Test Grade Calculator
Calculate test grades, percentages, and letter grades with customizable grading scales
Calculate Test Grade
Total possible points or questions on the test
Questions answered incorrectly
Test Grade Results
Grade Details
GPA Equivalent: 4.0
Score: 20 out of 20
Formula: (20 ÷ 20) × 100 = 100.0%
Performance Analysis
🎉 Excellent performance! This is an A-level score.
Example Calculation
Student Example
Test: 18 questions total
Student got wrong: 3 questions
Correct answers: 18 - 3 = 15 questions
Calculation Steps
Percentage = (Correct ÷ Total) × 100
Percentage = (15 ÷ 18) × 100
Percentage = 0.8333 × 100 = 83.33%
Letter Grade: B (83-86% range)
Grading Scale Table
| Correct | Wrong | % | Grade |
|---|---|---|---|
| 20 | 0 | 100.0% | A+ |
| 19 | 1 | 95.0% | A |
| 18 | 2 | 90.0% | A- |
| 17 | 3 | 85.0% | B |
| 16 | 4 | 80.0% | B- |
| 15 | 5 | 75.0% | C |
| 14 | 6 | 70.0% | C- |
| 13 | 7 | 65.0% | D |
| 12 | 8 | 60.0% | D- |
| 11 | 9 | 55.0% | F |
| 10 | 10 | 50.0% | F |
| 9 | 11 | 45.0% | F |
| 8 | 12 | 40.0% | F |
| 7 | 13 | 35.0% | F |
| 6 | 14 | 30.0% | F |
| 5 | 15 | 25.0% | F |
| 4 | 16 | 20.0% | F |
| 3 | 17 | 15.0% | F |
| 2 | 18 | 10.0% | F |
| 1 | 19 | 5.0% | F |
Showing first 20 entries. Adjust increment for more granular table.
Standard Grading Scale
Test Taking Tips
Read all questions carefully before answering
Manage your time - don't spend too long on one question
Answer easy questions first, then return to harder ones
Review your answers if time permits
Use process of elimination for multiple choice
Show your work on calculation problems
How to Calculate Test Grades
Basic Formula
Percentage = (Correct Answers ÷ Total Questions) × 100
The percentage score is simply the ratio of correct answers to total possible answers, multiplied by 100 to get a percentage.
Alternative Formula
Percentage = 100 × (Total - Wrong) ÷ Total
You can also calculate by subtracting wrong answers from the total, then dividing by total questions.
Step-by-Step Process
- 1.Count the total number of questions or points possible
- 2.Count the number of correct answers or points earned
- 3.Divide correct by total to get decimal score
- 4.Multiply by 100 to convert to percentage
- 5.Compare to grading scale to get letter grade
Example
A student scores 27 out of 40 questions correctly:
27 ÷ 40 = 0.675
0.675 × 100 = 67.5%
Letter Grade: D+ (passing grade)