X Out of 30 as Grade and Percentage
Instant Answer (Above the Fold)
“X out of 30 as grade and percentage” means you have scored points out of 30 marks test. The purpose of this page is to support the Easy Grade Calculator by sharing relevant information for converting any score out of 30 into its exact percentage and corresponding letter grade. For example: 22 out of 30 as grade and percentage equals 73.33%.
Exact Formula (No Fluff)
Percentage = (Score ÷ 30) × 100
Divide the raw score by total points possible (30) and then multiply by 100 to get the percentage.
Full Conversion Table (0–30)
Typical grading scale used below (may vary):
A = 90–100% · B = 80–89% · C = 70–79% · D = 60–69% · F = below 60%
| Score (X/30) | Percentage | Grade |
|---|---|---|
| 30/30 | 100% | A |
| 29/30 | 96.67% | A |
| 28/30 | 93.33% | A |
| 27/30 | 90% | A |
| 26/30 | 86.67% | B |
| 25/30 | 83.33% | B |
| 24/30 | 80% | B |
| 23/30 | 76.67% | C |
| 22/30 | 73.33% | C |
| 21/30 | 70% | C |
| 20/30 | 66.67% | D |
| 19/30 | 63.33% | D |
| 18/30 | 60% | D |
| 17/30 | 56.67% | F |
| 16/30 | 53.33% | F |
| 15/30 | 50% | F |
| 14/30 | 46.67% | F |
| 13/30 | 43.33% | F |
| 12/30 | 40% | F |
| 11/30 | 36.67% | F |
| 10/30 | 33.33% | F |
| 9/30 | 30% | F |
| 8/30 | 26.67% | F |
| 7/30 | 23.33% | F |
| 6/30 | 20% | F |
| 5/30 | 16.67% | F |
| 4/30 | 13.33% | F |
| 3/30 | 10% | F |
| 2/30 | 6.67% | F |
| 1/30 | 3.33% | F |
| 0/30 | 0% | F |
⚠️ Note: Letter grades may vary by school, country or grading policy.
Worked Examples (Real Numbers Only)
Example 1: 13 out of 30
- Formula: (13 ÷ 30) × 100
- Calculation: 0.4333 × 100
- Final Percentage: 43.33%
- Typical Grade: F
Example 2: 18 out of 30
- Formula: (18 ÷ 30) × 100
- Calculation: 0.6 × 100
- Final Percentage: 60%
- Typical Grade: D
Example 3: 20 out of 30
- Formula: (20 ÷ 30) × 100
- Calculation: 0.6667 × 100
- Final Percentage: 66.67%
- Typical Grade: D
Example 4: 25 out of 30
- Formula: (25 ÷ 30) × 100
- Calculation: 0.8333 × 100
- Final Percentage: 83.33%
- Typical Grade: B
Common Mistakes When Converting X Out of 30
| Wrong Method | Correct Method | Why It’s Wrong |
|---|---|---|
| Dividing by 100 | Divide by 30 | 30 is the total score not 100 |
| Forgetting ×100 | Multiply after dividing | Without ×100, you get a decimal not a percent |
| Rounding too early | Round at the final step | Early rounding distorts the final grade |
| Assuming universal grade scales | Check your school policy | Grade boundaries differ by system |
This section alone eliminates most grading errors made by students.
Out of 30 Questions (Wrong Answers)
| Wrong Answers | Correct | Percentage | Grade |
|---|---|---|---|
| 0 | 30 | 100% | A |
| 1 | 29 | 96.67% | A |
| 2 | 28 | 93.33% | A |
| 3 | 27 | 90% | A |
| 4 | 26 | 86.67% | B |
| 5 | 25 | 83.33% | B |
| 6 | 24 | 80% | B |
| 7 | 23 | 76.67% | C |
| 8 | 22 | 73.33% | C |
| 9 | 21 | 70% | C |
| 10 | 20 | 66.67% | D |
| 11 | 19 | 63.33% | D |
| 12 | 18 | 60% | D |
| 13 | 17 | 56.67% | F |
| 14 | 16 | 53.33% | F |
| 15 | 15 | 50% | F |
| 16 | 14 | 46.67% | F |
| 17 | 13 | 43.33% | F |
| 18 | 12 | 40% | F |
| 19 | 11 | 36.67% | F |
| 20 | 10 | 33.33% | F |
| 21 | 9 | 30% | F |
| 22 | 8 | 26.67% | F |
| 23 | 7 | 23.33% | F |
| 24 | 6 | 20% | F |
| 25 | 5 | 16.67% | F |
| 26 | 4 | 13.33% | F |
| 27 | 3 | 10% | F |
| 28 | 2 | 6.67% | F |
| 29 | 1 | 3.33% | F |
| 30 | 0 | 0% | F |
Rounding Rules (Teachers Care About This)
- Round only the final percentage not the fraction.
- Example: 22/30 = 73.33% → usually shown as 73% or 73.3%.
- Do not round up grades automatically unless your school explicitly allows it.
- Some institutions round to whole numbers: others keep one decimal for accuracy.
Always follow the grading policy used by your school or board.
Author Experience & Opinion
By Raza
I have helped students and teachers resolve grading debates where a single rounding error changed a final letter grade. Most uncertainty comes from dividing by the wrong number or assuming every school uses the same scale. Clear formulas and consistent rules eliminates nonessential mistakes and clashes.
FAQs:
What grade is 24 out of 30?
24/30 = 80%, which is typically a B grade.
What grade is 26 out of 30?
26/30 = 86.67%, usually a B.
What grade is 27 out of 30?
27/30 = 90%, commonly an A.
What grade is 28 out of 30?
28/30 = 93.33%, an A in most systems.
What grade is 22 out of 30?
22/30 = 73.33%, typically a C grade.
Is 18 out of 30 a passing grade?
18/30 = 60%, which is often the minimum passing (D), depending on policy.
Does 26.5 out of 30 round up?
26.5/30 = 88.33%. Whether it rounds to an A depends entirely on school rules.
Is 30 out of 30 always 100%?
Yes. 30/30 equals 100% in every grading system.
Final Note
If you’re comparing scores like 24/30 grade percentage, 27 out of 30 as a grade or what grade is 18/30, use the table above not guesswork. Most grading errors come from incorrect division or false assumptions about letter grades.
This page exists to eliminate that.