1/4               0.2500

7/16

0.438

0.428

0.505

0.488

7/32

0.226

0.212

5/16             0.3125

1/2

0.500

0.489

0.577

0.557

17/64

0.273

0.258

3/8               0.3750

9/16

0.562

0.551

0.650

0.628

21/64

0.337

0.320

7/16             0.4375

11/16

0.688

0.675

0.794

0.768

3/8

0.385

0.365

1/2               0.5000

3/4

0.750

0.736

0.866

0.840

7/16

0.448

0.427

9/16             0.5625

7/8

0.875

0.861

1.010

0.982

31/64

0.496

0.473

5/8               0.6250

15/16

0.938

0.922

1.083

1.051

35/64

0.559

0.535

3/4               0.7500

1 1/8

1.125

1.088

1.299

1.240

41/64

0.665

0.617

7/8               0.8750

1 5/16

1.312

1.269

1.516

1.447

3/4

0.776

0.724

1                 1.0000

1 1/2

1.500

1.450

1.732

1.653

55/64

0.887

0.831

1 1/8            1.1250

1 11/16

1.688

1.631

1.949

1.859

31/32

0.999

0.939

1 1/4            1.2500

1 7/8

1.875

1.812

2.165

2.066

1 1/16

1.094

1.030

1 3/8            1.3750

2 1/16

2.062

1.994

2.382

2.273

1 11/64

1.206

1.138

1 1/2            1.5000

2 1/4

2.250

2.175

2.598

2.480

1 9/32

1.317

1.245