15-Question Test Grade Calculator
15-question tests are common for quick quizzes and checkpoint assessments. Enter how many you missed to see your percentage and letter grade instantly.
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15-Question Test Score Chart
A complete reference table showing all possible scores. Each wrong answer costs exactly 6.67% (since 100 ÷ 15 = 6.666...). Percentages are rounded to one decimal place. Your current performance is highlighted.
| Wrong | Correct | Percentage | Grade |
|---|
How This Is Calculated
Example: On a 15-question test, you answer 12 correctly (3 wrong):
Score = (12 / 15) × 100 = 0.8 × 100 = 80.0% (B grade)
The letter grade cutoffs follow the standard US grading scale: A (90–100%), B (80–89%), C (70–79%), D (60–69%), F (below 60%). However, grading scales vary by school and instructor, so verify with your syllabus.
Frequently Asked Questions
What is 12 out of 15 as a percentage and letter grade?
12 out of 15 is 80.0%, which is a B. You can check the score chart above to verify this and see all other possible scores.
What is 13 out of 15 as a percentage and letter grade?
13 out of 15 is 86.7%, which is a B. You can check the score chart above to verify this and see all other possible scores.
Why isn't each question worth a round number of points on a 15-question test?
Because 100 divided by 15 is 6.67 (a repeating decimal). Each wrong answer costs exactly 6.67 percentage points. That's why you'll see percentages like 80.0%, 86.7%, 93.3% on a 15-question test. They're mathematically correct. The score chart shows all percentages to one decimal place for accuracy.
How many questions can I miss on a 15-question test and still get an A?
You can miss at most 1 question. Missing 2 questions gives you 13/15 = 86.7%, which is a B. Missing just 1 or none gives you 93.3% or higher, which is an A.
On a 15-question test, is 70% a passing grade?
70% is typically considered a passing grade at most schools (it's a C). On a 15-question test, 70% means you got approximately 10-11 questions correct. However, check your school's or instructor's minimum passing grade, as some require 60% or 75%.
Sources
Grading scale note: This calculator uses the standard US grading scale: A (90–100%), B (80–89%), C (70–79%), D (60–69%), F (<60%). Some schools use different thresholds, so check your course syllabus for your instructor's exact scale.