Troll dice roller and probability calculator

News and discussion forum Last posting: Sun Nov 9 17:49:32 2025.



  Number of rolls:
  Digits of precision (0-12):     Column 2 shows:   ≥   ≤   >   <
  Muliplier (100 for percent):     Iteration bound (0-99):

You can add a description of your roll here to save it in the list of user-contributed rolls:

The description must start with a backslash and a space and will be added as a comment to the saved roll.
See the News thread for an explanation of the format requirement.
If the description already exists, the entry will be overwritten.

Please don't misuse this option. I will from time to time edit the list for junk and trivialities.

See the quick reference guide for details of how to use Troll.

Probability distribution:

Value% =% ≥Probability graph
3    0.463 100.000
4    1.389  99.537
5    2.778  98.148
6    4.630  95.370
7    6.944  90.741
8    9.722  83.796
9   11.574  74.074
10   12.500  62.500
11   12.500  50.000
12   11.574  37.500
13    9.722  25.926
14    6.944  16.204
15    4.630   9.259
16    2.778   4.630
17    1.389   1.852
18    0.463   0.463

Average value =   10.5
Spread =    2.95803989155
Mean deviation =    2.41666666667

Comments and suggestions can be sent to torbenm@di.ku.dk.

Check also the Troll Homepage