Drill Size
US and Metric Size Commercial Drills
Fraction No. or Letter | mm | Equivalent Inch | Equivalent mm |
---|---|---|---|
80 | 0.0135 | 0.343 | |
0.35 | 0.0138 | 0.350 | |
79 | 0.0145 | 0.368 | |
0.38 | 0.0150 | 0.380 | |
1/64 | 0.0156 | 0.396 | |
0.40 | 0.0157 | 0.400 | |
78 | 0.0160 | 0.406 | |
0.42 | 0.0165 | 0.420 | |
0.45 | 0.0177 | 0.450 | |
77 | 0.0180 | 0.457 | |
0.48 | 0.0189 | 0.480 | |
0.50 | 0.0197 | 0.500 | |
76 | 0.0200 | 0.508 | |
75 | 0.0210 | 0.533 | |
0.55 | 0.0217 | 0.550 | |
74 | 0.0225 | 0.572 | |
0.60 | 0.0236 | 0.600 | |
73 | 0.0240 | 0.610 | |
72 | 0.0250 | 0.635 | |
0.65 | 0.0256 | 0.650 | |
71 | 0.0260 | 0.660 | |
0.70 | 0.0276 | 0.700 | |
70 | 0.0280 | 0.711 | |
69 | 0.0292 | 0.742 | |
0.75 | 0.0295 | 0.750 | |
68 | 0.0310 | 0.787 | |
1/32 | 0.0312 | 0.792 | |
0.80 | 0.0315 | 0.800 | |
67 | 0.0320 | 0.813 | |
66 | 0.0330 | 0.838 | |
0.85 | 0.0335 | 0.850 | |
65 | 0.0350 | 0.889 | |
0.90 | 0.0354 | 0.899 | |
64 | 0.0360 | 0.914 | |
63 | 0.0370 | 0.940 | |
0.95 | 0.0374 | 0.950 | |
62 | 0.0380 | 0.965 | |
61 | 0.0390 | 0.991 | |
1.00 | 0.0394 | 1.000 | |
60 | 0.0400 | 1.016 | |
59 | 0.0410 | 1.041 | |
1.05 | 0.0413 | 1.050 | |
58 | 0.0420 | 1.067 | |
Inch | m} | ||
57 | 0.0430 | 1.092 | |
1.10 | 0.0433 | 1.100 | |
1.15 | 0.0453 | 1.150 | |
56 | 0.0465 | 1.181 | |
3/64 | 0.0469 | 1.191 | |
1.20 | 0.0472 | 1.200 | |
1.25 | 0.0492 | 1.250 | |
1.30 | 0.0512 | 1.300 | |
55 | 0.0520 | 1.321 | |
1.35 | 0.0531 | 1.350 | |
54 | 0.0550 | 1.397 | |
1.40 | 0.0551 | 1.400 | |
1.45 | 0.0571 | 1.450 | |
1.50 | 0.0591 | 1.500 | |
53 | 0.0595 | 1.511 | |
1.55 | 0.0610 | 1.550 | |
1/16 | 0.0625 | 1.588 | |
1.60 | 0.0630 | 1.600 | |
52 | 0.0635 | 1.613 | |
1.65 | 0.0650 | 1.650 | |
1.70 | 0.0669 | 1.700 | |
51 | 0.0670 | 1.702 | |
1.75 | 0.0689 | 1.750 | |
50 | 0.0700 | 1.778 | |
1.80 | 0.0709 | 1.800 | |
1.85 | 0.0728 | 1.850 | |
49 | 0.0730 | 1.854 | |
1.90 | 0.0748 | 1.900 | |
48 | 0.0760 | 1.930 | |
1.95 | 0.0768 | 1.950 | |
5/64 | 0.0781 | 1.984 | |
47 | 0.0785 | 1.994 | |
2.00 | 0.0787 | 2.000 | |
2.05 | 0.0807 | 2.050 | |
46 | 0.0810 | 2.057 | |
45 | 0.0820 | 2.083 | |
2.10 | 0.0827 | 2.100 | |
2.15 | 0.0846 | 2.150 | |
