Efficiency Gap Calculator
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

View only
 
ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
DistrictRepublican VotesDemocratic VotesVotes needed to win districtRepublican wasted votesDemocrat wasted votesNet wasted votes
2
Simply the number of Republican votesSimply the number of Democratic votesThe votes needed to win (VNW) a district is half of all votes for Democrats and Republicans combined.Wasted votes (RWV or DWV) are those that don't lead to a candidate being elected. They are cast either (1) for a losing candidate or (2) for a winning candidate in excess of the votes needed to win.The net of Republican Wasted Votes and Democrat Wasted Votes
3
ExampleRDVNW=(R+D)/2
RWV=
if [D>R] then R
if [R>D] then R-VNW
DWV=
if [R>D] then D
if [D>R] then D-VNW
NWV=RWV-DWV
4
145005500500045005004000
5
245005500500045005004000
6
345005500500045005004000
7
445005500500045005004000
8
545005500500045005004000
9
645005500500045005004000
10
770003000500020003000-1000
11
870003000500020003000-1000
12
State Total4100039000900022000
13
The efficiency gap is net-wasted votes as a share of a state’s total vote. Since in this spreadsheet NWV = RWV - DWV a positive NWV indicates that more Republican votes have been wasted, while a negative NWV would indicate that more Democratic votes have been wasted. The math works the same if reversed, though bear in mind the directionality. In this example, in which the Democratic Party has won 6 of 8 seats while earning less than half of the total votes, district lines highly privelege Democrats at the expense of Republicans. 27.50%
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...