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Standard Drill Size Tables

American Standard Wire Size Drills

Drill Diameter Drill Diameter Drill Diameter
Size (inches) Size (inches) Size (inches)
97 .0059 96 .0063 95 .0067
94 .0071 93 .0075 92 .0079
91 .0083 90 .0087 89 .0091
88 .0095 87 .0100 86 .0105
85 .0110 84 .0115 83 .0120
82 .0125 81 .0130 80 .0135
79 .0145 78 .0160 77 .0180
76 .0200 75 .0210 74 .0225
73 .0240 72 .0250 71 .0260
70 .0280 69 .0292 68 .0310
67 .0320 66 .0330 65 .0350
64 .0360 63 .0370 62 .0380
61 .0390 60 .0400 59 .0410
58 .0420 57 .0430 56 .0465
55 .0520 54 .0550 53 .0595
52 .0635 51 .0670 50 .0700
49 .0730 48 .0760 47 .0785
46 .0810 45 .0820 44 .0860
43 .0890 42 .0935 41 .0960
40 .0980 39 .0995 38 .1015
37 .1040 36 .1065 35 .1100
34 .1110 33 .1130 32 .1160
31 .1200 30 .1285 29 .1360
28 .1405 27 .1440 26 .1470
25 .1495 24 .1520 23 .1540
22 .1570 21 .1590 20 .1610
19 .1660 18 .1695 17 .1730
16 .1770 15 .1800 14 .1820
13 .1850 12 .1890 11 .1910
10 .1935 9 .1960 8 .1990
7 .2010 6 .2040 5 .2055
4 .2090 3 .2130 2 .2210
1 .2280

American Standard Letter Size Drills

Drill Diameter Drill Diameter Drill Diameter
Size (inches) Size (inches) Size (inches)
A .2340 B .2380 C .2420
D .2460 E .2500 F .2570
G .2610 H .2660 I .2720
J .2770 K .2810 L .2900
M .2950 N .3020 O .3160
P .3230 Q .3320 R .3390
S .3480 T .3580 U .3680
V .3770 W .3860 X .3970
Y .4040 Z .4130

Fractional Inch Size Drills

Drill Diameter Drill Diameter Drill Diameter
Size (inches) Size (inches) Size (inches)
1/64 .0156 1/32 .0313 3/64 .0469
1/16 .0625 5/64 .0781 3/32 .0938
7/64 .1094 1/8 .1250 9/64 .1406
5/32 .1562 11/64 .1719 3/16 .1875
13/64 .2031 7/32 .2188 15/64 .2344
1/4 .2500 17/64 .2656 9/32 .2812
19/64 .2969 5/16 .3125 21/64 .3281
11/32 .3438 23/64 .3594 3/8 .3750
25/64 .3906 13/32 .4062 27/64 .4219
7/16 .4375 29/64 .4531 15/32 .4688
31/64 .4844 1/2 .5000 33/64 .5156
17/32 .5313 35/64 .5469 9/16 .5625
37/64 .5781 19/32 .5938 39/64 .6094
5/8 .6250 41/64 .6406 21/32 .6562
43/64 .6719 11/16 .6875 45/64 .7031
23/32 .7188 47/64 .7344 3/4 .7500
49/64 .7656 25/32 .7812 51/64 .7969
13/16 .8125 53/64 .8281 27/32 .8438
55/64 .8594 7/8 .8750 57/64 .8906
29/32 .9062 59/64 .9219 15/16 .9375
61/64 .9531 31/32 .9688 63/64 .9844
1 1.0000