44 | 0.0860 | 2.184 | |
2.20 | 0.0866 | 2.200 | |
2.25 | 0.0886 | 2.250 | |
43 | 0.0890 | 2.261 | |
2.30 | 0.0906 | 2.300 | |
2.35 | 0.0925 | 2.350 | |
42 | 0.0935 | 2.375 | |
3/32 | 0.0938 | 2.383 | |
2.40 | 0.0945 | 2.400 | |
41 | 0.0960 | 2.438 | |
2.46 | 0.0965 | 2.450 | |
40 | 0.0980 | 2.489 | |
2.50 | 0.0984 | 2.500 | |
39 | 0.0995 | 2.527 | |
38 | 0.1015 | 2.578 | |
2.60 | 0.1024 | 2.600 | |
37 | 0.1040 | 2.642 | |
2.70 | 0.1063 | 2.700 | |
36 | 0.1065 | 2.705 | |
7/64 | 0.1094 | 2.779 | |
35 | 0.1100 | 2.794 | |
2.80 | 0.1102 | 2.800 | |
34 | 0.1110 | 2.819 | |
33 | 0.1130 | 2.870 | |
2.90 | 0.1142 | 2.900 | |
32 | 0.1160 | 2.946 | |
3.00 | 0.1181 | 3.000 | |
31 | 0.1200 | 3.048 | |
3.10 | 0.1220 | 3.100 | |
1/8 | 0.1250 | 3.175 | |
3.20 | 0.1260 | 3.200 | |
30 | 0.1285 | 3.264 | |
3.30 | 0.1299 | 3.300 | |
3.40 | 0.1339 | 3.400 | |
29 | 0.1360 | 3.454 | |
3.50 | 0.1378 | 3.500 | |
28 | 0.1405 | 3.569 | |
9/64 | 0.1406 | 3.571 | |
3.60 | 0.1417 | 3.600 | |
27 | 0.1440 | 3.658 | |
3.70 | 0.1457 | 3.700 | |
26 | 0.1470 | 3.734 | |
25 | 0.1495 | 3.797 | |
3.80 | 0.1496 | 3.800 | |
24 | 0.1520 | 3.861 | |
23 | 0.1540 | 3.912 | |
5/32 | 0.1562 | 3.967 | |
22 | 0.1570 | 3.988 | |
4.00 | 0.1575 | 4.000 | |
21 | 0.1590 | 4.039 | |
20 | 0.1610 | 4.089 | |
4.10 | 0.1614 | 4.100 | |
4.20 | 0.1654 | 4.200 | |
19 | 0.1660 | 4.216 | |
4.30 | 0.1693 | 4.300 | |
18 | 0.1695 | 4.305 | |
11/64 | 0.1719 | 4.366 | |
17 | 0.1730 | 4.394 | |
4.40 | 0.1732 | 4.400 | |
16 | 0.1770 | 4.496 | |
4.50 | 0.1772 | 4.500 | |
15 | 0.1800 | 4.572 | |
4.60 | 0.1811 | 4.600 | |
14 | 0.1820 | 4.623 | |
13 | 4.70 | 0.1850 | 4.700 |
3/16 | 0.1875 | 4.762 | |
12 | 4.80 | 0.1890 | 4.800 |
11 | 0.1910 | 4.851 | |
4.90 | 0.1929 | 4.900 | |
10 | 0.1935 | 4.915 | |
9 | 0.1960 | 4.978 | |
5.00 | 0.1969 | 5.000 | |
8 | 0.1990 | 5.054 | |
5.10 | 0.2008 | 5.100 | |
7 | 0.2010 | 5.105 | |
13/64 | 0.2031 | 5.159 | |
6 | 0.2040 | 5.182 | |
5.20 | 0.2047 | 5.200 | |
5 | 0.2055 | 5.220 | |
5.30 | 0.2087 | 5.300 | |
4 | 0.2090 | 5.309 | |
5.40 | 0.2126 | 5.400 | |
3 | 0.2130 | 5.410 | |
5.50 | 0.2165 | 5.500 | |
7/32 | 0.2188 | 5.558 | |
5.60 | 0.2205 | 5.600 | |
2 | 0.2210 | 5.613 | |
5.70 | 0.2244 | 5.700 | |
