Easy grader (EZ grader)

An easy grader turns the number wrong into a score: subtract the wrong answers from the number of questions, divide by the number of questions and multiply by 100. On a 25-question test with 3 wrong, that is (25 − 3) ÷ 25 × 100 = 88%, a B+ on the common US plus/minus scale, where B+ starts at 87%.

Set the number of questions, tap once for each wrong answer, then save and mark the next paper.

100%

A+

20 of 20 correct · 0 wrong

Questions on the test

Marking paper 1 · the class average starts with the first save

Number wrongType a number, or count a half-right answer as 0.5.Points per questionFor points off: 25 questions worth 100 points is 4.

Keys: W marks one wrong, U undoes, N saves the paper and starts the next, R resets this paper. They work when you are not typing in a field.

This marking session

Grade chart · 20 questions

Wrong	Score	Letter
0	100%	A+
1	95%	A
2	90%	A-
3	85%	B
4	80%	B-
5	75%	C
6	70%	C-
7	65%	D
8	60%	D-
9	55%	F
10	50%	F
11	45%	F
12	40%	F
13	35%	F
14	30%	F
15	25%	F
16	20%	F
17	15%	F
18	10%	F
19	5%	F
20	0%	F

Save a paper to start the class average and letter spread here. Print or download the chart.

Keep this marking session in this browser

Papers are numbered, never named. Nothing leaves your browser.

Count answers by

Letter scale: Common US plus/minus scale

Letter-grade scale

The plus/minus cutoffs Wikipedia lists for US colleges: A+ from 97%, A 93, A- 90, B+ 87, B 83, B- 80 and so on down to D- at 60. It is not universal, so use your syllabus's cutoffs when they differ. Source: Wikipedia, “Academic grading in the United States”.

Rounding and decimal places

Rounding before the letter grade

Follow your syllabus. A displayed percentage can round up while the unrounded score stays below a cutoff.

Decimal places in percentages

Only changes how results are shown. Extra places appear when rounding would push a score over a letter cutoff.

A letter typed as a score counts as the lowest percentage for that letter on this scale. Use the original percentage when you have it.

Check a single cutoff with the grading scale calculator.

Your grade chart

The chart uses the question count and cutoffs above. Each letter has its own color stripe.

Grading scales checked September 19, 2026. Sources are at the bottom of the page.

From wrong answers to a percentage

Subtract wrong answers from the total, then divide the correct answers by the total. Each question must be worth the same number of points.

Score % = (questions − wrong) ÷ questions × 100

Three wrong out of 25 leaves 22 correct. That is 88%. If a half-correct response earns half credit, count it as half wrong.

For questions with different point values, enter total points instead, or use the points grade calculator for several assignments.

Set the cutoffs before marking papers

The percentage is arithmetic. The letter depends on your class scale. Choose a named scale or enter your own cutoffs under “Letter scale”; use the rounding option only if it matches your policy.

The session keeps each saved paper's score, then shows the class average, the highest and lowest score and how many papers earned each letter. Download it as a CSV for your gradebook, or send the scores to the grade curve calculator to see what a curve would change.

The downloaded chart contains wrong answers, correct answers, percentages, letters and points off. It contains no student names. Changing cutoffs in the grading scale tool is a different policy choice from a curve.

Common test scores, from points to percent

For exact fractions and nearby outcomes, use the test grade calculator.

If you know how many points you earned, find the pair below. Choose it to see the letter using your selected class cutoffs.

