Standard drill sizes chart

Decimal-inch equivalents for standard number, letter and fractional drill sizes.

Standard drill sizes chart
Drill Decimal
80 .0135″
79 .0145″
1/64 .0156″
78 .0160″
77 .0180″
76 .0200″
75 .0210″
74 .0225″
73 .0240″
72 .0250″
71 .0260″
70 .0280″
69 .0292″
68 .0310″
1/32 .0313″
67 .0320″
66 .0330″
65 .0350″
64 .0360″
63 .0370″
62 .0380″
61 .0390″
60 .0400″
59 .0410″
58 .0420″
57 .0430″
56 .0465″
3/64 .0469″
55 .0520″
54 .0550″
53 .0595″
1/16 .0625″
52 .0635″
51 .0670″
50 .0700″
49 .0730″
48 .0760″
5/64 .0781″
47 .0785″
46 .0810″
45 .0820″
44 .0860″
43 .0890″
42 .0935″
3/32 .0938″
41 .0960″
40 .0980″
39 .0995″
38 .1015″
37 .1040″
36 .1065″
7/64 .1094″
35 .1100″
34 .1110″
33 .1130″
32 .1160″
31 .1200″
1/8 .1250″
30 .1285″
29 .1360″
28 .1405″
9/64 .1406″
27 .1440″
26 .1470″
25 .1495″
24 .1520″
23 .1540″
5/32 .1562″
22 .1570″
21 .1590″
20 .1610″
19 .1660″
18 .1695
11/64 .1719″
17 .1730″
16 .1770″
15 .1800″
14 .1820″
13 .1850″
3/16 .1875″
12 .1890″
11 .1910″
10 .1935″
9 .1960″
8 .1990″
7 .2010″
13/64 .2031″
6 .2040″
5 .2055″
4 .2090″
3 .2130″
7/32 .2188″
2 .2210″
1 .2280″
A .2340″
15/64 .2344″
B .2380″
C .2420″
D .2460″
E .2500″
1/4 .2500″
F .2570″
G .2610″
17/64 .2656″
H .2660″
I .2720″
J .2770″
K .2810″
9/32 .2812″
L .2900″
M .2950″
19/64 .2969″
N .3020″
5/16 .3125″
O .3160″
P .3230″
21/64 .3281″
Q .3320″
R .3390″
11/32 .3438″
S .3480″
T .3580″
23/64 .3594″
U .3680″
3/8 .3750″
V .3770″
W .3860″
25/64 .3906″
X .3970″
Y .4040″
13/32 .4062″
Z .4130″
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 1.000″