Decimal and Metric Equivalents of Common Fractions of an Inch

Fraction (in)

Decimal (in)

Millimeters(mm)

1/64

0.0156

0.397

1/32

0.0312

0.794

3/64

0.0469

1.191

1/16

0.0625

1.588

5/64

0.0781

1.984

3/32

0.0938

2.381

7/64

0.1094

2.778

1/8

0.1250

3.175

9/64

0.1406

3.572

5/32

0.1562

3.969

11/64

0.1719

4.366

3/16

0.1875

4.762

13/64

0.2031

5.159

7/32

0.2188

5.556

15/64

0.2344

5.953

1/4

0.2500

6.350

17/64

0.2656

6.747

9/32

0.2812

7.144

19/64

0.2969

7.541

5/16

0.3125

7.938

21/64

0.3281

8.334

11/32

0.3438

8.731

23/64

0.3594

9.128

3/8

0.3750

9.525

25/64

0.3906

9.922

13/32

0.4062

10.319

27/64

0.4219

10.716

7/16

0.4375

11.112

29/64

0.4531

11.509

15/32

0.4688

11.906

31/64

0.4844

12.303

1/2

0.5000

12.700

33/64

0.5156

13.097

17/32

0.5312

13.494

35/64

0.5469

13.891

9/16

0.5625

14.288

37/64

0.5781

14.684

19/32

0.5938

15.081

39/64

0.6094

15.478

5/8

0.6250

15.875

41/64

0.6406

16.272

21/32

0.6562

16.669

43/64

0.6719

17.066

11/16

0.6875

17.462

45/64

0.7031

17.859

23/32

0.7188

18.256

47/64

0.7344

18.653

3/4

0.7500

19.050

49/64

0.7656

19.447

25/32

0.7812

19.844

51/64

0.7969

20.241

13/16

0.8125

20.638

53/64

0.8281

21.034

27/32

0.8438

21.431

55/64

0.8594

21.828

7/8

0.8750

22.225

57/64

0.8906

22.622

29/32

0.9062

23.019

59/64

0.9219

23.416

15/16

0.9375

23.812

61/64

0.9531

24.209

31/32

0.9688

24.606

63/64

0.9844

25.003

1

1.0000

25.400