To convert a test score to a percentage, divide the points earned by the points possible and multiply by 100. The Test Score Calculator does this and shows the standard letter grade.
How to use the Test Score / Percentage Grade Calculator
- Enter the points you earned.
- Enter the points possible.
- Read the percentage and letter grade.
- Repeat for other tests.
Worked example
Scoring 42 out of 50 is 84%, which is a B on the common 90/80/70/60 scale.
Tips and common mistakes
- Grading scales differ between schools, so the letter may not match yours.
- Check whether extra credit is counted in points possible.
- Use the Grade Calculator to plan final exams.
Frequently asked questions
How do I calculate a percentage score?
Points earned divided by points possible, times 100.
Are letter grades the same everywhere?
No. Cutoffs vary by school and instructor.
Is it private?
Yes.