Decimal Equivalents of Fractional, Number, Letter & Metric Drills

Decimal Equivalents of Fractional, Number, Letter & Metric Drills

Decimal

Inch

Wire

mm

.0135

 

80

 

.0138

 

 

.35

.0145

 

79

 

.0156

1/64

 

 

.0158

 

 

.40

.0160

 

78

 

.0177

 

 

.45

.0180

 

77

 

.0197

 

 

.50

.0200

 

76

 

.0210

 

75

 

.0217

 

 

.55

.0225

 

74

 

.0236

 

 

.60

.0240

 

73

 

.0250

 

72

 

.0256

 

 

.65

.0260

 

71

 

.0276

 

 

.70

.0280

 

70

 

.0292

 

69

 

.0295

 

 

.75

.0310

 

68

 

.0312

1/32

 

 

.0315

 

 

.80

.0320

 

67

 

.0330

 

66

 

.0335

 

 

.85

.0350

 

65

 

.0354

 

 

.90

.0360

 

64

 

.0370

 

63

 

.0374

 

 

.95

.0380

 

62

 

.0390

 

61

 

.0394

 

 

1.00

.0400

 

60

 

.0410

 

59

 

.0420

 

58

 

.0430

 

57

 

.0465

 

56

 

.0469

3/64

 

 

.0492

 

 

1.25

.0520

 

55

 

.0550

 

54

1.25

.0591

 

 

1.50

.0595

 

53

 

.0625

1/16

 

 

.0635

 

52

 

.0670

 

51

 

.0689

 

 

1.75

.0700

 

50

 

.0730

 

49

 

.0760

 

48

 

.0781

5/64

 

 

.0785

 

47

 

.0787

 

 

2.00

.0810

 

46

 

.0820

 

45

 

0860

 

44

 

.0890

 

43

 

.0935

 

42

 

.0938

3/32

 

 

.0960

 

41

 

.0980

 

40

 

.0994

 

 

2.50

.0995

 

39

 

.1015

 

38

 

.1040

 

37

 

.1065

 

36

 

.1094

7/64

 

 

.1100

 

35

 

.1110

 

34

 

.1130

 

33

 

.1160

 

32

 

.1181

 

 

3.00

.1200

 

31

 

.1250

1/8

 

 

.1285

 

30

 

.1360

 

29

 

.1378

 

 

3.50

.1405

 

28

 

.1406

9/64

 

 

.1440

 

27

 

.1470

 

26

 

.1495

 

25

 

.1520

 

24

 

.1540

 

23

 

.1562

5/32

 

 

.1570

 

22

 

.1575

 

 

4.00

.1590

 

21

 

.1610

 

20

 

.1660

 

19

 

.1695

 

18

 

.1719

11/64

 

 

.1730

 

17

 

.1770

 

16

 

.1772

 

 

4.50

.1800

 

15

 

.1820

 

14

 

.1850

 

13

 

.1875

3/16

 

 

.1890

 

12

 

.1910

 

11

 

.1935

 

10

 

.1960

 

9

 

.1969

 

 

5.00

.1990

 

8

 

.2010

 

7

 

.2031

13/64

5

 

.2040

 

6

 

.2055

 

5

 

.2090

 

4

 

.2165

 

 

5.50

.2188

7/32

 

 

.221

 

2

 

.2280

 

1

 

.2340

 

A

 

.2344

15/64

 

 

.2362

 

 

6.00

.2380

 

B

 

.2420

 

C

 

.2460

 

D

 

.2500

1/4

E

 

.2559

 

 

6.50

.2570

 

F

 

.2610

 

G

 

.2656

17/64

 

 

.2660

 

H

 

.2677

 

 

6.8

.2720

 

1

 

.2756

 

 

7.00

.2770

 

J

 

.2810

 

K

 

.2812

9/32

 

 

.2900

 

L

 

.2950

 

M

 

.2953

 

 

7.50

.2969

19/64

 

 

.3020

 

N

 

.3125

5/16

 

 

.3150

 

 

8.00

.3160

 

0

 

.3230

 

P

 

.3281

21/64

 

 

.3320

 

Q

 

.3347

 

 

8.50

.3390

 

R

 

.3438

11/32

 

 

.3480

 

S

 

.3543

 

 

9.00

.3580

 

T

 

.3594

23/64

 

 

.3680

 

U

 

.3750

3/8

 

 

.3770

 

V

 

.3860

 

W

 

.3906

25/64

 

 

.3937

 

 

10.00

.3970

 

X

 

.4040

 

Y

 

.4062

13/32

 

 

.4130

 

Z

 

.4134

 

 

10.50

.4219

27/64

 

 

.4331

 

 

11.00

.4375

7/16

 

 

.4528

 

 

11.50

.4531

29/64

 

 

.4688

15/32

 

 

.4724

 

 

12.00

.4844

31/64

 

 

.4921

 

 

12.50

.5000

1/2

 

 

.5118

 

 

13.00

.5156

33/64

 

 

.5312

17/32

 

 

.5315

 

 

13.50

.5469

35/64

 

 

.5512

 

 

14.00

.5625

9/16

 

 

.5709

 

 

14.50

.5781

37/64

 

 

.5906

 

 

15.00

.5938

19/32

 

 

.6094

39/64

 

 

.6102

 

 

15.50

.6250

5/8

 

 

.6299

 

 

16.00

.6406

41/64

 

 

.6496

 

 

16.50

.6562

21/32

 

 

.6693

 

 

17.00

.6719

43/64

 

 

.6875

11/16

 

 

.6890

 

17.50

17.50

.7031

45/64

 

 

.7087

 

18.00

18.00

.7188

23/32

 

 

.7283

 

18.50

18.50

.7344

47/64

 

 

.7480

 

19.00

19.00

.7500

3/4

 

 

.7656

49/64

 

 

.7677

 

19.50

19.50

.7812

25/32

 

 

.7874

 

20.00

20.00

.7969

51/64

 

 

.8071

 

20.50

20.50

.8125

13/16

 

 

.8268

 

21.00

21.00

.8281

53/64

 

 

.8438

27/32

 

 

.8465

 

21.50

21.50

.8594

55/64

 

 

.8661

 

22.00

22.00

.8750

7/8

 

 

.8858

 

22.50

22.50

.8906

57/64

 

 

.9055

 

23.00

23.00

.9062

29/32

 

 

.9219

59/64

 

 

.9252

 

23.50

23.50

.9375

15/16

 

 

.9449

 

24.00

24.00

.9531

61/64

 

 

.9646

 

24.50

24.50

.9688

31/32

 

 

.9843

 

25.00

25.00

.9844

63/64

 

 

1.0000

1

 

 

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