Drill Size Chart

Size	Decimal (inch)	Metric (mm)	Type
Fractional Drill Sizes
1/64	0.0156	0.40	Fraction
1/32	0.0313	0.79	Fraction
3/64	0.0469	1.19	Fraction
1/16	0.0625	1.59	Fraction
5/64	0.0781	1.98	Fraction
3/32	0.0938	2.38	Fraction
7/64	0.1094	2.78	Fraction
1/8	0.1250	3.18	Fraction
9/64	0.1406	3.57	Fraction
5/32	0.1563	3.97	Fraction
11/64	0.1719	4.37	Fraction
3/16	0.1875	4.76	Fraction
13/64	0.2031	5.16	Fraction
7/32	0.2188	5.56	Fraction
15/64	0.2344	5.95	Fraction
1/4	0.2500	6.35	Fraction
17/64	0.2656	6.75	Fraction
9/32	0.2813	7.14	Fraction
19/64	0.2969	7.54	Fraction
5/16	0.3125	7.94	Fraction
21/64	0.3281	8.33	Fraction
11/32	0.3438	8.73	Fraction
23/64	0.3594	9.13	Fraction
3/8	0.3750	9.53	Fraction
25/64	0.3906	9.92	Fraction
13/32	0.4063	10.32	Fraction
27/64	0.4219	10.72	Fraction
7/16	0.4375	11.11	Fraction
29/64	0.4531	11.51	Fraction
15/32	0.4688	11.91	Fraction
31/64	0.4844	12.30	Fraction
1/2	0.5000	12.70	Fraction
33/64	0.5156	13.10	Fraction
17/32	0.5313	13.49	Fraction
35/64	0.5469	13.89	Fraction
9/16	0.5625	14.29	Fraction
37/64	0.5781	14.68	Fraction
19/32	0.5938	15.08	Fraction
39/64	0.6094	15.48	Fraction
5/8	0.6250	15.88	Fraction
41/64	0.6406	16.27	Fraction
21/32	0.6563	16.67	Fraction
43/64	0.6719	17.07	Fraction
11/16	0.6875	17.46	Fraction
45/64	0.7031	17.86	Fraction
23/32	0.7188	18.26	Fraction
47/64	0.7344	18.65	Fraction
3/4	0.7500	19.05	Fraction
49/64	0.7656	19.45	Fraction
25/32	0.7813	19.84	Fraction
51/64	0.7969	20.24	Fraction
13/16	0.8125	20.64	Fraction
53/64	0.8281	21.03	Fraction
27/32	0.8438	21.43	Fraction
55/64	0.8594	21.83	Fraction
7/8	0.8750	22.23	Fraction
57/64	0.8906	22.62	Fraction
29/32	0.9063	23.02	Fraction
59/64	0.9219	23.42	Fraction
15/16	0.9375	23.81	Fraction
61/64	0.9531	24.21	Fraction
31/32	0.9688	24.61	Fraction
63/64	0.9844	25.01	Fraction
1	1.0000	25.40	Fraction
Number Drill Sizes (#80 – #1)
#80	0.0135	0.34	Number
#79	0.0145	0.37	Number
#78	0.0160	0.41	Number
#77	0.0180	0.46	Number
#76	0.0200	0.51	Number
#75	0.0210	0.53	Number
#74	0.0225	0.57	Number
#73	0.0240	0.61	Number
#72	0.0250	0.64	Number
#71	0.0260	0.66	Number
#70	0.0280	0.71	Number
#69	0.0292	0.74	Number
#68	0.0310	0.79	Number
#67	0.0320	0.81	Number
#66	0.0330	0.84	Number
#65	0.0350	0.89	Number
#64	0.0360	0.91	Number
#63	0.0370	0.94	Number
#62	0.0380	0.97	Number
#61	0.0390	0.99	Number
#60	0.0400	1.02	Number
#59	0.0410	1.04	Number
#58	0.0420	1.07	Number
#57	0.0430	1.09	Number
#56	0.0465	1.18	Number
#55	0.0520	1.32	Number
#54	0.0550	1.40	Number
#53	0.0595	1.51	Number
#52	0.0635	1.61	Number
#51	0.0670	1.70	Number
#50	0.0700	1.78	Number
#49	0.0730	1.85	Number
#48	0.0760	1.93	Number
#47	0.0785	1.99	Number
#46	0.0810	2.06	Number
#45	0.0820	2.08	Number
#44	0.0860	2.18	Number
#43	0.0890	2.26	Number
#42	0.0935	2.38	Number
#41	0.0960	2.44	Number
#40	0.0980	2.49	Number
#39	0.0995	2.53	Number
#38	0.1015	2.58	Number
#37	0.1040	2.64	Number
#36	0.1065	2.70	Number
#35	0.1100	2.79	Number
#34	0.1110	2.82	Number
#33	0.1130	2.87	Number
