If you scored 15 out of 20 on a test, you might be wondering what that means in terms of a percentage and letter grade. Converting your raw score into a percentage helps you understand how well you did — and how it compares to standard grading scales.
Let’s break it down step-by-step, show you the math, and help you calculate any score easily using TestGradesCalculator.com.
Step 2: Find the Letter Grade Equivalent
Most schools use a standard grading scale to convert percentages into letter grades.
| Percentage Range | Letter Grade | Grade Point (4.0 Scale) |
| 90–100% | A | 4.0 |
| 80–89% | B | 3.0 |
| 70–79% | C | 2.0 |
| 60–69% | D | 1.0 |
| Below 60% | F | 0.0 |
On this scale, a 75% corresponds to a C grade.
So, 15/20 = 75% = C.
This means your performance was average or slightly above passing, depending on your school’s grading policy.
Step 3: Understand What a 75% Means
A 75% indicates that you understood most of the material but have room for improvement. Here’s what that might mean:
- You got 3 out of 4 questions right, which is solid but not perfect.
- You’re performing at a competent level, but you can aim for an 80%+ to reach a B.
- Consistently scoring in the mid-70s shows steady progress, especially if the test was challenging.
If this test is heavily weighted, even a small score increase could improve your final grade significantly. You can estimate the impact using a Weighted Grade Calculator.
Step 4: Improve Your Test Scores
If you’re aiming to raise your score next time, try these strategies:
- Review missed questions to understand where mistakes happened.
- Practice similar problems before the next exam.
- Ask for feedback from your teacher.
- Use online grade tracking tools to see how each score affects your average.
- Focus on consistency: Small improvements add up quickly.
Step 5: Use an Online Test Grade Calculator
Instead of calculating percentages manually every time, you can use the free calculator at TestGradesCalculator.com.
Simply:
- Enter your points earned (15).
- Enter the total points (20).
- The calculator will instantly show your percentage and letter grade.
You can also calculate weighted scores, GPA, and final grades — all in one place.
Frequently Asked Questions (FAQ)
1. What is 15 out of 20 as a percentage?
It’s 75%. Divide 15 by 20, then multiply by 100.
2. What letter grade is 75%?
A 75% is typically a C grade on most grading scales.
3. Is 15/20 a passing grade?
Yes, 75% is generally considered a passing score in most schools.
4. How can I calculate my grade quickly?
Use an online tool like TestGradesCalculator.com to get instant results for any score.
5. Does 75% affect my GPA?
If converted to a letter grade (C), it usually equals a 2.0 GPA on a 4.0 scale.
Conclusion: 15/20 Is a 75% — A Solid C Grade
So, if you earned 15 out of 20, your grade is 75%, which equals a C. That’s a good foundation, and with a bit more preparation, you can easily move into the B or A range next time.To check how this score affects your overall class average or GPA, visit TestGradesCalculator.com and calculate it instantly.