Below is an empty weighted voting system. Enter in the number of votes each participant may cast. If the quota is the simple majority of the total number of votes, click the "Simple Majority" button to have the quota calculated automatically from the total number of votes. Otherwise, enter the quota in the box on the top left. Press the button labeled "Power Index" to compute the Banzhaf power index of each participant in the system. Empty voter boxes and voters with zero weight are ignored; they do not affect the power indices.

Banzhaf Power Calculator