Probability Table
Because GURPS uses 3d6, understanding the probability of rolling under a target can be non-intuitive, especially when coming from other RPG systems.
To that end, here is a table showing you the likelihood of rolling at or below a target.
| # | Success |
|---|---|
| 3 | 0.46% |
| 4 | 1.85% |
| 5 | 4.62% |
| 6 | 9.25% |
| 7 | 16.2% |
| 8 | 25.92% |
| 9 | 37.5% |
| 10 | 50% |
| 11 | 62.5% |
| 12 | 74.07% |
| 13 | 83.79% |
| 14 | 90.74% |
| 15 | 95.37% |
| 16 | 98.14% |
| 17 | 99.53% |
| 18 | 100% |