Test Score Percentage Calculator
Convert a raw test score to a percentage and letter grade instantly. Enter the number of correct answers and total questions.
How to use this tool
- Enter correct answers and total questions in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your score and the full breakdown beneath it.
Find your test percentage and letter grade in seconds. Perfect for students checking results on any scored assessment.
⚠ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation — verify with a qualified professional.
Formula
Score (%) = (Correct Answers ÷ Total Questions) × 100
Letter grade thresholds: A ≥ 90%, B ≥ 80%, C ≥ 70%, D ≥ 60%, F < 60%
How it works
This calculator divides the number of correct answers by the total number of questions, then multiplies by 100 to produce a percentage score. The percentage is mapped to a letter grade using the standard US academic scale (A/B/C/D/F). Results assume all questions carry equal weight; it does not account for partial credit or bonus questions.
Worked example
- Correct answers = 42, Total questions = 50.
- Score (%) = (42 ÷ 50) × 100 = 84%.
- 84% falls in the range 80–89%, which maps to a letter grade of B.
Score: 84% — Letter Grade: B
Common mistakes to avoid
- Dividing correct answers by the total number of points when the test assigns partial credit, rather than by the number of questions.
- Rounding the percentage to a whole number before comparing to letter-grade cutoffs, turning an 89.6% into an A when the threshold is exactly 90%.
- Assuming letter-grade cutoffs are universal — many instructors use 93/83/73/63 as the A/B/C/D boundaries rather than the 90/80/70/60 defaults.
Key terms
- Raw score
- The count of correct answers before any conversion to a percentage or letter grade.
- Percentage score
- Raw score expressed as a fraction of the total possible points, multiplied by 100.
- Letter grade
- An alphabetic symbol (A–F) representing a range of percentage scores according to a grading scale.
- Grading scale
- The set of percentage cutoffs that determine which letter grade is awarded; common US thresholds are 90/80/70/60.
Frequently asked questions
- How do I convert a score to a percentage?
- Divide the number of correct answers by the total questions, then multiply by 100.
- What are the standard letter grade cutoffs?
- A: 90–100%, B: 80–89%, C: 70–79%, D: 60–69%, F: below 60%. Your school may use slightly different cutoffs.