Dice Binning Calculator

To increase the transparency of the 1% manual tally process, a few California counties use 10-sided dice to produce publicly-verifiable random numbers (See Cordero, Wagner and Dill 2006).

Using 10-sided dice to select from only a few precincts can require a lot of re-rolling. To increase efficiency, Cordero et al. suggest "binning" the dice rolls so each precinct has a range of corresponding values, of equal width, allowing a higher percentage of dice rolls to "hit". This calculator implements that idea natively in your browser.