X out of 20 — Grade and Percentage (clear and practical guide)
This calculator guide explains how you can check your grade and percentage for X out of 20 score within blink of an eye. It’s for students and teachers who need precise calculations(for report cards, marking or checking test results). The formula is easy, the math is accurate and tools like Easy Grade Calculator automate every step including decimals and custom grade scales so you don’t waste time on round up the numbers or lookup.
The formula (straightforward)
To convert X out of 20 to a percentage:
Or you can simply multiply your obtanied score by 5 (X × 5) to get percentage:
Example calculation, digit-by-digit
Convert 14/20:
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14 ÷ 20 = 0.7
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0.7 × 100 = 70%
Or simply: 14 × 5 = 70%
A common letter-grade scale (one widely used standard)
Grading scales vary by school. This is very common one that is almost used by every academic institution
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A+: 97–100%
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A : 93–96%
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A-: 90–92%
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B+: 87–89%
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B : 83–86%
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B-: 80–82%
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C+: 77–79%
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C : 73–76%
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C-: 70–72%
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D : 60–69%
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F : < 60%
Note: If your institution uses a different cut-off (e.g. A starts at 90%), change the breakpoints in Easy Grade Calculator and it will recalculate instantly.
Full lookup table: X/20 → Percentage → Letter grade
(Using the grade scale above; percentage = X × 5)
| Correct (X/20) | Wrong | Percentage | Letter Grade |
|---|---|---|---|
| 20 | 0 | 100% | A+ |
| 19 | 1 | 95% | A |
| 18 | 2 | 90% | A- |
| 17 | 3 | 85% | B |
| 16 | 4 | 80% | B- |
| 15 | 5 | 75% | C |
| 14 | 6 | 70% | C- |
| 13 | 7 | 65% | D |
| 12 | 8 | 60% | D |
| 11 | 9 | 55% | F |
| 10 | 10 | 50% | F |
| 9 | 11 | 45% | F |
| 8 | 12 | 40% | F |
| 7 | 13 | 35% | F |
| 6 | 14 | 30% | F |
| 5 | 15 | 25% | F |
| 4 | 16 | 20% | F |
| 3 | 17 | 15% | F |
| 2 | 18 | 10% | F |
| 1 | 19 | 5% | F |
| 0 | 20 | 0% | F |
Decimal and mid marks (exact examples)
Many tests return half-marks or quarter-marks. Use the same rule: multiply by 5.
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17.5 / 20 → 17.5 × 5 = 87.5% → B+
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15.5 / 20 → 15.5 × 5 = 77.5% → C+
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14.25 / 20 → 14.25 × 5 = 71.25% → C-
Example: “6 wrong out of 20”
If 6 answers are wrong: 14/20 → 14 × 5 = 70% → C-.
How Easy Grade Calculator helps (practical value)
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Auto-calculates percentage from any X/20 (including decimals). No manual multiplication.
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Instant letter-grade lookup using your chosen grading scale (customizable breakpoints).
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Handles “correct vs wrong” input (enter number wrong the tool computes correct and percentage).
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Rounds or shows exact decimals depending on your preference (useful for borderline cases like 71.25%).
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Saves time for teachers marking dozens of papers exportable tables and printable reports.
Bottom line: instead of doing X × 5 for every student and double-checking rounding, Easy Grade Calculator produces a clean class table in seconds.
Short sample classroom case studies
These are sample case studies you can adapt or replace with your real classroom notes.
Case study A: High-stakes quiz (20 points)
A teacher conducted a 20 marks physiology test. Out of 17 students 5 sored18, 3 had 16 and 9 got 12 marks. Use the table:
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18/20 → 90% → A-
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16/20 → 80% → B-
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12/20 → 60% → D
Using Easy Grade Calculator, the teacher exported the class breakdown and identified 12/20 students who needed targeted review in Topic.
Case study B :Partial-credit exam (half marks allowed)
A tutor awarded half marks for some problems. Two students scored 17.5/20 and 14.25/20.
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17.5 → 87.5% → B+
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14.25 → 71.25% → C-
Showing exact values helped the tutor decide whether to round 71.25 up or keep exact score based on syllabus rules.
Opinion & practical advice
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Don’t rely on raw percentages alone. Context matters (test difficulty, class average). A 75% (15/20) might be excellent on a notoriously hard test.
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Use a clear published grade-cutoff policy so students know where they stand (and so you don’t get endless “can you round me up?” emails).
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Automate repetitive marking. If you’re a teacher, using a grade calculator removes human arithmetic errors and gives you time for meaningful feedback.
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Handle decimals consistently. Before checking the tests determine if you have to round of the figures such as 71.25 round to 71 or 71.3 or keep exact. Put that rule in your syllabus.
Final checklist for teachers & students
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Use Percentage = X × 5 for X/20 every time.
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Publish your letter-grade breakpoints (so students know the thresholds).
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If you use decimals, decide rounding rules ahead of time.
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Use a tool like Easy Grade Calculator to batch-calculate and export results.
FAQs
What is 16 out of 20 as a percentage?
80%.
What is 15 out of 20 as a percentage?
75%.
What grade is 17 out of 20?
85% → B (by typical scale).
What is 19 out of 20 as a grade?
95% → A.
What is 11 out of 20 as a percentage grade?
55% → F.
Is 16/20 a good grade?
16/20 = 80% → usually considered good (B-), but “good” depends on course standards.
What is 18/20 in percentage?
90% (often A-).
What is 17.5/20 as a percentage?
87.5% (B+).
What is 14/20 percentage grade?
70% (C-).
What is 16/20 as a percentage?
16 × 5 = 80%.
What is 16/20 as a grade?
Using the scale above: B-.
What is 15/20 as a percentage?
15 × 5 = 75% → C.
What is 17/20 as a percentage/letter grade?
85% → B.
What is 18/20 as a percentage / is 18/20 an A?
18 × 5 = 90%, which is A- on the scale above (not a straight A under this common scale). Some schools treat 90% as A; check your local cutoffs.
What is 13/20 as a percentage/grade?
65% → D.
What is 4/20 as a percentage?
20% → F.
What is 14/20 as a percentage?
70% → C-.