Inch Metric Drill Sizes Chart
Drill Size | Decimal Equivalent [inches] | Drill Size | Decimal Equivalent [inches] | Drill Size | Decimal Equivalent [inches] | ||
80 | 0.0135 | 47 | 0.0785 | 21 | 0.1590 | ||
79 | 0.0145 | 2.0 mm | 0.0787 | 20 | 0.1610 | ||
78 | 0.0160 | 2.05 mm | 0.0807 | 4.1 mm | 0.1614 | ||
77 | 0.0180 | 46 | 0.0810 | 4.2 mm | 0.1654 | ||
76 | 0.0200 | 45 | 0.0820 | 19 | 0.1660 | ||
75 | 0.0210 | 2.1 mm | 0.0827 | 4.3 mm | 0.1693 | ||
74 | 0.0225 | 2.15 mm | 0.0846 | 18 | 0.1695 | ||
73 | 0.0240 | 44 | 0.0860 | 11/64 | 0.1719 | ||
72 | 0.0250 | 2.2 mm | 0.0866 | 17 | 0.1730 | ||
71 | 0.0260 | 2.25 mm | 0.0886 | 4.4 mm | 0.1732 | ||
70 | 0.0280 | 43 | 0.0890 | 16 | 0.1770 | ||
69 | 0.0292 | 2.3 mm | 0.0905 | 4.5 mm | 0.1771 | ||
68 | 0.0310 | 2.35 mm | 0.0925 | 15 | 0.1800 | ||
67 | 0.0320 | 42 | 0.0935 | 4.6 mm | 0.1811 | ||
66 | 0.0330 | 3/32 | 0.0937 | 14 | 0.1820 | ||
65 | 0.0350 | 2.4 mm | 0.0945 | 13 | 0.1850 | ||
64 | 0.0360 | 41 | 0.0960 | 4.7 mm | 0.1850 | ||
63 | 0.0370 | 2.45 mm | 0.0965 | 3/16 | 0.1875 | ||
62 | 0.0380 | 40 | 0.0980 | 12 | 0.1890 | ||
62 | 0.0380 | 2.5 mm | 0.0984 | 4.8 mm | 0.1890 | ||
61 | 0.0390 | 39 | 0.0995 | 11 | 0.1910 | ||
61 | 0.0390 | 38 | 0.1015 | 4.9 mm | 0.1929 | ||
1.0 mm | 0.0394 | 2.6 mm | 0.1024 | 10 | 0.1935 | ||
60 | 0.0400 | 37 | 0.1040 | 9 | 0.1960 | ||
59 | 0.0410 | 2.7 mm | 0.1063 | 5.0 mm | 0.1968 | ||
1.05 mm | 0.0413 | 36 | 0.1065 | 8 | 0.1990 | ||
58 | 0.0420 | 7/64 | 0.1093 | 5.1 mm | 0.2008 | ||
57 | 0.0430 | 35 | 0.1100 | 7 | 0.2010 | ||
1.1 mm | 0.0433 | 2.8 mm | 0.1102 | 13/64 | 0.2031 | ||
1.15 mm | 0.0453 | 34 | 0.1110 | 6 | 0.2040 | ||
56 | 0.0465 | 33 | 0.1130 | 5.2 mm | 0.2047 | ||
1.2 mm | 0.0472 | 2.9 mm | 0.1142 | 5 | 0.2055 | ||
1.25 mm | 0.0492 | 32 | 0.1160 | 5.3 mm | 0.2087 | ||
1.3 mm | 0.0512 | 3.0 mm | 0.1181 | 4 | 0.2090 | ||
55 | 0.0520 | 31 | 0.1200 | 5.4 mm | 0.2126 | ||
1.35 mm | 0.0531 | 3.1 mm | 0.1220 | 3 | 0.2130 | ||
54 | 0.0550 | 1/8 | 0.1250 | 5.5 mm | 0.2165 | ||
1.4 mm | 0.0551 | 3.2 mm | 0.1260 | 7/32 | 0.2187 | ||
1.45 mm | 0.0571 | 30 | 0.1285 | 5.6 mm | 0.2205 | ||
1.5 mm | 0.0591 | 3.3 mm | 0.1299 | 2 | 0.2210 | ||
53 | 0.0595 | 3.4 mm | 0.1339 | 5.7 mm | 0.2244 | ||
1.55 mm | 0.0610 | 29 | 0.1360 | 1 | 0.2280 | ||
1/16 | 0.0625 | 3.5 mm | 0.1378 | 5.8 mm | 0.2283 | ||
1.6 mm | 0.0629 | 28 | 0.1405 | 5.9 mm | 0.2323 | ||
52 | 0.0635 | 9/64 | 0.1406 | A | 0.2340 | ||
1.65 mm | 0.0650 | 3.6 mm | 0.1417 | 15/64 | 0.2344 | ||
1.7 mm | 0.0669 | 27 | 0.1440 | 6.0 mm | 0.2362 | ||
51 | 0.0670 | 3.7 mm | 0.1457 | B | 0.2380 | ||