1 | 0.2280 | 5.791 | |
5.80 | 0.2283 | 5.800 | |
5.90 | 0.2323 | 5.900 | |
A | 0.2340 | 5.944 | |
15/64 | 0.2344 | 5.954 | |
6.00 | 0.2362 | 6.000 | |
B | 0.2380 | 6.045 | |
6.10 | 0.2402 | 6.100 | |
C | 0.2420 | 6.147 | |
6.20 | 0.2441 | 6.200 | |
D | 0.2460 | 6.248 | |
6.30 | 0.2480 | 6.300 | |
E, 1/4 | 0.2500 | 6.350 | |
6.40 | 0.2520 | 6.400 | |
6.50 | 0.2559 | 6.500 | |
F | 0.2570 | 6.528 | |
6.60 | 0.2598 | 6.600 | |
G | 0.2610 | 6.629 | |
6.70 | 0.2638 | 6.700 | |
17/64 | 0.2656 | 6.746 | |
H | 0.2660 | 6.756 | |
6.80 | 0.2677 | 6.800 | |
6.90 | 0.2717 | 6.900 | |
I | 0.2720 | 6.909 | |
7.00 | 0.2756 | 7.000 | |
J | 0.2770 | 7.036 | |
7.10 | 0.2795 | 7.100 | |
K | 0.2810 | 7.137 | |
9/32 | 0.2812 | 7.142 | |
7.20 | 0.2835 | 7.200 | |
7.30 | 0.2874 | 7.300 | |
L | 0.2900 | 7.366 | |
7.40 | 0.2913 | 7.400 | |
M | 0.2950 | 7.493 | |
7.50 | 0.2953 | 7.500 | |
19/64 | 0.2969 | 7.541 | |
7.60 | 0.2992 | 7.600 | |
N | 0.3020 | 7.671 | |
7.70 | 0.3031 | 7.700 | |
7.80 | 0.3071 | 7.800 | |
7.90 | 0.3110 | 7.900 | |
5/16 | 0.3125 | 7.938 | |
8.00 | 0.3150 | 8.000 | |
O | 0.3160 | 8.026 | |
8.10 | 0.3189 | 8.100 | |
8.20 | 0.3228 | 8.200 | |
P | 0.3230 | 8.204 | |
8.30 | 0.3268 | 8.300 | |
21/64 | 0.3281 | 8.334 | |
8.40 | 0.3307 | 8.400 | |
Q | 0.3320 | 8.433 | |
8.50 | 0.3346 | 8.500 | |
8.60 | 0.3386 | 8.600 | |
R | 0.3390 | 8.611 | |
8.70 | 0.3425 | 8.700 | |
11/32 | 0.3438 | 8.733 | |
8.80 | 0.3465 | 8.800 | |
S | 0.3480 | 8.839 | |
8.90 | 0.3504 | 8.900 | |
9.00 | 0.3543 | 9.000 | |
T | 0.3580 | 9.093 | |
9.10 | 0.3583 | 9.100 | |
23/64 | 0.3594 | 9.129 | |
9.20 | 0.3622 | 9.200 | |
9.30 | 0.3661 | 9.300 | |
U | 0.3680 | 9.347 | |
9.40 | 0.3701 | 9.400 | |
9.50 | 0.3740 | 9.500 | |
3/8 | 0.3750 | 9.525 | |
V | 0.3770 | 9.576 | |
9.60 | 0.3780 | 9.600 | |
9.70 | 0.3819 | 9.700 | |
9.80 | 0.3858 | 9.800 | |
w | 0.3860 | 9.804 | |
9.90 | 0.3898 | 9.900 | |
25/64 | 0.3906 | 9.921 | |
10.00 | 0.3937 | 10.000 | |
X | 0.3970 | 10.084 | |
10.20 | 0.4016 | 10.200 | |
Y | 0.4040 | 10.262 | |
13/32 | 0.4062 | 10.317 | |
Z | 0.4130 | 10.490 | |
10.50 | 0.4134 | 10.500 | |
27/64 | 0.4219 | 10.716 | |
10.80 | 0.4252 | 10.800 | |
11.00 | 0.4331 | 11.000 | |
