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.
Follow along with the free Test Score / Percentage Grade Calculator, which runs in your browser, or browse more tools in this category.
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.