Fractions To Decimals To Metric Chart

This is a rather straightforward chart. All fractions from 1/64 to 63/64 have been converted to their decimal values. If we think of these values as fractions of an inch, then we can convert these to their values in mililmeters. Even if you don't need the metric values, the chart will be handy to anyone who has ever used a wrench or socket set.

  Fraction  

  Decimal  

      mm      

1 / 64

0.015625

0.396875

1 / 32

0.031250

0.793750

3 / 64

0.046875

1.190625

1 / 16

0.062500

1.587500

5 / 64

0.078125

1.984375

3 / 32

0.093750

2.381250

7 / 64

0.109375

2.778125

1 / 8

0.125000

3.175000

9 / 64

0.140625

3.571875

5 / 32

0.156250

3.968750

11 / 64

0.171875

4.365625

3 / 16

0.187500

4.762500

13 / 64

0.203125

5.159375

7 / 32

0.218750

5.556250

15 / 64

0.234375

5.953125

1 / 4

0.250000

6.350000

17 / 64

0.265625

6.746875

9 / 32

0.281250

7.143750

19 / 64

0.296875

7.540625

5 / 16

0.312500

7.937500

21 / 64

0.328125

8.334375

11 / 32

0.343750

8.731250

23 / 64

0.359375

9.128125

3 / 8

0.375000

9.525000

25 / 64

0.390625

9.921875

13 / 32

0.406250

10.318750

27 / 64

0.421875

10.715625

7 / 16

0.437500

11.112500

29 / 64

0.453125

11.509375

15 / 32

0.468750

11.906250

31 / 64

0.484375

12.303125

1 / 2

0.500000

12.700000

33 / 64

0.515625

13.096875

17 / 32

0.531250

13.493750

35 / 64

0.546875

13.890625

9 / 16

0.562500

14.287500

37 / 64

0.578125

14.684375

19 / 32

0.593750

15.081250

39 / 64

0.609375

15.478125

5 / 8

0.625000

15.875000

41 / 64

0.640625

16.271875

21 / 32

0.656250

16.668750

43 / 64

0.671875

17.065625

11 / 16

0.687500

17.462500

45 / 64

0.703125

17.859375

23 / 32

0.718750

18.256250

47 / 64

0.734375

18.653125

3 / 4

0.750000

19.050000

49 / 64

0.765625

19.446875

25 / 32

0.781250

19.843750

51 / 64

0.796875

20.240625

13 / 16

0.812500

20.637500

53 / 64

0.828125

21.034375

27 / 32

0.843750

21.431250

55 / 64

0.859375

21.828125

7 / 8

0.875000

22.225000

57 / 64

0.890625

22.621875

29 / 32

0.906250

23.018750

59 / 64

0.921875

23.415625

15 / 16

0.937500

23.812500

61 / 64

0.953125

24.209375

31 / 32

0.968750

24.606250

63 / 64

0.984375

25.003125

1.000000

1.000000

25.400000

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