This test grader estimates your score based on total points (or questions) and the number of wrong answers. It also assigns a letter grade using the scale you set below.
How to Calculate Your Test Score Percentage
To calculate your test grade percentage: divide your correct answers by the total points, then multiply by 100. For example, 16 correct out of 20 = (16 ÷ 20) × 100 = 80%. This calculator does it instantly — just enter the total and the number of wrong answers.
Formulas used
- Correct answers: correct = total − wrong
- Percentage: percent = (correct ÷ total) × 100
- Letter grade: the grade is the highest letter whose minimum percentage is less than or equal to your result (based on your customized scale).
FAQ - Test grade
Can I use this for points instead of questions?
Yes. “Total points” can represent questions, points, or any total scoring units-as long as
“wrong” uses the
same units.
What if I have partial credit?
If your exam gives half‑points (or any increment), set the increment field accordingly and
edit the scale if
needed. For strict partial-credit grading, consider using points instead of questions.
How do I customize the grading scale?
Update the minimum percentages for each letter grade. The calculator will automatically
apply
your
thresholds.
Why doesn’t my grade match my teacher’s?
Some grading systems use curves, weighted sections, or specific rounding rules. This
calculator uses the
straightforward percentage method and your scale thresholds.
Is my information saved?
No. Calculations are performed locally in your browser.
How do I calculate my test score percentage?
Divide your correct answers by the total points and multiply by 100. For example: 18 correct out of 25 = (18 ÷ 25) × 100 = 72%. This calculator does this automatically as soon as you enter your data.
What is a passing grade on a test?
A passing grade is typically 50–60% depending on the institution. In many schools, 60% is a D and the minimum pass, while 70% is a C. Use this test grader and customize the grading scale to match your institution's thresholds.
What is a test grader?
A test grader (or test grade calculator) is a tool that converts your raw score into a percentage and letter grade. Enter the total number of questions and the number of wrong answers — the grader does the rest automatically.