 50-question test.
How it works
In plain words
Divide the points you earned by the points possible and multiply by 100. With a number of questions, the points earned are the questions minus the wrong answers. The letter follows from the percentage on the scale below.
The formula
score % = points earned ÷ points possible × 100 A ≥ 93 · A− ≥ 90 · B+ ≥ 87 · B ≥ 83 · B− ≥ 80 · C+ ≥ 77 · C ≥ 73 · C− ≥ 70 · D ≥ 60
Worked example
43 out of 50 is 43 ÷ 50 × 100 = 86%, a B on the usual US scale. 0.5 more points would make it a B+.
Sources
No outside data or rates: this is plain arithmetic.
6 automated tests check its answers on every change.
About the grade calculator: points to percent and letter
A grade is the share of the available points you earned. This calculator turns a score into a percentage and a letter grade, either from points (43 out of 50) or from the number of questions and how many you got wrong, which is how most teachers mark a quiz.
The letter grades follow a scale common in US schools and colleges: 90 and above is an A, 80s a B, 70s a C and 60s a D, with plus and minus grades at the top and bottom of each range. Schools set their own cut-offs, and some use 94 for an A or no plus and minus grades at all, so check your syllabus. The table shows, for this test, the score needed for each letter, or how many questions you can miss.
For teachers, the “number wrong” mode works as a quick grader: set the number of questions once and change the wrong answers for each paper. Weighted tests, where some sections count more, are better done with the weighted average calculator.
For the grade you need on a final exam to reach a target for the course, use the final grade calculator; for a US grade point average across courses, the GPA calculator.
Questions people ask
How do I calculate my test grade?
Divide the points you got by the total points and multiply by 100. 43 out of 50 is 86%.
What letter grade is 86%?
A B on the usual US scale (83–86). Some schools make 86 a B+ or use different cut-offs.
How many questions can I miss and still get an A?
On 25 questions, 1 wrong is 96%, an A; 2 wrong is 92%, an A−. On the table, “wrong answers allowed” shows it for every letter.