DECIMAL EQUIVALENTS
FRACTION,NUMBER,LETTER,METRIC DRILL SIZES
DRILL
SIZE
DEC.
EQU.
IN.
DRILL
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IN.
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SIZE
DEC.
EQU.
IN.
107 .0019 106 .0023 105 .0027 104 .0031 103 .0035
102 .0039 101 .0043 100 .0047 99 .0051 98 .0055
97 .0059 96 .0063 95 .0067 94 .0071 93 .0075
92 .0079 .2mm .0079 91 .0083 90 .0087 .22mm .0087
89 .0091 88 .0095 .25mm .0098 87 .0100 86 .0105
85 .110 .28mm .0110 84 .0115 .3mm .0118 83 .0120
82 .0125 .32mm .0126 81 .0130 80 .0135 .35mm .0138
79 .0145 1/64 .0156 .4mm .0157 78 .0160 .45mm .0177
77 .0180 .5mm .0197 76 .0200 75 .0210 .55mm .0217
DRILL
SIZE
DEC.
EQU.
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DEC.
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DEC.
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IN.
DRILL
SIZE
DEC.
EQU.
IN.
74 .0225 .6mm .0236 73 .0240 72 .0250
.65mm .0256 71 .0260 .7mm .0276 70 .0280
69 .0292 .75mm .0295 68 .0310 1/32 .0312
.8mm .0315 67 .0320 66 .0330 .85mm .0335 65 .0350
.9mm .0354 64 .0360 63 .0370 .95mm .0374 62 .0380
61 .0390 1mm .0394 60 .0400 59 .0410 1.05mm .0413
58 .0420 57 .0430 1.1mm .0433 1.15mm .0453 56 .0465
3/64 .0469 1.2mm .0472 1.25mm .0492 1.3mm .0512 55 .0520
1.35mm .0531 54 .0550 1.4mm .0551 1.45mm .0571 1.5mm .0591
53 .0595 1.55mm .0610 1/16 .0625 1.6mm .0630 52 .0635
DRILL
SIZE
DEC.
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DRILL
SIZE
DEC.
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IN.
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SIZE
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SIZE
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DRILL
SIZE
DEC.
EQU.
IN.
1.65mm .0650 1.7mm .0669 51 .0670 1.75mm .0689 50 .0700
1.8mm .0709 1.85mm .0728 49 .073 1.9mm .0748 48 .0760
1.95mm .0768 5/64 .0781 47 .0785 2mm .0787 2.05mm .0807
46 .0810 45 .0820 2.1mm .0827 2.15mm .0846 44 .0860
2.2mm .0866 2.25mm .0886 43 .0890 2.3mm .0906 2.35mm .0925
42 .0935 3/32 .0938 2.4mm .0945 41 .0960 2.45mm .0965
40 .0980 2.5mm .0984 39 .0995 38 .1015 2.6mm .1024
37 .1040 2.7mm .1063 36 .1065 2.75mm .1083 7/64 .1094
35 .1100 2.8mm .1102 34 .1110 33 .113 2.9mm .1142
DRILL
SIZE
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SIZE
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EQU.
IN.
32 .1160 3mm .1181 31 .1200 3.1mm .1220 1/8 .1250
3.2mm .1260 3.25mm .1260 30 .1285 3.3mm .1299 3.4mm .1339
29 .1360 3.5mm .1378 28 .1405 9/64 .1406 3.6mm .1417
27 .1440 3.7mm .1457 26 .1470 3.75mm .1476 25 .1495
3.8mm .1496 24 .1520 3.9mm .1535 23 .1540 5/32 .1562
22 .1570 4mm .1575 21 .1590 20 .1610 4.1mm .1614
4.2mm .1654 19 .1660 4.25mm .1673 4.3mm .1693 18 .1695
11/64 .1719 17 .1730 4.4mm .1732 16 .1770 4.5mm .1772
15 .1800 4.6mm .1811 14 .1820 13 .1850 4.7mm .1850
DRILL
SIZE
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4.75mm .1870 3/16 .1875 4.8mm .1890 12 .1890 11 .1910
4.9mm .1929 10 .1935 9 .1960 5mm .1969 8 .1990
5.1mm .2008 7 .2010 13/64 .2031 6 .2040 5.2mm .2047
5 .2055 5.25mm .2067 5.3mm .2087 4 .2090 5.4mm .2126
3 .2130 5.5mm .2165 7/32 .2188 5.6mm .2205 2 .2211
5.7mm .2244 5.75mm .2264 1 .2280 5.8mm .2283 5.9mm .2323
A .2340 15/64 .2344 6mm .2362 B .2380 6.1mm .2402
C .2420 6.2mm .2441 D .2460 6.25mm .2461 6.3mm .2480
E .250 1/4 .250 6.4mm .2520 6.5mm .2559 F .2570
DRILL
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6.6mm .2598 G .2610 6.7mm .2638 17/64 .2656 6.75mm .2657
H .2660 6.8mm .2677 6.9mm .2717 I .2720 7mm .2756
J .2770 7.1mm .2795 K .2810 9/32 .2812 7.2mm .2835
7.25mm .2854 7.3mm .2874 L .2900 7.4mm .2913 M .2950
7.5mm .2953 19/64 .2969 7.6mm .2992 N .3020 7.7mm .3031
7.75mm .3051 7.8mm .3071 7.9mm .3110 5/16 .3125 8mm .3150
O .3160 8.1mm .3189 8.2mm .3228 P .3230 8.25mm .3248
8.3mm .3268 21/64 .3281 8.4mm .3307 Q .3320 8.5mm .3346
8.6 .3386 R .3390 8.7mm .3425 11/32 .3438 8.75mm .3445
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8.8mm .3465 S .3480 8.9mm .3504 9mm .3543 T .3580
9.1mm .3583 23/64 .3594 9.2mm .3622 9.25mm .3642 9.3mm .3661
U .3680 9.4mm .3701 9.5mm .3740 3/8 .3750 V .3770
9.6mm .3780 9.7mm .3819 9.75mm .3839 9.8mm .3858 W .3860
9.9mm .3898 25/64 .3906 10mm .3937 X .3970 Y .4040
13/32 .4062 Z .4130 10.5mm .4134 27/64 .4219 11mm .4331
7/16 .4375 11.5mm .4528 29/64 .4531 15/32 .4688 12mm .4724
31/64 .4844 12.5mm .4921 1/2 .5000 13mm .5118 33/64 .5156
17/32 .5312 13.5mm .5315 35/64 .5469 14mm .5512 9/16 .5625
DRILL
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14.5mm .5709 37/64 .5781 15mm .5906 19/32 .5938 39/64 .6094
15.5mm .6102 5/8 .6250 16mm .6299 41/64 .6406 16.5mm .6496
21/32 .6562 17mm .6693 43/64 .6719 11/16 .6875 17.5mm .6890
45/64 .7031 18mm .7087 23/32 .7188 18.5mm .7283 47/64 .7344
19mm .7480 3/4 .7500 49/64 .7656 19.5mm .7677 25/32 .7812
20mm .7874 51/64 .7969 20.5mm .8071 13/16 .8125 21mm .8268
53/64 .8281 27/32 .8438 21.5mm .8465 55/64 .8594 22mm .8661
7/8 .8750 22.5mm .8858 57/64 .8906 23mm .9055 29/32 .9062
59/64 .9219 23.5mm .9252 15/16 .9375 24mm .9449 61/64 .9531
24.5mm .9646 31/32 .9688 25mm .9843 63/64 .9844 1 1.000
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