7/16 | 0.4375 | 11.112 | |
11.20 | 0.4409 | 11.200 | |
29/64 | 11.50 | 0.4528 | 11.500 |
0.4531 | 11.509 | ||
11.80 | 0.4646 | 11.800 | |
15/32 | 0.4688 | 11.908 | |
12.00 | 0.4724 | 12.000 | |
12.20 | 0.4803 | 12.200 | |
31/64 | 0.4844 | 12.304 | |
12.50 | 0.4921 | 12.500 | |
1/2 | 0.5000 | 12.700 | |
12.80 | 0.5039 | 12.800 | |
13.00 | 0.5118 | 13.000 | |
33/64 | 0.5156 | 13.096 | |
13.20 | 0.5197 | 13.200 | |
17/32 | 0.5312 | 13.492 | |
13.50 | 0.5315 | 13.500 | |
13.80 | 0.5433 | 13.800 | |
35/64 | 0.5469 | 13.891 | |
14.00 | 0.5512 | 14.000 | |
14.25 | 0.5610 | 14.250 | |
9/16 | 0.5625 | 14.288 | |
14.50 | 0.5709 | 14.500 | |
37/64 | 0.5781 | 14.684 | |
14.75 | 0.5807 | 14.750 | |
15.00 | 0.5906 | 15.000 | |
19/32 | 0.5938 | 15.083 | |
15.25 | 0.6004 | 15.250 | |
39/64 | 0.6094 | 15.479 | |
15.50 | 0.6102 | 15.500 | |
15.75 | 0.6201 | 15.750 | |
5/8 | 0.6250 | 15.875 | |
16.00 | 0.6299 | 16.000 | |
16.25 | 0.6398 | 16.250 | |
16.50 | 0.4528 | 11.500 | |
41/64 | 0.6406 | 16.271 | |
16.50 | 0.6496 | 16.500 | |
21/32 | 0.6562 | 16.669 | |
16.75 | 0.6594 | 16.750 | |
17.00 | 0.6693 | 17.000 | |
43/64 | 0.6719 | 17.066 | |
17.25 | 0.6791 | 17.250 | |
11/16 | 0.6875 | 17.462 | |
17.50 | 0.6890 | 17.500 | |
45/64 | 0.7031 | 17.859 | |
18.00 | 0.7087 | 18.000 | |
23/32 | 0.7188 | 18.258 | |
18.50 | 0.7283 | 18.500 | |
47/64 | 0.7344 | 18.654 | |
19.00 | 0.7480 | 19.000 | |
3/4 | 0.7500 | 19.050 | |
49/64 | 0.7656 | 19.446 | |
25/n | 19.50 | 0.7677 0.7812 | 19.500 19.845 |
20.00 | 0.7879 | 20.000 | |
51/64 | 0.7969 | 20.241 | |
20.50 | 0.8071 | 20.500 | |
13/16 | 0.8125 | 20.638 | |
21.00 | 0.8268 | 21.000 | |
53/64 | 0.8281 | 21.034 | |
27/32 | 0.8438 | 21.433 | |
21.50 | 0.8465 | 21.500 | |
55/64 | 0.8594 | 21.829 | |
22.00 | 0.8661 | 22.000 | |
7/8 | 0.8750 | 22.225 | |
22.50 | 0.8858 | 22.500 | |
57/64 | 0.8906 | 22.621 | |
23.00 | 0.9055 | 23.000 | |
29/32 | 0.9062 | 23.017 | |
59/64 | 0.9219 | 23.416 | |
23.50 | 0.9252 | 23.500 | |
15/16 | 0.9375 | 23.812 | |
24.00 | 0.9449 | 24.000 | |
61/64 | 0.9531 | 24.209 | |
24.50 | 0.9646 | 24.500 | |
31/32 | 0.9688 | 24.608 | |
25.00 | 0.9843 | 25.000 | |
63/64 | 0.9844 | 25.004 | |
1 | 1.0000 | 25.400 |