Grading Calculator by Points
Enter two values: how many points are possible and how many were lost. Half points work here, and as you type the percent and letter change.
The plus-minus scale begins with A+ 97 · A 93 · A− 90. Then comes B+ 87 · B 83 and B− 80. Next is C+ 77 · C 73 and C− 70. Last come D+ 67 · D 63 and D− 60. A score below 60 gets an F.
F is anything below the lowest cut-off.
Cut-offs must go down from A+ to D−.
Chart of grades for 50 points
| Lost | Earned | Percent | Grade |
|---|---|---|---|
| 0 | 50 | 100% | A+ |
| 1 | 49 | 98% | A+ |
| 2 | 48 | 96% | A |
| 3 | 47 | 94% | A |
| 4 | 46 | 92% | A− |
| 5 | 45 | 90% | A− |
| 6 | 44 | 88% | B+ |
| 7 | 43 | 86% | B |
| 8 | 42 | 84% | B |
| 9 | 41 | 82% | B− |
| 10 | 40 | 80% | B− |
| 11 | 39 | 78% | C+ |
| 12 | 38 | 76% | C |
| 13 | 37 | 74% | C |
| 14 | 36 | 72% | C− |
| 15 | 35 | 70% | C− |
| 16 | 34 | 68% | D+ |
| 17 | 33 | 66% | D |
| 18 | 32 | 64% | D |
| 19 | 31 | 62% | D− |
| 20 | 30 | 60% | D− |
| 21 | 29 | 58% | F |
| 22 | 28 | 56% | F |
| 23 | 27 | 54% | F |
| 24 | 26 | 52% | F |
| 25 | 25 | 50% | F |
| 26 | 24 | 48% | F |
| 27 | 23 | 46% | F |
| 28 | 22 | 44% | F |
| 29 | 21 | 42% | F |
| 30 | 20 | 40% | F |
| 31 | 19 | 38% | F |
| 32 | 18 | 36% | F |
| 33 | 17 | 34% | F |
| 34 | 16 | 32% | F |
| 35 | 15 | 30% | F |
| 36 | 14 | 28% | F |
| 37 | 13 | 26% | F |
| 38 | 12 | 24% | F |
| 39 | 11 | 22% | F |
| 40 | 10 | 20% | F |
| 41 | 9 | 18% | F |
| 42 | 8 | 16% | F |
| 43 | 7 | 14% | F |
| 44 | 6 | 12% | F |
| 45 | 5 | 10% | F |
| 46 | 4 | 8% | F |
| 47 | 3 | 6% | F |
| 48 | 2 | 4% | F |
| 49 | 1 | 2% | F |
| 50 | 0 | 0% | F |
How many points each letter allows you to lose
| Letter | 50 points | 100 points | 300 points | 500 points |
|---|---|---|---|---|
| A+ | 1.5 | 3 | 9 | 15 |
| A | 3.5 | 7 | 21 | 35 |
| A− | 5 | 10 | 30 | 50 |
| B+ | 6.5 | 13 | 39 | 65 |
| B | 8.5 | 17 | 51 | 85 |
| B− | 10 | 20 | 60 | 100 |
| C+ | 11.5 | 23 | 69 | 115 |
| C | 13.5 | 27 | 81 | 135 |
| C− | 15 | 30 | 90 | 150 |
| D+ | 16.5 | 33 | 99 | 165 |
| D | 18.5 | 37 | 111 | 185 |
| D− | 20 | 40 | 120 | 200 |
Counting by points or by questions: when the grade differs
Points and questions give the same percent only if every question counts the same.
Suppose a test has 18 one-point questions plus one two-point question, adding up to 20 points. Only missing the two-point question yields 18 ÷ 20 = 90% by points, an A−, while 18 ÷ 19 = 94.7% by questions, so the grade is an A.
If the questions have different weights, use points to grade.
Partial credit and half points
To type a half point, enter .5, such as 2.5 points lost. Those + and − buttons change the field in half point steps.
To get the percent, divide what you earned by the points possible, then multiply by 100. The letter follows that exact percent: 44.5 out of 50 (89%) earns a B+.