View source for 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.
{| class="wikitable"
|+
!#
!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%
|}