This calculator implements Blavatskyy's (2011) model of probabilistic choice. The example R code implements the model for a toy three-way choice. Pressing "run" submits the code to R and generates predictions, or you can edit the code for your own choices. Predictions appear at the bottom of the output page, and give the probability of selecting each gamble in each choice.
Full source code for the model is available, with a worked example applying the model to the choices from Kahneman and Tversky (1979).