TECHNICAL: MATHEMATICAL CONVERSIONS

Circumferences and Areas of Circles

Diam-
eter

Circum-
ference

Area

Diam-
eter

Circum-
ference

Area

Diam-
eter

Circum-
ference

Area

1/64

0.0491

0.0002

2

6.2832

3.1416

5

15.7080

19.635

1/32

0.0982

0.0008

2 1/16

6.4795

3.3410

5 1/16

15.9043

20.129

1/16

0.1963

0.0031

2 1/8

6.6759

3.5466

5 1/8

16.1007

20.629

8/32

0.2945

0.0069

2 3/16

6.8722

3.7583

5 3/16

16.2970

21.135

1/8

0.3927

0.0123

2 1/4

7.0686

3.9761

5 1/4

16.4934

21.648

5/32

0.4909

0.0192

2 5/16

7.2649

4.2000

5 5/16

16.6987

22.166

3/16

0.5890

0.0276

2 3/8

7.4613

4.4301

5 3/8

16.8861

22.691

7/32

0.6872

0.0376

2 7/16

7.6576

4.6664

5 7/16

17.0824

23.221

1/4

0.7854

0.0491

2 1/2

7.8540

4.9087

5 1/2

17.2788

23.758

9/32

0.8836

0.0621

2 9/16

8.0503

5.1572

5 9/16

17.4751

24.301

5/16

0.9817

0.0767

2 5/8

8.2467

5.4119

5 5/8

17.6715

24.850

11/32

1.0799

0.0928

2 11/16

8.4430

5.6727

5 11/16

17.8678

25.406

3/8

1.1781

0.1104

2 3/4

8.6394

5.9396

5 3/4

18.0642

25.967

13/32

1.2763

0.1296

2 13/16

8.8357

6.2126

5 13/16

18.2605

26.535

7/16

1.3744

0.1503

2 7/8

9.0321

6.4918

5 7/8

18.4569

27.109

15/32

1.4726

0.1726

2 15/16

9.2284

6.7771

5 15/16

18.6532

27.688

1/2

1.5708

0.1963

3

9.4248

7.0686

6

18.8496

28.274

17/32

1.6690

0.2217

3 1/16

9.6211

7.3662

6 1/8

19.2423

29.465

9/16

1.7671

0.2485

3 1/8

9.8175

7.6699

6 1/4

19.6350

30.680

19/32

1.8653

0.2769

3 3/16

10.0138

7.9798

6 3/8

20.0277

31.919

5/8

1.9635

0.3068

3 1/4

10.2102

8.2958

6 1/2

20.4204

33.183

21/32

2.0617

0.3382

3 5/16

10.4065

8.6179

6 5/8

20.8131

34.472

11/16

2.1598

0.3712

3 3/8

10.6029

8.9462

6 3/4

21.2058

35.785

23/32

2.2580

0.4057

3 7/16

10.7992

9.2806

6 7/8

21.5984

37.122

3/4

2.3562

0.4418

3 1/2

10.9956

9.6211

7

21.9911

38.485

25/32

2.4544

0.4794

3 9/16

11.1919

9.9678

7 1/8

22.3838

39.871

13/16

2.5525

0.5185

3 6/8

11.3883

10.321

7 1/4

22.7765

41.282

27/32

2.6507

0.5591

3 11/16

11.5846

10.680

7 3/8

23.1692

42.718

7/8

2.7489

0.6013

3 3/4

11.7810

11.045

7 1/2

23.5619

44.179

29/32

2.8471

0.6450

3 13/16

11.9773

11.416

7 5/8

23.9546

45.664

15/16

2.9452

0.6903

3 7/8

12.1737

11.793

7 3/4

24.3473

47.173

31/32

3.0434

0.7371

3 15/16

12.3700

12.177

7 7/8

24.7400

48.707

1

3.1416

0.7854

4

12.5664

12.566

8

25.1327

50.265

1 1/16

3.3379

0.8866

4 1/16

12.7627

12.962

8 1/8

25.5254

51.849

1 1/8

3.5343

0.9940

4 1/8

12.9591

13.364

8 1/4

25.9181

53.456

1 3/16

3.7306

1.1075

4 3/16

13.1554

13.772

8 3/8

26.3108

55.088

1 1/4

3.9270

1.2272

4 1/4

13.3518

14.186

8 1/2

26.7035

56.745

1 5/16

4.1233

1.3530

4 5/16

13.5481

14.607

8 5/8

27.0962

58.426

1 3/8

4.3197

1.4849

4 3/8

13.7445

15.033

8 3/4

27.4889

60.132

1 7/16

4.5160

1.6230

4 7/16

13.9408

15.466

8 7/8

27.8816

61.862

1 1/2

4.7124

1.7671

4 1/2

14.1372

15.904

9

28.2743

63.617

1 9/16

4.9087

1.9175

4 9/16

14.3335

16.349

9 1/8

28.6670

65.397

1 5/8

5.1051

2.0739

4 5/8

14.5299

16.800

9 1/4

29.0597

67.201

1 11/16

5.3014

2.2365

4 11/16

14.7262

17.257

9 3/8

29.4524

69.029

1 3/4

5.4978

2.4053

4 3/4

14.9226

17.721

9 1/2

29.8451

70.882

1 13/16

5.6941

2.5802

4 13/16

15.1189

18.190

9 5/8

30.2378

72.760

1 7/8

5.8905

2.7612

4 7/8

15.3153

18.665

9 3/4

30.6305

74.662

1 15/16

6.0868

2.9483

4 15/16

15.5116

19.147

9 7/8

31.0232

76.589