Test Grade Calculator — Score and Letter Grade from Wrong Answers
CalculatorA test grade calculator computes (questions - wrong) ÷ questions × 100 and maps the score to a letter grade from A+ to F.
What is it
When every question is worth the same, the score is the fraction of correct answers. Subtract wrong answers from the total to get correct answers, divide by the total, and multiply by 100. The letter grade follows the common 10-point scale (90+ A range, 80+ B range, and so on), and actual grading scales vary by school and test.
score (%) = (questions - wrong answers) ÷ questions × 100
How to use
- 1Enter the total number of questions.
- 2Enter the number of wrong answers.
- 3Check the score percentage, letter grade, and points per question.
Reference
| Questions | Wrong | Score (%) | Grade |
|---|---|---|---|
| 20 | 2 | 90 | A- |
| 25 | 5 | 80 | B- |
| 50 | 13 | 74 | C |
Sources & standards
- Percent - Wolfram MathWorld
FAQ
What is my score if I miss 2 out of 20 questions?
(20 - 2) ÷ 20 × 100 = 90%, which is an A- on the common scale.
Is the letter grade scale universal?
No. This tool uses the common US 10-point letter scale (90+ is an A range, 80+ a B range), but schools and tests define their own scales.
Is test grade calculator input sent to a server?
No. This tool runs in your browser and does not send input to a server.