Find a score such as 16 out of 20

Find earned or possible points

Points earned ÷ points possible × 100
Points	Percentage	Your class letter
16 out of 20	80%
15 out of 20	75%
17 out of 20	85%
14 out of 20	70%
18 out of 20	90%
12 out of 20	60%
27 out of 30	90%
24 out of 30	80%
25 out of 30	83.33%
20 out of 25	80%
12 out of 15	80%
13 out of 20	65%
19 out of 25	76%
13 out of 15	86.67%
40 out of 50	80%
21 out of 25	84%
9 out of 15	60%
28 out of 30	93.33%
45 out of 50	90%
23 out of 25	92%
34 out of 40	85%
36 out of 40	90%
9 out of 12	75%
30 out of 40	75%
43 out of 50	86%
15 out of 25	60%
32 out of 40	80%
8 out of 12	66.67%
20 out of 30	66.67%
35 out of 40	87.5%
18 out of 25	72%
22 out of 25	88%
39 out of 50	78%
7 out of 8	87.5%
5 out of 8	62.5%
21 out of 30	70%
7 out of 9	77.78%
28 out of 40	70%
31 out of 40	77.5%
22 out of 30	73.33%
33 out of 40	82.5%
19 out of 20	95%
35 out of 50	70%
7 out of 12	58.33%
41 out of 50	82%
38 out of 50	76%
16 out of 25	64%
42 out of 50	84%
30 out of 50	60%
8 out of 15	53.33%
11 out of 13	84.62%
37 out of 40	92.5%
9 out of 13	69.23%
36 out of 50	72%
44 out of 50	88%
50 out of 60	83.33%
24 out of 25	96%
18 out of 30	60%
14 out of 16	87.5%
10 out of 15	66.67%
8 out of 9	88.89%
34 out of 50	68%
48 out of 60	80%
52 out of 60	86.67%
16 out of 18	88.89%
15 out of 18	83.33%
9 out of 16	56.25%
10 out of 13	76.92%
14 out of 25	56%
19 out of 30	63.33%
17 out of 25	68%
18 out of 24	75%
54 out of 60	90%
12 out of 18	66.67%
37 out of 50	74%
23 out of 30	76.67%
7 out of 15	46.67%
12 out of 13	92.31%
10 out of 25	40%
13 out of 18	72.22%
14 out of 18	77.78%
6 out of 8	75%
7 out of 10	70%
11 out of 25	44%
32 out of 50	64%
56 out of 60	93.33%
25 out of 40	62.5%
10 out of 16	62.5%
38 out of 40	95%
3 out of 5	60%
19 out of 23	82.61%
6 out of 11	54.55%
31 out of 50	62%
40 out of 60	66.67%
3 out of 8	37.5%
6 out of 9	66.67%
11 out of 15	73.33%
20 out of 24	83.33%
45 out of 60	75%
18 out of 22	81.82%
14 out of 15	93.33%
47 out of 50	94%
42 out of 60	70%
13 out of 25	52%
29 out of 30	96.67%
51 out of 60	85%
17 out of 18	94.44%
10 out of 14	71.43%
55 out of 60	91.67%
3 out of 4	75%
28 out of 35	80%
1 out of 16	6.25%
15 out of 21	71.43%
70 out of 80	87.5%
30 out of 35	85.71%
55 out of 70	78.57%
39 out of 40	97.5%
17 out of 21	80.95%
29 out of 40	72.5%
28 out of 50	56%
17 out of 23	73.91%
27 out of 35	77.14%
22 out of 35	62.86%
160 out of 200	80%
22 out of 27	81.48%
20 out of 26	76.92%
15 out of 22	68.18%
26 out of 30	86.67%
29 out of 50	58%
28 out of 32	87.5%
10 out of 12	83.33%
4 out of 5	80%
24 out of 35	68.57%
21 out of 26	80.77%
6 out of 15	40%
11 out of 20	55%
1 out of 8	12.5%
19 out of 24	79.17%
14 out of 19	73.68%
22 out of 28	78.57%
2 out of 5	40%
13 out of 19	68.42%
25 out of 35	71.43%
26 out of 40	65%
16 out of 30	53.33%
17 out of 30	56.67%
