Drill sizes; numbers, letters, and fractions

Helpful for race car, hot rod, and custom car builders

More tech info

Number and Letter DrillsFractional DrillsDecimal Equivalents
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
1/32.0312
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
3/32.0937
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....1720
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
7/32.2187
2....2210
1....2280
A....2340
15/64.2344
B....2380
C....2420
D....2460
E1/4.2500
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
11/32.3437
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
15/32.4687
31/64.4844
1/2.5000
33/64.5156
17/32.5312
35/64.5469
9/16.5625
37/64.5781
19/32.5937
39/64.6094
5/8.6250
41/64.6406
21/32.6562
43/64.6719
11/16.6875
45/64.7031
23/32.7187
47/64.7344
3/4.7500
49/64.7656
25/32.7812
51/64.7969
13/16.8125
53/64.8281
27/32.8437
55/64.8594
7/8.8750
57/64.8906
29/32.9062
59/64.9219
15/16.9375
61/64.9531
31/32.9687
63/64.9844
11.0000

More tech info

Auto-ware main page

Copyright AutoWare 1997,98