Paste or type your own Phred+33 encoded quality string (used by Sanger and new Illumina sequencing) into the input below to decode it. Learn more about Phred quality scores on Wikipedia.
| Encoded | Phred Quality | Probability of incorrect base call | Base call accuracy |
|---|---|---|---|
| ! | 0 | 1 | 0% |
| " | 1 | 0.79432823 | 20.56717653% |
| # | 2 | 0.63095734 | 36.90426555% |
| $ | 3 | 0.50118723 | 49.88127664% |
| % | 4 | 0.39810717 | 60.18928294% |
| & | 5 | 0.31622777 | 68.3772234% |
| ' | 6 | 0.25118864 | 74.88113568% |
| ( | 7 | 0.19952623 | 80.04737685% |
| ) | 8 | 0.15848932 | 84.15106808% |
| * | 9 | 0.12589254 | 87.41074588% |
| + | 10 | 0.1 | 90% |
| , | 11 | 0.07943282 | 92.05671765% |
| - | 12 | 0.06309573 | 93.69042656% |
| . | 13 | 0.05011872 | 94.98812766% |
| / | 14 | 0.03981072 | 96.01892829% |
| 0 | 15 | 0.03162278 | 96.83772234% |
| 1 | 16 | 0.02511886 | 97.48811357% |
| 2 | 17 | 0.01995262 | 98.00473769% |
| 3 | 18 | 0.01584893 | 98.41510681% |
| 4 | 19 | 0.01258925 | 98.74107459% |
| 5 | 20 | 0.01 | 99% |
| 6 | 21 | 0.00794328 | 99.20567177% |
| 7 | 22 | 0.00630957 | 99.36904266% |
| 8 | 23 | 0.00501187 | 99.49881277% |
| 9 | 24 | 0.00398107 | 99.60189283% |
| : | 25 | 0.00316228 | 99.68377223% |
| ; | 26 | 0.00251189 | 99.74881136% |
| < | 27 | 0.00199526 | 99.80047377% |
| = | 28 | 0.00158489 | 99.84151068% |
| > | 29 | 0.00125893 | 99.87410746% |
| ? | 30 | 0.001 | 99.9% |
| @ | 31 | 0.00079433 | 99.92056718% |
| A | 32 | 0.00063096 | 99.93690427% |
| B | 33 | 0.00050119 | 99.94988128% |
| C | 34 | 0.00039811 | 99.96018928% |
| D | 35 | 0.00031623 | 99.96837722% |
| E | 36 | 0.00025119 | 99.97488114% |
| F | 37 | 0.00019953 | 99.98004738% |
| G | 38 | 0.00015849 | 99.98415107% |
| H | 39 | 0.00012589 | 99.98741075% |
| I | 40 | 0.0001 | 99.99% |