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Decimal Chart                               Back to Conversion list

Drill Size mm Decimal Drill Size mm Decimal Drill Size mm Decimal Drill Size mm Decimal
0.10 .0039 45 2.08 .0820 5 5.22 .2055 7/16 11.11 .4375
0.20 .00179 44 2.18 .0860 4 5.31 .2090 29/64 11.15 .4531
0.25 .0098 43 2.26 .0890 3 5.41 .2130 15/32 11.91 .4688
0.30 .0118 42 2.37 .0935 7/32 5.56 .2188 12.00 .4724
80 0.34 .0135 3/32 2.38 .0938 2 5.61 .2210 31/64 12.30 .4844
79 0.37 .0145 41 2.44 .0960 1 5.79 .2280 1/2 12.70 .5000
1/64 0.40 .0156 40 2.5 .0980 A 5.94 .2340 13.00 .5118
78 0.41 .0160 39 2.53 .0995 15/64 5.95 .2344 33/64 13.10 .5156
77 0.46 .0180 38 2.58 .1015 6.00 .2360 17/32 13.49 .5312
0.50 .0197 37 2.64 .1040 B 6.05 .2380 35/64 13.89 .5469
76 0.51 .0200 36 2.71 .1065 C 6.15 .2420 14.00 .5512
75 0.53 .0210 7/64 2.78 .1094 D 6.25 .2460 9/16 14.29 .5625
74 0.57 .0225 35 2.79 .1100 1/4 6.35 .2500 37/64 14.68 .5781
0.60 .0236 34 2.82 .1110 E 6.35 .2500 15.00 .5906
73 0.61 .0240 33 2.87 .1130 F 6.53 .2570 19/32 15.08 .5938
72 0.64 .0250 32 2.95 .1160 G 6.63 .2610 39/64 15.48 .6094
71 0.66 .0260 3.00 .1181 17/64 6.75 .2656 5/8 15.88 .6250
0.70 .0276 31 3.05 .1200 H 6.76 .2660 16.00 .6299
70 0.71 .0280 1/8 3.18 .1250 I 6.91 .2720 41/64 16.27 .6406
69 0.74 .0282 30 3.26 .1285 7.00 .2756 21/32 16.67 .6562
0.75 .0295 29 3.45 .1360 J 7.04 .2770 17.00 .6693
68 0.79 .0310 28 3.57 .1405 K 7.14 .2810 43/64 17.07 .6719
1/32 0.79 .0313 9/64 3.57 .1406 9/32 7.14 .2812 11/16 17.46 .6875
0.80 .0315 27 3.66 .1440 L 7.37 .2900 45/64 17.86 .7031
67 0.81 .0320 26 3.73 .1470 M 7.49 .2950 18.00 .7087
66 0.84 .0330 25 3.80 .1495 19/64 7.54 .2969 23/32 18.26 .7188
65 0.89 .0350 24 3.86 .1520 N 7.67 .3020 47/64 18.65 .7344
0.90 .0354 23 3.91 .1540 5/16 7.94 .3125 19.00 .7480
64 0.91 .0360 5/32 3.97 .1562 8.00 .3150 3/4 19.05 .7500
63 0.94 .0370 22 3.99 .1570 O 8.03 .3160 49/64 19.45 .7656
62 0.97 .0380 4.00 .1575 P 8.20 .3230 25/32 19.84 .7812
61 .099 .0390 21 4.04 .1590 21/64 8.33 .3281 20.00 .7874
1.00 .0394 20 4.09 .1610 Q 8.43 .3320 51/64 20.24 .7969
60 10.2 .0400 19 4.22 .1660 R 8.61 .3390 13/16 2.064 .8125
59 10.4 .0410 18 4.31 .1695 11/32 8.73 .3438 21.00 .8268
58 1.07 .0420 11/64 4.37 .1719 S 8.84 .3480 53/64 21.03 .8281
57 10.9 .0430 17 4.39 .1730 9.00 .3543 27/32 21.43 .8438
56 1.18 .0465 16 4.50 .1770 T 9.09 .3580 55/64 21.84 .8594
3/64 1.19 .0469 15 4.57 .1800 23/64 9.13 .3594 22.00 .8661
55 1.32 .0520 14 4.62 .1820 U 9.35 .3680 7/8 22.23 .8750
54 1.40 .0550 13 4.70 .1850 3/8 9.53 .3750 57/64 22.62 .8906
53 1.51 .0595 3/16 4.76 .1875 V 9.56 .3770 23.00 .9055
1/16 1.59 .0625 12 4.80 .1890 W 9.80 .3860 29/32 23.02 .9062
52 1.61 .0635 11 4.85 .1910 25/64 9.92 .3906 59/64 23.42 .9219
51 1.70 .0670 10 4.91 .1935 10.00 .3937 15/16 23.81 .9375
50 1.78 .0700 9 4.98 .1960 X 10.08 .3970 24.00 .9449
49 1.85 .0730 5.00 .1968 Y 10.26 .4040 61/64 24.21 .9531
48 1.93 .0760 8 5.05 .1990 13/32 10.32 .4062 31/32 24.61 .9688
5/64 1.98 .0781 7 5.11 .2010 Z 10.49 .4130 25.00 .9843
47 1.99 .0785 13/64 5.16 .2031 27/64 10.72 .4219 63/64 25.00 .9844
2.00 .0787 6 5.18 .2040 11.00 .4331 1" 25.40 1.0000
46 2.06 .0810