10 out of 15 is 66.7%, which is a D on the standard US scale. It passes, but only one more wrong answer (9 correct, 60%) leaves you on the D− pass line and two more fails the test.
10 out of 15 in percentage and letter grade
Ten correct out of fifteen is 66.67%. The D band runs from 63% to 66.99% on the standard scale, so this score sits at the very top of a D.
It is a pass, but a narrow one. One more wrong answer takes the score to 60%, the lowest passing grade, and another takes it to 53.3%, an F.
| Correct | Percentage | Letter grade | Note |
|---|---|---|---|
| 14 | 93.3% | A | One wrong allowed |
| 13 | 86.7% | B | Straight B |
| 12 | 80% | B− | Comfortable |
| 11 | 73.3% | C | Solid pass |
| 10 | 66.7% | D | Narrow pass |
| 9 | 60% | D− | Lowest pass |
| 8 | 53.3% | F | Fail |
How close is this to failing?
Very close. Two questions separate a 66.7% D from a 53.3% F on a 15-question test, because each question carries 6.67 percentage points.
That is the trade-off of a short test: the scores look forgiving because there are few questions, but every single answer moves the grade by a lot.
Using this score to plan the next test
If this paper is one of several, the average matters more than the single score. Add every grade you have to the average grade calculator to see where the course stands, then use the grade calculator to find the score the next test needs.
Check whether the class uses weighted categories first. If homework is 20% and exams 50%, a low test score pulls the course grade further than a plain average suggests.
Look up another score
Enter any result in the score out of X converter for the percentage and letter grade, or see the complete chart on the grading scale for 15 questions.
Frequently Asked Questions
What is 10 out of 15 as a percentage?+
10 out of 15 is 66.67%. Divide 10 by 15 to get 0.6667, then multiply by 100.
Is 10 out of 15 a passing grade?+
Yes, but barely. 66.7% is a D and the lowest pass is 60%, so you have only one question of headroom.
What is a failing score on a 15-question test?+
Anything below 9 correct. Nine correct is 60%, the lowest passing grade, and 8 correct is 53.3%, an F.
What is 11 out of 15?+
11 out of 15 is 73.3%, a C.
Muhammd Salman
I build and maintain Grade Calculator independently. Every worked example on this site is checked against the underlying formula, with notes on where school or instructor policy can change the result. More about this site →