Metric Drills

Drill Diameter Drill Diameter Drill Diameter
Size (inches) Size (inches) Size (inches)
0.20 mm .00787 0.25 mm .00984 0.30 mm .0118
0.35 mm .0138 0.40 mm .0158 0.45 mm .0177
0.50 mm .0197 0.55 mm .0217 0.60 mm .0236
0.65 mm .0256 0.70 mm .0276 0.75 mm .0295
0.80 mm .0315 0.85 mm .0335 0.90 mm .0354
0.95 mm .0374 1.00 mm .0394 1.05 mm .0413
1.10 mm .0433 1.15 mm .0453 1.20 mm .0472
1.25 mm .0492 1.30 mm .0512 1.35 mm .0531
1.40 mm .0551 1.45 mm .0571 1.50 mm .0591
1.55 mm .0610 1.60 mm .0630 1.65 mm .0650
1.70 mm .0669 1.75 mm .0689 1.80 mm .0709
1.85 mm .0728 1.90 mm .0748 1.95 mm .0768
2.00 mm .0787 2.05 mm .0807 2.10 mm .0827
2.15 mm .0846 2.20 mm .0866 2.25 mm .0886
2.30 mm .0906 2.35 mm .0925 2.40 mm .0945
2.45 mm .0965 2.50 mm .0984 2.55 mm .1004
2.60 mm .1024 2.65 mm .1043 2.70 mm .1063
2.75 mm .1083 2.80 mm .1102 2.85 mm .1122
2.90 mm .1142 2.95 mm .1161 3.00 mm .1181
3.10 mm .1220 3.15 mm .1240 3.20 mm .1260
3.25 mm .1280 3.30 mm .1299 3.40 mm .1339
3.50 mm .1378 3.60 mm .1417 3.70 mm .1457
3.75 mm .1476 3.80 mm .1496 3.90 mm .1535
4.00 mm .1575 4.10 mm .1614 4.20 mm .1654
4.25 mm .1673 4.30 mm .1693 4.40 mm .1732
4.50 mm .1772 4.60 mm .1811 4.70 mm .1850
4.75 mm .1870 4.80 mm .1890 4.90 mm .1929
5.00 mm .1969 5.10 mm .2008 5.20 mm .2047
5.25 mm .2067 5.30 mm .2087 5.40 mm .2126
5.50 mm .2165 5.60 mm .2205 5.70 mm .2244
5.75 mm .2264 5.80 mm .2283 5.90 mm .2323
6.00 mm .2362 6.10 mm .2402 6.20 mm .2441
6.25 mm .2461 6.30 mm .2480 6.40 mm .2520
6.50 mm .2559 6.60 mm .2598 6.70 mm .2638
6.75 mm .2657 6.80 mm .2677 6.90 mm .2717
7.00 mm .2756 7.10 mm .2795 7.20 mm .2835
7.25 mm .2854 7.30 mm .2874 7.40 mm .2914
7.50 mm .2953 7.60 mm .2992 7.70 mm .3031
8.00 mm .3150 8.10 mm .3189 8.20 mm .3228
8.25 mm .3248 8.30 mm .3268 8.40 mm .3307
8.50 mm .3346 8.60 mm .3386 8.70 mm .3425
8.75 mm .3445 8.80 mm .3465 8.90 mm .3504
9.00 mm .3543 9.10 mm .3583 9.20 mm .3622
9.25 mm .3642 9.30 mm .3661 9.40 mm .3701
9.50 mm .3740 9.60 mm .3780 9.70 mm .3819
9.75 mm .3839 9.80 mm .3858 9.90 mm .3898
10.00 mm .3937 10.10 mm .3976 10.20 mm .4016
10.25 mm .4035 10.30 mm .4055 10.40 mm .4094
10.50 mm .4134 10.60 mm .4173 10.70 mm .4213
10.80 mm .4252 10.90 mm .4291 11.00 mm .4331
11.10 mm .4370 11.20 mm .4409 11.25 mm .4429
11.30 mm .4449 11.40 mm .4488 11.50 mm .4528
11.60 mm .4567 11.70 mm .4606 11.75 mm .4626
11.80 mm .4646 11.90 mm .4685 12.00 mm .4724
12.50 mm .4921 13.00 mm .5118 13.50 mm .5315
14.00 mm .5512 14.50 mm .5709 15.00 mm .5906
15.50 mm .6102 16.00 mm .6299 16.50 mm .6496
17.00 mm .6693 17.50 mm .6890 18.00 mm .7087
18.50 mm .7283 19.00 mm .7480 19.50 mm .7677
20.00 mm .7874 20.50 mm .8071 21.00 mm .8268
21.50 mm .8465 22.00 mm .8661 22.50 mm .8858
23.00 mm .9055 23.50 mm .9252 24.00 mm .9449
24.50 mm .9646 25.00 mm .9843