Trying to convert between Hero and a percentile based system. Here's the percentile chance of success for Hero 3D6 based skills.
| 3D6 Roll | Percentile |
| 3 or less | 0.46% |
| 4 or less | 1.85% |
| 5 or less | 4.63% |
| 6 or less | 9.26% |
| 7 or less | 16.20% |
| 8 or less | 25.93% |
| 9 or less | 37.50% |
| 10 or less | 50.00% |
| 11 or less | 62.50% |
| 12 or less | 74.07% |
| 13 or less | 83.80% |
| 14 or less | 90.74% |
| 15 or less | 95.37% |
| 16 or less | 98.15% |
| 17 or less | 99.54% |
| 18 or less | 100.00% |