1/4     0.2500

1/2

0.500

0.488

0.577

0.556

15/64

0.250

0.218

5/16    0.3125

9/16

0.562

0.546

0.650

0.622

19/64

0.314

0.280

3/8     0.3750

11/16

0.688

0.669

0.794

0.763

23/64

0.377

0.341

7/16    0.4375

3/4

0.750

0.728

0.866

0.830

27/64

0.441

0.403

1/2     0.5000

7/8

0.875

0.850

1.010

0.969

31/64

0.504

0.464

9/16    0.5625

15/16

0.938

0.909

1.083

1.037

35/64

0.568

0.526

5/8     0.6250

1 1/16

1.062

1.031

1.227

1.175

39/64

0.631

0.587

3/4     0.7500

1 1/4

1.250

1.212

1.443

1.382

47/64

0.758

0.710

7/8     0.8750

1 7/16

1.438

1.394

1.660

1.589

55/64

0.885

0.833

1        1.0000

1 5/8

1.625

1.575

1.876

1.796

63/64

1.012

0.956

1 1/8  1.1250

1 13/16

1.812

1.756

2.093

2.002

1 7/64

1.139

1.079

1 1/4  1.2500

2

2.000

1.938

2.309

2.209

1 7/32

1.251

1.187

1 3/8  1.3750

2 3/16

2.188

2.119

2.526

2.416

1 11/32

1.378

1.310

1 1/2  1.5000

2 3/8

2.375

2.300

2.742

2.622

1 15/32

1.505

1.433

1 5/8  1.6250

2 9/16

2.562

2.481

2.959

2.828

1 19/32

1.632

1.556

1 3/4  1.7500

2 3/4

2.750

2.662

3.175

3.035

1 23/32

1.759

1.679

1 7/8  1.8750

2 15/16

2.938

2.844

3.392

3.242

1 27/32

1.886

1.802

2        2.0000

3 1/8

3.125

3.025

3.608

3.449

1 31/32

2.013

1.925

2 1/4  2.2500

3 1/2

3.500

3.388

4.041

3.862

2 13/64

2.251

2.155

2 1/2  2.5000

3 7/8

3.875

3.750

4.474

4.275

2 29/64

2.505

2.401

2 3/4  2.7500

4 1/4

4.250

4.112

4.907

4.688

2 45/64

2.759

2.647

3        3.0000

4 5/8

4.625

4.475

5.340

5.102

2 61/64

3.013

2.893

3 1/4  3.2500

5

5.000

4.838

5.774

5.515

3 3/16

3.252

3.124

3 1/2  3.5000

5 3/8

5.375

5.200

6.207

5.928

3 7/16

3.506

3.370

3 3/4  3.7500

5 3/4

5.750

5.562

6.640

6.341

3 11/16

3.760

3.616

4        4.0000

6 1/8

6.125

5.925

7.073

6.755

3 15/16

4.014

3.862