#32	0.1160	2.95	Number
#31	0.1200	3.05	Number
#30	0.1285	3.26	Number
#29	0.1360	3.45	Number
#28	0.1405	3.57	Number
#27	0.1440	3.66	Number
#26	0.1470	3.73	Number
#25	0.1495	3.80	Number
#24	0.1520	3.86	Number
#23	0.1540	3.91	Number
#22	0.1570	3.99	Number
#21	0.1590	4.04	Number
#20	0.1610	4.09	Number
#19	0.1660	4.22	Number
#18	0.1695	4.31	Number
#17	0.1730	4.39	Number
#16	0.1770	4.50	Number
#15	0.1800	4.57	Number
#14	0.1820	4.62	Number
#13	0.1850	4.70	Number
#12	0.1890	4.80	Number
#11	0.1910	4.85	Number
#10	0.1935	4.91	Number
#9	0.1960	4.98	Number
#8	0.1990	5.05	Number
#7	0.2010	5.11	Number
#6	0.2040	5.18	Number
#5	0.2055	5.22	Number
#4	0.2090	5.31	Number
#3	0.2130	5.41	Number
#2	0.2210	5.61	Number
#1	0.2280	5.79	Number
Letter Drill Sizes (A – Z)
A	0.2340	5.94	Letter
B	0.2380	6.05	Letter
C	0.2420	6.15	Letter
D	0.2460	6.25	Letter
E	0.2500	6.35	Letter
F	0.2570	6.53	Letter
G	0.2610	6.63	Letter
H	0.2660	6.76	Letter
I	0.2720	6.91	Letter
J	0.2770	7.04	Letter
K	0.2810	7.14	Letter
L	0.2900	7.37	Letter
M	0.2950	7.49	Letter
N	0.3020	7.67	Letter
O	0.3160	8.03	Letter
P	0.3230	8.20	Letter
Q	0.3320	8.43	Letter
R	0.3390	8.61	Letter
S	0.3480	8.84	Letter
T	0.3580	9.09	Letter
U	0.3680	9.35	Letter
V	0.3770	9.58	Letter
W	0.3860	9.80	Letter
X	0.3970	10.08	Letter
Y	0.4040	10.26	Letter
Z	0.4130	10.49	Letter
Metric Drill Sizes
0.2 mm	0.0079	0.20	Metric
0.3 mm	0.0118	0.30	Metric
0.4 mm	0.0157	0.40	Metric
0.5 mm	0.0197	0.50	Metric
0.6 mm	0.0236	0.60	Metric
0.7 mm	0.0276	0.70	Metric
0.8 mm	0.0315	0.80	Metric
0.9 mm	0.0354	0.90	Metric
1.0 mm	0.0394	1.00	Metric
1.1 mm	0.0433	1.10	Metric
1.2 mm	0.0472	1.20	Metric
1.3 mm	0.0512	1.30	Metric
1.4 mm	0.0551	1.40	Metric
1.5 mm	0.0591	1.50	Metric
1.6 mm	0.0630	1.60	Metric
1.7 mm	0.0669	1.70	Metric
1.8 mm	0.0709	1.80	Metric
1.9 mm	0.0748	1.90	Metric
2.0 mm	0.0787	2.00	Metric
2.1 mm	0.0827	2.10	Metric
2.2 mm	0.0866	2.20	Metric
2.3 mm	0.0906	2.30	Metric
2.4 mm	0.0945	2.40	Metric
2.5 mm	0.0984	2.50	Metric
2.6 mm	0.1024	2.60	Metric
2.7 mm	0.1063	2.70	Metric
2.8 mm	0.1102	2.80	Metric
2.9 mm	0.1142	2.90	Metric
3.0 mm	0.1181	3.00	Metric
3.2 mm	0.1260	3.20	Metric
3.3 mm	0.1299	3.30	Metric
3.4 mm	0.1339	3.40	Metric
3.5 mm	0.1378	3.50	Metric
3.6 mm	0.1417	3.60	Metric
3.7 mm	0.1457	3.70	Metric
3.8 mm	0.1496	3.80	Metric
3.9 mm	0.1535	3.90	Metric
4.0 mm	0.1575	4.00	Metric
4.1 mm	0.1614	4.10	Metric
4.2 mm	0.1654	4.20	Metric
4.3 mm	0.1693	4.30	Metric
4.4 mm	0.1732	4.40	Metric
4.5 mm	0.1772	4.50	Metric
4.6 mm	0.1811	4.60	Metric
4.7 mm	0.1850	4.70	Metric
4.8 mm	0.1890	4.80	Metric
4.9 mm	0.1929	4.90	Metric
5.0 mm	0.1969	5.00	Metric
6 mm	0.2362	6.00	Metric
7 mm	0.2756	7.00	Metric
8 mm	0.3150	8.00	Metric
9 mm	0.3543	9.00	Metric
10 mm	0.3937	10.00	Metric
11 mm	0.4331	11.00	Metric
12 mm	0.4724	12.00	Metric
13 mm	0.5118	13.00	Metric
14 mm	0.5512	14.00	Metric
15 mm	0.5906	15.00	Metric
16 mm	0.6299	16.00	Metric
17 mm	0.6693	17.00	Metric
18 mm	0.7087	18.00	Metric
19 mm	0.7480	19.00	Metric
20 mm	0.7874	20.00	Metric