How to Calculate Test Score
This Test Grade Calculator — also known as a test score calculator or teacher grader — instantly finds your grade and percentage based on the number of correct (or wrong) answers out of the total questions. It also converts the percentage into the standard US letter grade (A+ through F) or the simplified A–F scale, and shows your equivalent GPA points.
Test Grade Calculator – How to Use It?
- Enter the total number of questions on the test.
- Enter the number of wrong answers (the calculator computes correct answers automatically).
- Choose a grading scale: the detailed US scale (A+/A/A−/B+…F) or the simplified scale (A/B/C/D/F).
- Click Calculate to see your percentage, letter grade, GPA points, and the full grade scale table.
You can share your result using the Share button — anyone with the link will see the same calculation loaded automatically.
How to Calculate Test Score – The Formula
To find the percentage score, divide the number of correct answers by the total number of questions, then multiply by 100:
Percentage score = (correct ÷ total) × 100 Since: correct + wrong = total Percentage score = 100 × (total − wrong) ÷ total
US Letter Grade Scale (with +/−)
| Letter Grade | Percentile | GPA Points |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A− | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B− | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C− | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D− | 60–62% | 0.7 |
| F | Below 60% | 0.0 |
Simple Scale (A/B/C/D/F – no +/−)
If your school uses the simplified system without plus/minus grades:
- A is 90% to 100%
- B is 80% to 89%
- C is 70% to 79%
- D is 60% to 69%
- F is 59% and below — not a passing grade
Test Grade Calculator – Advanced Usage
The grading scale shown above is the standard US system used by most American schools and universities. However, grading policies vary by institution, class, and teacher. Common variations include:
- A different passing threshold (e.g., 50%, 65%, or 70% instead of 60%)
- No +/− modifiers — use the Simple Scale option in the calculator
- A curved grading system where the highest score sets 100%
To handle a custom passing threshold, simply note that the calculator shows your percentage score alongside the letter grade — you can compare it against whichever standard applies to your class.
FAQs
What is a passing grade in the US?
In most US schools, a D− (60%) or above is considered a passing grade. Some colleges and advanced courses require a minimum of C (73%) or C− (70%) to receive credit. Always confirm with your instructor.
How do I calculate my test percentage?
Divide the number of correct answers by the total questions, then multiply by 100. For example, 18 correct out of 20 questions = (18 ÷ 20) × 100 = 90% → Grade A.
What does GPA mean?
GPA stands for Grade Point Average. Each letter grade maps to a GPA value on a 4.0 scale. An A+ or A equals 4.0, while an F equals 0.0. Colleges use GPA to track overall academic performance across all courses.
Can I use this calculator for multiple-choice tests?
Yes! Enter the total number of questions and the number you answered incorrectly. The calculator handles any test format — multiple choice, true/false, short answer — as long as each question is worth equal points.
Is there a grade calculator for the semester or final grade?
This tool focuses on individual test scores. For semester or final grade calculations that weight multiple assignments, check out our Education Calculators section for related tools.