What Grade Is 31 out of 40? (31/40)
31 out of 40 (31/40) is 77.5%, which rounds to 78%: a C on the 10 point and 7 point scales and a C+ with pluses and minuses. That is 9 wrong answers and 2.3 GPA points on the 4.0 scale.
- Percentage
- 77.5%
- rounds to 78%
- 10 point letter
- C
- C+ with +/-, C on 7 point
- Wrong
- 9
- of 40 questions
- 4.0 GPA
- 2.3
- for a C+
One more right, one fewer: 32/40 and 30/40
One more right makes it 32 out of 40, an 80%: a B on the 10 point scale and a B- with pluses and minuses. One fewer is 30 out of 40, a 75%, the same C. Each question is worth 2.5 percentage points.
The next letter up with pluses and minuses is a B- at 32/40 (80%), 1 more right answer away. That is also a B on the 10 point scale.
Right answers needed for each letter out of 40
| Letter | Percent | Right | From 31/40 |
|---|---|---|---|
| A | 93 to 100 | 38 or more | 7 more right |
| A- | 90 to under 93 | 36 or more | 5 more right |
| B+ | 87 to under 90 | 35 or more | 4 more right |
| B | 83 to under 87 | 34 or more | 3 more right |
| B- | 80 to under 83 | 32 or more | 1 more right |
| C+ | 77 to under 80 | 31 or more | your score |
| C | 73 to under 77 | 30 or more | 1 fewer |
| C- | 70 to under 73 | 28 or more | 2 fewer |
| D+ | 67 to under 70 | 27 or more | 4 fewer |
| D | 63 to under 67 | 26 or more | 5 fewer |
| D- | 60 to under 63 | 24 or more | 6 fewer |
| F | below 60 | 23 or fewer | 8 fewer |
Plus and minus scale; the 10 point letter is the plain letter. Every letter can happen with whole scores out of 40.
77.5% on other test lengths
No other common test length gives exactly 77.5%. The closest scores are 8 out of 10 (80%), 9 out of 12 (75%), 12 out of 15 (80%), 15 out of 20 (75%), 19 out of 25 (76%), 23 out of 30 (76.67%), 39 out of 50 (78%) and 46 out of 60 (76.67%).
Is 31 out of 40 passing?
Yes. Where passing starts at 60%, which is 24 right out of 40, 31/40 clears it by 7 questions. It also passes where the line is 70% (28 right), as on the 7 point scale. Whether a D passes the class is a separate rule, covered in the passing grade guide.
Out of 40 grade chart with 31/40 marked
| Score | Percent | 10 pt | +/- | 7 pt |
|---|---|---|---|---|
| 40/40 | 100% | A | A | A |
| 39/40 | 97.5% | A | A | A |
| 38/40 | 95% | A | A | A |
| 37/40 | 92.5% | A | A- | B |
| 36/40 | 90% | A | A- | B |
| 35/40 | 87.5% | B | B+ | B |
| 34/40 | 85% | B | B | B |
| 33/40 | 82.5% | B | B- | C |
| 32/40 | 80% | B | B- | C |
| 31/40 | 77.5% | C | C+ | C |
| 30/40 | 75% | C | C | C |
| 29/40 | 72.5% | C | C- | D |
| 28/40 | 70% | C | C- | D |
| 27/40 | 67.5% | D | D+ | F |
| 26/40 | 65% | D | D | F |
| 25/40 | 62.5% | D | D- | F |
| 24/40 | 60% | D | D- | F |
| 23/40 | 57.5% | F | F | F |
| 22/40 | 55% | F | F | F |
| 21/40 | 52.5% | F | F | F |
| 20/40 | 50% | F | F | F |
| 19/40 | 47.5% | F | F | F |
| 18/40 | 45% | F | F | F |
| 17/40 | 42.5% | F | F | F |
| 16/40 | 40% | F | F | F |
| 15/40 | 37.5% | F | F | F |
| 14/40 | 35% | F | F | F |
| 13/40 | 32.5% | F | F | F |
| 12/40 | 30% | F | F | F |
| 11/40 | 27.5% | F | F | F |
| 10/40 | 25% | F | F | F |
| 9/40 | 22.5% | F | F | F |
| 8/40 | 20% | F | F | F |
| 7/40 | 17.5% | F | F | F |
| 6/40 | 15% | F | F | F |
| 5/40 | 12.5% | F | F | F |
| 4/40 | 10% | F | F | F |
| 3/40 | 7.5% | F | F | F |
| 2/40 | 5% | F | F | F |
| 1/40 | 2.5% | F | F | F |
| 0/40 | 0% | F | F | F |
Whole scores; the printable out of 40 chart adds a lookup and a CSV download.
How to calculate 31 out of 40 as a percentage
Divide the number right by the number of questions, multiply by 100, then find the band on your school's scale. CurveFox reads the letter from the exact percent, the same rule as the grading scale chart.
Next step: put this test into your class grade with the grade calculator, see what the final needs with the final grade calculator, or curve a whole class with the grade curve calculator.
31/40 as a percent: worked example
You get 31 right on a 40 question test. What is the percent and the letter?
- 31 / 40 = 0.775
- 0.775 x 100 = 77.5%, 78% rounded to a whole percent
- 77.5 is in 70 to under 80 on the 10 point scale (C), 77 to under 80 with pluses and minuses (C+) and 75 to under 85 on the 7 point scale (C)
31/40 is 77.5%: a C on the 10 point and 7 point scales and a C+ with pluses and minuses.
Questions and answers
Is a 31 out of 40 a good grade?
77.5% is an average score on the 10 point scale (a C). An A takes 36 right, 5 more right answers than 31. It passes on every common scale.
What do I need for the next letter after 31/40?
32 right out of 40 (80%) is a B- with pluses and minuses, 1 more question than 31. That is also a B on the 10 point scale.
From CurveFox
Class grade calculators
All calculators