12 out of 17	70.59%
18 out of 21	85.71%
14 out of 17	82.35%
24 out of 40	60%
23 out of 28	82.14%
13 out of 17	76.47%
60 out of 75	80%
15 out of 17	88.24%
22 out of 50	44%
46 out of 60	76.67%
3 out of 7	42.86%
32 out of 35	91.43%
21 out of 35	60%
16 out of 19	84.21%
1 out of 5	20%
31 out of 35	88.57%
30 out of 45	66.67%
9 out of 20	45%
12 out of 14	85.71%
1 out of 36	2.78%
72 out of 80	90%
13 out of 14	92.86%
18 out of 26	69.23%
19 out of 26	73.08%
6 out of 20	30%
1 out of 4	25%
17.5 out of 20	87.5%
16 out of 21	76.19%
17 out of 24	70.83%
16 out of 22	72.73%
7 out of 13	53.85%
22 out of 24	91.67%
15 out of 19	78.95%
29 out of 35	82.86%
56 out of 70	80%
27 out of 40	67.5%
48 out of 50	96%
23 out of 35	65.71%
12 out of 16	75%
18 out of 28	64.29%
22 out of 26	84.62%
18 out of 23	78.26%
4 out of 11	36.36%
12 out of 25	48%
19 out of 21	90.48%
11 out of 14	78.57%
64 out of 80	80%
1 out of 3	33.33%
2 out of 3	66.67%
3.5 out of 4	87.5%
3.5 out of 5	70%
1 out of 6	16.67%
2 out of 6	33.33%
3 out of 6	50%
4 out of 6	66.67%
5 out of 6	83.33%
2 out of 7	28.57%
4 out of 7	57.14%
5 out of 7	71.43%
6 out of 7	85.71%
2 out of 8	25%
4 out of 8	50%
8 out of 8	100%
2 out of 9	22.22%
3 out of 9	33.33%
4 out of 9	44.44%
5 out of 9	55.56%
2 out of 10	20%
3 out of 10	30%
4 out of 10	40%
5 out of 10	50%
6 out of 10	60%
8 out of 10	80%
9 out of 10	90%
1 out of 11	9.09%
3 out of 11	27.27%
5 out of 11	45.45%
7 out of 11	63.64%
8 out of 11	72.73%
9 out of 11	81.82%
10 out of 11	90.91%
2 out of 12	16.67%
3 out of 12	25%
4 out of 12	33.33%
5 out of 12	41.67%
6 out of 12	50%
11 out of 12	91.67%
4 out of 13	30.77%
5 out of 13	38.46%
6 out of 13	46.15%
8 out of 13	61.54%
3 out of 14	21.43%
4 out of 14	28.57%
5 out of 14	35.71%
6 out of 14	42.86%
7 out of 14	50%
8 out of 14	57.14%
9 out of 14	64.29%
14 out of 14	100%
1 out of 15	6.67%
2 out of 15	13.33%
3 out of 15	20%
5 out of 15	33.33%
13.5 out of 15	90%
15 out of 15	100%
2 out of 16	12.5%
3 out of 16	18.75%
4 out of 16	25%
5 out of 16	31.25%
6 out of 16	37.5%
7 out of 16	43.75%
11 out of 16	68.75%
13 out of 16	81.25%
15 out of 16	93.75%
4 out of 17	23.53%
5 out of 17	29.41%
6 out of 17	35.29%
7 out of 17	41.18%
8 out of 17	47.06%
10 out of 17	58.82%
11 out of 17	64.71%
16 out of 17	94.12%
5 out of 18	27.78%
6 out of 18	33.33%
7 out of 18	38.89%
8 out of 18	44.44%
10 out of 18	55.56%
11 out of 18	61.11%
11 out of 19	57.89%
12 out of 19	63.16%
17 out of 19	89.47%
18 out of 19	94.74%
1 out of 20	5%
2 out of 20	10%
3 out of 20	15%
4 out of 20	20%
5 out of 20	25%
7 out of 20	35%
8 out of 20	40%
10 out of 20	50%
15.5 out of 20	77.5%
18.5 out of 20	92.5%
20 out of 20	100%
11 out of 21	52.38%
12 out of 21	57.14%
13 out of 21	61.9%
14 out of 21	66.67%
20 out of 21	95.24%
12 out of 22	54.55%
13 out of 22	59.09%
14 out of 22	63.64%
