Die Probabilities

This probability chart shows percentage of success when rolling these combinations. It does not report how many advantage, threat, triumph or depair might be rolled.

Pool
33.3%
50.0% 34.5% 26.0% 23.5% 17.5%
56.0%
66.6% 46.0% 35.0% 31.0% 23.6%
75.0% 57.0% 49.0% 43.5% 36.0%
83.0% 65.0% 56.0% 50.0%
87.5% 73.0% 66.0% 60.0%
89.0% 72.0% 64.0% 57.0%
92.0% 78.0% 72.0% 65.0%
94.0% 83.0% 78.0% 72.0%
94.5% 83.0% 77.0% 70.0%
96.0% 86.0% 81.0%
96.0% 87.0% 82.0%
97.0% 90.0% 86.5% 81.0% 77.0%
97.0% 89.0% 86.0%
98.0% 92.0% 89.0%
98.0% 92.0% 89.0%
99.0% 94.0% 91.0% 86.0% 82.0%

Advantage, Threat, Triumph & Despair Probabilities

For each pool it shows the average number of results you may get. The first number is when the overall result is a success and the second number is when the overall result is a failure.

For example, when rolling a single boost die you have an average chance of getting 0.5 advantage results when the overall result is a success and 0.7 advantage results when the overall result is a failure. This shows that a boost die gives more advantage when failing and less advantage when succeeding.

Pool Success %
33% 0.5 / 0.7 0.0 / 0.0 0.0 / 0.0 0.0 / 0.0
50% 0.3 / 1.0 0.0 / 0.0 0.0 / 0.0 0.0 / 0.0
67% 0.4 / 1.3 0.0 / 0.0 0.1 / 0.0 0.0 / 0.0
34% 0.0 / 0.4 0.8 / 0.2 0.0 / 0.0 0.0 / 0.0
44% 0.1 / 0.6 1.1 / 0.3 0.0 / 0.0 0.0 / 0.0
50% 0.2 / 0.7 1.0 / 0.3 0.1 / 0.1 0.0 / 0.0

Notes on Probability Trends

  • Larger Equal Pools = More Success
    • Equal pools trend towards favoring success when the pools are larger.
    • Example: = 34.0% while = 50.5%

From http://maxmahem.net/wp/star-wars-edge-of-the-empire-die-probabilities/ here is a chart on upgrading pools:

ModificationIncreased Average SuccessIncreased Average Advantage
Add +0.33+0.66
Add -0.33-0.33
Add +0.625+0.625
Add -0.625-0.75
Add +0.83+0.6
Add -0.75-0.6
Upgrade to +0.2083+0.0416
Upgrade to +0.25+0.083

Also from the same website comes the following summaries and formulas:

Upgrading to :

  • Has only minimal increases to the success rate (20.83% per die).
  • It has an insignificant increase to receiving more (20.83% maximum).
  • Adds the ability of rolling (42% chance maximum).

Upgrading to :

  • Has a better chance for increased failure than the 'good' die (25% per die).
  • Actually decreases odds of rolling threat! (41.66% maximum).
  • Same as Triumphs above.

Average Success Rate Formula (0.33B + 0.625A + 0.83P) - (0.33S + 0.50D + 0.75C)

Average Advantage Rate Formula (0.66B + 0.625A + 0.66P) - (0.33S + 0.75D + 0.66C)