1/4       0.2500

1/2

0.500

0.488

0.577

0.556

11/64

0.188

0.156

5/16      0.3125

9/16

0.562

0.546

0.650

0.622

13/64

0.220

0.186

3/8       0.3750

11/16

0.688

0.669

0.794

0.763

15/64

0.252

0.216

7/16      0.4375

3/4

0.750

0.728

0.866

0.830

17/64

0.285

0.247

1/2       0.5000

7/8

0.875

0.850

1.010

0.969

19/64

0.317

0.277

9/16      0.5625

15/16

0.938

0.909

1.083

1.037

21/64

0.349

0.307

5/8       0.6250

1 1/16

1.062

1.031

1.227

1.175

23/64

0.381

0.337

3/4       0.7500

1 1/4

1.250

1.212

1.443

1.382

27/64

0.446

0.398

7/8       0.8750

1 7/16

1.438

1.394

1.660

1.589

31/64

0.510

0.458

1          1.0000

1 5/8

1.625

1.575

1.876

1.796

35/64

0.575

0.519

1 1/8     1.1250

1 13/16

1.812

1.756

2.093

2.002

39/64

0.639

0.579

1 1/4     1.2500

2

2.000

1.938

2.309

2.209

23/32

0.751

0.687

1 3/8     1.3750

2 3/16

2.188

2.119

2.526

2.416

25/32

0.815

0.747

1 1/2     1.5000

2 3/8

2.375

2.300

2.742

2.622

27/32

0.880

0.808

1 5/8     1.6250

2 9/16

2.562

2.481

2.959

2.828

29/32

0.944

0.868

1 3/4     1.7500

2 3/4

2.750

2.662

3.175

3.035

31/32

1.009

0.929

1 7/8     1.8750

2 15/16

2.938

2.844

3.392

3.242

1 1/16

1.073

0.989

2          2.0000

3 1/8

3.125

3.025

3.608

3.449

1 3/32

1.138

1.050