17 out of 22	77.27%
19 out of 22	86.36%
20 out of 22	90.91%
21 out of 22	95.45%
12 out of 23	52.17%
13 out of 23	56.52%
14 out of 23	60.87%
15 out of 23	65.22%
16 out of 23	69.57%
20 out of 23	86.96%
21 out of 23	91.3%
22 out of 23	95.65%
11 out of 24	45.83%
12 out of 24	50%
13 out of 24	54.17%
14 out of 24	58.33%
15 out of 24	62.5%
16 out of 24	66.67%
21 out of 24	87.5%
23 out of 24	95.83%
3 out of 25	12%
5 out of 25	20%
6 out of 25	24%
7 out of 25	28%
8 out of 25	32%
9 out of 25	36%
25 out of 25	100%
14 out of 26	53.85%
15 out of 26	57.69%
16 out of 26	61.54%
17 out of 26	65.38%
23 out of 26	88.46%
24 out of 26	92.31%
25 out of 26	96.15%
14 out of 27	51.85%
18 out of 27	66.67%
19 out of 27	70.37%
20 out of 27	74.07%
21 out of 27	77.78%
23 out of 27	85.19%
24 out of 27	88.89%
25 out of 27	92.59%
26 out of 27	96.3%
12 out of 28	42.86%
16 out of 28	57.14%
17 out of 28	60.71%
19 out of 28	67.86%
20 out of 28	71.43%
21 out of 28	75%
24 out of 28	85.71%
25 out of 28	89.29%
26 out of 28	92.86%
27 out of 28	96.43%
20 out of 29	68.97%
22 out of 29	75.86%
23 out of 29	79.31%
25 out of 29	86.21%
26 out of 29	89.66%
28 out of 29	96.55%
6 out of 30	20%
7 out of 30	23.33%
8 out of 30	26.67%
9 out of 30	30%
10 out of 30	33.33%
11 out of 30	36.67%
12 out of 30	40%
13 out of 30	43.33%
14 out of 30	46.67%
15 out of 30	50%
24 out of 31	77.42%
25 out of 31	80.65%
26 out of 31	83.87%
27 out of 31	87.1%
28 out of 31	90.32%
29 out of 31	93.55%
16 out of 32	50%
20 out of 32	62.5%
21 out of 32	65.63%
22 out of 32	68.75%
23 out of 32	71.88%
24 out of 32	75%
25 out of 32	78.13%
26 out of 32	81.25%
27 out of 32	84.38%
29 out of 32	90.63%
30 out of 32	93.75%
31 out of 32	96.88%
18 out of 33	54.55%
20 out of 33	60.61%
21 out of 33	63.64%
22 out of 33	66.67%
23 out of 33	69.7%
24 out of 33	72.73%
25 out of 33	75.76%
26 out of 33	78.79%
27 out of 33	81.82%
28 out of 33	84.85%
29 out of 33	87.88%
30 out of 33	90.91%
31 out of 33	93.94%
32 out of 33	96.97%
22 out of 34	64.71%
23 out of 34	67.65%
24 out of 34	70.59%
26 out of 34	76.47%
27 out of 34	79.41%
28 out of 34	82.35%
29 out of 34	85.29%
30 out of 34	88.24%
31 out of 34	91.18%
32 out of 34	94.12%
9 out of 35	25.71%
19 out of 35	54.29%
20 out of 35	57.14%
26 out of 35	74.29%
33 out of 35	94.29%
34 out of 35	97.14%
22 out of 36	61.11%
23 out of 36	63.89%
24 out of 36	66.67%
25 out of 36	69.44%
26 out of 36	72.22%
27 out of 36	75%
28 out of 36	77.78%
29 out of 36	80.56%
30 out of 36	83.33%
31 out of 36	86.11%
32 out of 36	88.89%
33 out of 36	91.67%
26 out of 37	70.27%
33 out of 37	89.19%
35 out of 37	94.59%
26 out of 38	68.42%
28 out of 38	73.68%
30 out of 38	78.95%
31 out of 38	81.58%
32 out of 38	84.21%
34 out of 38	89.47%
35 out of 38	92.11%
30 out of 39	76.92%
8 out of 40	20%
15 out of 40	37.5%
20 out of 40	50%
22 out of 40	55%
