1/4
20|28|32
0.25
0.2127
0.75
5/16
18|24|32
0.3125
0.2712
0.875
3/8
16|24|32
0.375
0.3287
1
7/16
14|20|28
0.4375
0.385
1.125
1/2
13|20|28
0.5
0.4435
1.25
9/16
12|18|24
0.5625
0.5016
1.375
5/8
11|18|24
0.625
0.5589
1.5
3/4
10|16|20
0.75
0.6773
1.75
7/8
9|14|20
0.875
0.7946
2
1
8|12|20
1
0.91
2.25
1-1/8
7|12|18
1.125
1.0228
2.5
1-1/4
7|12|18
1.25
1.1476
2.75
1-3/8
6|12|18
1.375
1.2563
3
1-1/2
6|12|18
1.5
1.3812
3.25