1.75 mm | 0.0689 | 26 | 0.1470 | 6.1 mm | 0.2401 | ||
50 | 0.0700 | 25 | 0.1495 | C | 0.2420 | ||
1.8 mm | 0.0709 | 3.8 mm | 0.1496 | 6.2 mm | 0.2441 | ||
1.85 mm | 0.0728 | 24 | 0.1520 | D | 0.2460 | ||
49 | 0.0730 | 3.9 mm | 0.1535 | 6.3 mm | 0.2480 | ||
1.9 mm | 0.0748 | 23 | 0.1540 | E | 0.2500 | ||
48 | 0.0760 | 5/32 | 0.1562 | 1/4 | 0.2500 | ||
1.95 mm | 0.0768 | 22 | 0.1570 | 6.4 mm | 0.2520 | ||
5/64 | 0.0781 | 4.0 mm | 0.1575 | 6.5 mm | 0.2559 |
Drill Size | Decimal Equivalent [inches] | Drill Size | Decimal Equivalent [inches] | |
F | 0.2570 | 9.8 mm | 0.3858 | |
6.6 mm | 0.2598 | W | 0.3860 | |
G | 0.2610 | 9.9 mm | 0.3898 | |
6.7 mm | 0.2638 | 25/64 | 0.3906 | |
17/64 | 0.2656 | 10.0 mm | 0.3937 | |
H | 0.2660 | X | 0.3970 | |
6.8 mm | 0.2677 | 10.2 mm | 0.4016 | |
6.9 mm | 0.2716 | Y | 0.404 | |
I | 0.2720 | 13/32 | 0.4062 | |
7.0 mm | 0.2756 | Z | 0.4130 | |
J | 0.2770 | 10.5 mm | 0.4133 | |
7.1 mm | 0.2795 | 27/64 | 0.4219 | |
K | 0.2811 | 10.8 mm | 0.4252 | |
9/32 | 0.2812 | 11.0 mm | 0.4331 | |
7.2 mm | 0.2835 | 7/16 | 0.4375 | |
7.3 mm | 0.2874 | 11.2 mm | 0.4409 | |
L | 0.2900 | 11.5 mm | 0.4528 | |
7.4 mm | 0.2913 | 29/64 | 0.4531 | |
M | 0.2950 | 11.8 mm | 0.4646 | |
7.5 mm | 0.2953 | 15/32 | 0.4687 | |
19/64 | 0.2968 | 12.0 mm | 0.4724 | |
7.6 mm | 0.2990 | 12.2 mm | 0.4803 | |
N | 0.3020 | 31/64 | 0.4844 | |
7.7 mm | 0.3031 | 12.5 mm | 0.4921 | |
7.8 mm | 0.3071 | 1/2 | 0.5000 | |
7.9 mm | 0.3110 | 12.8 mm | 0.5039 | |
5/16 | 0.3125 | 13.0 mm | 0.5118 | |
8.0 mm | 0.3150 | 33/64 | 0.5156 | |
O | 0.3160 | 17/32 | 0.5312 | |
8.1 mm | 0.3189 | 35/64 | 0.5469 | |
8.2 mm | 0.3228 | 9/16 | 0.5625 | |
P | 0.3230 | 37/64 | 0.5781 | |
8.3 mm | 0.3267 | 19/32 | 0.5937 | |
21/64 | 0.3281 | 5/8 | 0.6250 | |
8.4 mm | 0.3307 | 21/32 | 0.6562 | |
Q | 0.3320 | 43/64 | 0.6719 | |
8.5 mm | 0.3346 | 11/16 | 0.6875 | |
8.6 mm | 0.3386 | 45/64 | 0.7031 | |
R | 0.3390 | 23/32 | 0.7187 | |
8.7 mm | 0.3425 | 47/64 | 0.7344 | |
11/32 | 0.3437 | 3/4 | 0.7500 | |
8.8 mm | 0.3465 | 49/64 | 0.7656 | |
S | 0.3480 | 25/32 | 0.7812 | |
8.9 mm | 0.3504 | 51/64 | 0.7969 | |
9.0 mm | 0.3543 | 53/64 | 0.8281 | |
T | 0.3580 | 27/32 | 0.8594 | |
9.1 mm | 0.3583 | 55/64 | 0.8594 | |
23/64 | 0.3594 | 7/8 | 0.8750 | |
9.2 mm | 0.3622 | 57/64 | 0.8906 | |
9.3 mm | 0.3661 | 29/32 | 0.9062 | |
U | 0.3680 | 13/16 | 0.9125 | |
9.4 mm | 0.3701 | 59/64 | 0.9219 | |
9.5 mm | 0.3740 | 15/16 | 0.9375 | |
3/8 | 0.3750 | 61/64 | 0.9531 | |
V | 0.3770 | 31/32 | 0.9687 | |
9.6 mm | 0.3780 | 63/64 | 0.9844 | |
9.7 mm | 0.3819 | 1 | 1.0000 |