23 out of 40	57.5%
31 out of 41	75.61%
37 out of 41	90.24%
30 out of 42	71.43%
34 out of 42	80.95%
35 out of 42	83.33%
36 out of 42	85.71%
38 out of 42	90.48%
39 out of 42	92.86%
38 out of 44	86.36%
31 out of 45	68.89%
32 out of 45	71.11%
33 out of 45	73.33%
34 out of 45	75.56%
35 out of 45	77.78%
36 out of 45	80%
37 out of 45	82.22%
38 out of 45	84.44%
39 out of 45	86.67%
40 out of 45	88.89%
41 out of 45	91.11%
42 out of 45	93.33%
38 out of 46	82.61%
38 out of 48	79.17%
42 out of 48	87.5%
44 out of 48	91.67%
6 out of 50	12%
7 out of 50	14%
11 out of 50	22%
18 out of 50	36%
20 out of 50	40%
23 out of 50	46%
25 out of 50	50%
26 out of 50	52%
27 out of 50	54%
33 out of 50	66%
46 out of 50	92%
49 out of 50	98%
44 out of 52	84.62%
46 out of 52	88.46%
47 out of 52	90.38%
46 out of 54	85.19%
40 out of 55	72.73%
42 out of 55	76.36%
43 out of 55	78.18%
44 out of 55	80%
45 out of 55	81.82%
46 out of 55	83.64%
47 out of 55	85.45%
48 out of 55	87.27%
49 out of 55	89.09%
50 out of 55	90.91%
36 out of 60	60%
38 out of 60	63.33%
39 out of 60	65%
41 out of 60	68.33%
43 out of 60	71.67%
44 out of 60	73.33%
47 out of 60	78.33%
49 out of 60	81.67%
53 out of 60	88.33%
57 out of 60	95%
58 out of 60	96.67%
45 out of 65	69.23%
53 out of 65	81.54%
48 out of 70	68.57%
50 out of 70	71.43%
52 out of 70	74.29%
53 out of 70	75.71%
54 out of 70	77.14%
58 out of 70	82.86%
60 out of 70	85.71%
62 out of 70	88.57%
64 out of 70	91.43%
65 out of 70	92.86%
68 out of 70	97.14%
50 out of 75	66.67%
51 out of 75	68%
54 out of 75	72%
55 out of 75	73.33%
56 out of 75	74.67%
57 out of 75	76%
58 out of 75	77.33%
61 out of 75	81.33%
63 out of 75	84%
64 out of 75	85.33%
65 out of 75	86.67%
66 out of 75	88%
68 out of 75	90.67%
70 out of 75	93.33%
56 out of 80	70%
58 out of 80	72.5%
60 out of 80	75%
62 out of 80	77.5%
65 out of 80	81.25%
66 out of 80	82.5%
67 out of 80	83.75%
68 out of 80	85%
69 out of 80	86.25%
71 out of 80	88.75%
74 out of 80	92.5%
75 out of 80	93.75%
76 out of 80	95%
78 out of 80	97.5%
66 out of 90	73.33%
70 out of 90	77.78%
50 out of 100	50%
56 out of 100	56%
58 out of 100	58%
60 out of 100	60%
61 out of 100	61%
62 out of 100	62%
63 out of 100	63%
64 out of 100	64%
65 out of 100	65%
67 out of 100	67%
68 out of 100	68%
70 out of 100	70%
71 out of 100	71%
72 out of 100	72%
73 out of 100	73%
74 out of 100	74%
75 out of 100	75%
76 out of 100	76%
78 out of 100	78%
80 out of 100	80%
81 out of 100	81%
82 out of 100	82%
84 out of 100	84%
85 out of 100	85%
86 out of 100	86%
88 out of 100	88%
89 out of 100	89%
90 out of 100	90%
91 out of 100	91%
92 out of 100	92%
93 out of 100	93%
94 out of 100	94%
110 out of 130	84.62%
100 out of 150	66.67%
114 out of 150	76%
115 out of 150	76.67%
120 out of 150	80%
130 out of 150	86.67%
132 out of 150	88%
135 out of 150	90%
140 out of 150	93.33%
