Size Conversion Chart

Remember rod tip's are measured in 64th's of an inch, guides are measured in millimeters across the guide opening. Reel seats are measured in millimeters of I.D. of the reel seat.
 
 

64ths Inch
Tackle Size

Metric

Fraction

Decimal

1
.

1/64
.01563

2
.

1/32
.03125
. 1.0 mm . .3937

3
.

3/64
.04688

4
.

1/16
.0625

5
.

5/64
.07813
. 2.0 mm . .07874

6
.

3/32
.09375

7
.

7/64
.10938
. 3.0 mm . .11811

8
.

1/8
.125

9
.

9/64
.14063

10
.

5/32
.15625
. 4.0 mm . .15748

11
.

11/64
.17188

12
.

3/16
.1875
. 5.0 mm . .19685

13
.

13/64
.20313

14
.

7/32
.21875

15
.

15/64
.23438
. 6.0 mm . .23622

16
.

1/4
.25
. 6.5 mm . .25591

17
.

17/64
.26563
. 7.0 mm . .27559

18
.

18 /64
.28125
. 7.5 mm . .29528

19
.

19/64
.29688

20
.

20 /64
.3125
. 8.0 mm . .31496

21
.

21/64
.32813
. 8.5 mm . .33465

22
.

11/32
.34375
. 9.0 mm . .35433

23
.

23/64
.35938
. 9.5 mm . .37402

24
.

3/8
.375

25
.

25/64
.39063
. 10.0 mm . .3937

26
.

13/32
.40625
. 10.5 mm . .41339

27
.

27/64
.42188
. 11.0 mm . .43307

28
.

7/16
.4375
. 11.5 mm . .45276

29
.

29/64
.45313

30
.

15/32
.46875
. 12.0 mm . .47244

31
.

31/64
.48438
. 12.5 mm . .49213

32
.

1/2
.5
. 13.0mm . .51181

33
.

33/64
.51563

34
.

17/32
.53125
. 13.5 mm . .5315

35
.

35/64
.54688
. 14.0 mm . .55118

36
.

36/64
.5625
. 14.5 mm . .57087

37
.

37/64
.57813
. 15.0 mm . .59055

38
.

19/32
.59375

39
.

39/64
.60938

40
.

5/8
.625
. 16.0 mm . .62992

41
.

41/64
.64063

42
.

21/32
.65625
. 17.0 mm . .66929

43
.

43/64
.67188

44
.

11/16
.6875

45
.

45/64
.70313
. 18.0 mm . .70866

46
.

23/32
.71875

47
.

47/64
.73438
. 19.0 mm . .74803

48
.

3/4
.75

49
.

49/64
.76563

50
.

25/32
.78125
. 20.0 mm . .7874

51
.

51/64
.79688

52
.

13/16
.8125
. 21.0 mm . .82677

53
.

53/64
.82813

54
.

27/32
.84375

55
.

55/64
.85938
. 22.0 mm . .86614

56
.

7/8
.875

57
.

57/64
.89063
. 23.0 mm . .90551

58
.

29/32
.90625

59
.

59/64
.92188

60
.

15/16
.9375
. 24.0 mm . .94488

61
.

61/64
.95313

62
.

31/32
.96875
. 25.0 mm . .98425

63
.

63/64
.98438

64
25.4 mm

1
1.00
. 29.0 mm . 1.14173
. 30.0 mm . 1.1811
. 36.0 mm . 1.41732
. 40.0 mm . 1.5748
. 43.0 mm . 1.69291
. 48.0 mm . 1.88976
. 49.0 mm . 1.92913
. 50.0 mm . 1.9685
. 60.0 mm . 2.3622
. 68.0 mm . 2.67716
. 75.0 mm . 2.95275

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