Scores Out of 40 as Percentages

Every possible score on a 40-question test or assignment, converted to a percentage and letter grade. Click any row to see the full worked calculation.

Score Percentage Letter Grade Wrong
0/40 0% F 40
1/40 2.5% F 39
2/40 5% F 38
3/40 7.5% F 37
4/40 10% F 36
5/40 12.5% F 35
6/40 15% F 34
7/40 17.5% F 33
8/40 20% F 32
9/40 22.5% F 31
10/40 25% F 30
11/40 27.5% F 29
12/40 30% F 28
13/40 32.5% F 27
14/40 35% F 26
15/40 37.5% F 25
16/40 40% F 24
17/40 42.5% F 23
18/40 45% F 22
19/40 47.5% F 21
20/40 50% F 20
21/40 52.5% F 19
22/40 55% F 18
23/40 57.5% F 17
24/40 60% D 16
25/40 62.5% D 15
26/40 65% D 14
27/40 67.5% D 13
28/40 70% C 12
29/40 72.5% C 11
30/40 75% C 10
31/40 77.5% C 9
32/40 80% B 8
33/40 82.5% B 7
34/40 85% B 6
35/40 87.5% B 5
36/40 90% A 4
37/40 92.5% A 3
38/40 95% A 2
39/40 97.5% A 1
40/40 100% A 0

Use the Test Grade Calculator to interactively grade any 40-question test. Enter the number of questions wrong and get your score instantly, plus a printable grading-scale table.

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