120 out of 200	60%
140 out of 200	70%
150 out of 200	75%
170 out of 200	85%
175 out of 200	87.5%
180 out of 200	90%
2 out of 4	50%
5 out of 5	100%
1 out of 9	11.11%
1 out of 12	8.33%
12 out of 12	100%
1 out of 13	7.69%
1 out of 14	7.14%
0 out of 15	0%
16 out of 16	100%
1 out of 17	5.88%
2 out of 17	11.76%
3 out of 17	17.65%
1 out of 18	5.56%
18 out of 18	100%
1 out of 19	5.26%
2 out of 21	9.52%
0 out of 25	0%
1 out of 25	4%
3 out of 26	11.54%
0 out of 27	0%
24 out of 29	82.76%
1 out of 30	3.33%
2 out of 30	6.67%
30 out of 30	100%
31 out of 31	100%
33 out of 33	100%
18 out of 35	51.43%
35 out of 35	100%
20 out of 36	55.56%
21 out of 36	58.33%
21 out of 39	53.85%
1 out of 40	2.5%
40 out of 40	100%
18 out of 41	43.9%
20 out of 42	47.62%
1 out of 45	2.22%
43 out of 45	95.56%
36 out of 46	78.26%
0 out of 50	0%
1 out of 50	2%
50 out of 50	100%
38 out of 51	74.51%
30 out of 53	56.6%
34 out of 55	61.82%
38 out of 55	69.09%
53 out of 55	96.36%
12 out of 58	20.69%
20 out of 60	33.33%
60 out of 60	100%
18 out of 61	29.51%
14 out of 62	22.58%
64 out of 64	100%
37 out of 65	56.92%
48 out of 65	73.85%
55 out of 65	84.62%
60 out of 65	92.31%
66 out of 66	100%
14 out of 68	20.59%
18 out of 70	25.71%
20 out of 70	28.57%
41 out of 70	58.57%
51 out of 70	72.86%
57 out of 70	81.43%
61 out of 70	87.14%
66 out of 70	94.29%
67 out of 70	95.71%
70 out of 70	100%
56 out of 72	77.78%
65 out of 72	90.28%
21 out of 73	28.77%
14 out of 75	18.67%
46 out of 75	61.33%
62 out of 75	82.67%
69 out of 75	92%
73 out of 75	97.33%
75 out of 75	100%
78 out of 78	100%
5 out of 80	6.25%
16 out of 80	20%
18 out of 80	22.5%
55 out of 80	68.75%
73 out of 80	91.25%
84 out of 84	100%
85 out of 85	100%
81 out of 86	94.19%
77 out of 87	88.51%
5 out of 90	5.56%
23 out of 90	25.56%
41 out of 90	45.56%
82 out of 90	91.11%
83 out of 90	92.22%
90 out of 90	100%
20 out of 92	21.74%
21 out of 93	22.58%
25 out of 93	26.88%
17 out of 97	17.53%
20 out of 97	20.62%
14 out of 100	14%
30 out of 100	30%
66 out of 100	66%
77 out of 100	77%
79 out of 100	79%
83 out of 100	83%
87 out of 100	87%
95 out of 100	95%
96 out of 100	96%
97 out of 100	97%
98 out of 100	98%
100 out of 100	100%
55 out of 102	53.92%
20 out of 104	19.23%
86 out of 106	81.13%
7 out of 107	6.54%
20 out of 113	17.7%
20 out of 118	16.95%
20 out of 123	16.26%
17 out of 124	13.71%
26 out of 125	20.8%
9 out of 132	6.82%
110 out of 135	81.48%
121 out of 136	88.97%
58 out of 137	42.34%
20 out of 138	14.49%
6 out of 139	4.32%
39 out of 140	27.86%
26 out of 145	17.93%
31 out of 147	21.09%
41 out of 148	27.7%
14 out of 149	9.4%
9 out of 150	6%
52 out of 150	34.67%
106 out of 156	67.95%
143 out of 160	89.38%
118 out of 180	65.56%
43 out of 183	23.5%
17 out of 185	9.19%
17 out of 189	8.99%
21 out of 195	10.77%
18 out of 198	9.09%
36 out of 200	18%
184 out of 200	92%