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@slowkow
Last active August 29, 2015 14:06
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Illumina v1.8+ Phred base quality scores. https://plot.ly/~slowkow/2/

P is the probability of a base-call error.

Q P Symbol ASCII
1 0.79433 " 34
2 0.63096 # 35
3 0.50119 $ 36
4 0.39811 % 37
5 0.31623 & 38
6 0.25119 ' 39
7 0.19953 ( 40
8 0.15849 ) 41
9 0.12589 * 42
10 0.10000 + 43
11 0.07943 | 44
12 0.06310 - 45
13 0.05012 . 46
14 0.03981 / 47
15 0.03162 0 48
16 0.02512 1 49
17 0.01995 2 50
18 0.01585 3 51
19 0.01259 4 52
20 0.01000 5 53
21 0.00794 6 54
22 0.00631 7 55
23 0.00501 8 56
24 0.00398 9 57
25 0.00316 : 58
26 0.00251 ; 59
27 0.00200 < 60
28 0.00158 = 61
29 0.00126 > 62
30 0.00100 ? 63
31 0.00079 @ 64
32 0.00063 A 65
33 0.00050 B 66
34 0.00040 C 67
35 0.00032 D 68
36 0.00025 E 69
37 0.00020 F 70
38 0.00016 G 71
39 0.00013 H 72
40 0.00010 I 73
41 0.00008 J 74
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