Drill Bit Size Chart

ANSI Size Drills							Metric Size Drills and Inch Conversion
Drill (in.)	Decimal	Drill (in.)	Decimal	Drill (in.)	Decimal		Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)
80	.0135	52	.0635	25	.1495		.35	.0138	1.65	.0650	3.1	.1220
79	.0145	51	.0670	24	.1520		.4	.0157	1.7	.0669	3.2	.1260
1/64	.0156	50	.0700	23	.1540		.45	.0177	1.75	.0689	3.25	.1280
78	.0160	49	.0730	5/32	.1562		.5	.0197	1.8	.0709	3.3	.1299
77	.0180	48	.0760	22	.1570		.55	.0217	1.85	.0728	3.4	.1339
76	.0200	5/64	.0781	21	.1590		.6	.0236	1.9	.0748	3.5	.1378
75	.0210	47	.0785	20	.1610		.65	.0256	1.95	.0768	3.6	.1417
74	.0225	46	.0810	19	.1660		.7	.0276	2.0	.0787	3.7	.1457
73	.0240	45	.0820	18	.1695		.75	.0295	2.05	.0807	3.75	.1477
72	.0250	44	.0860	11/64	.1719		.8	.0315	2.1	.0827	3.8	.1496
71	.0260	43	.0890	17	.1730		.85	.0335	2.15	.0846	3.9	.1535
70	.0280	42	.0935	16	.1770		.9	.0355	2.2	.0866	4.0	.1575
69	.0292	3/32	.0937	15	.1800		.95	.0374	2.25	.0886	4.1	.1614
68	.0310	41	.0960	14	.1820		1.0	.0394	2.3	.0905	4.2	.1654
1/32	.0313	40	.0980	13	.1850		1.05	.0413	2.35	.0925	4.25	.1674
67	.0320	39	.0995	3/16	.1875		1.1	.0433	2.4	.0945	4.3	.1693
66	.0330	38	.1015	12	.1890		1.15	.0453	2.45	.0965	4.4	.1732
65	.0350	37	.1040	11	.1910		1.2	.0472	2.5	.0984	4.5	.1771
64	.0360	36	.1065	10	.1935		1.25	.0492	2.55	.1004	4.6	.1811
63	.0370	7/64	.1093	9	.1960		1.3	.0512	2.6	.1024	4.7	.1850
62	.0380	35	.1100	8	.1990		1.35	.0531	2.65	.1043	4.75	.1870
61	.0390	34	.1110	7	.2010		1.4	.0551	2.7	.1063	4.8	.1890
60	.0400	33	.1130	13/64	.2031		1.45	.0571	2.75	.1083	4.9	.1929
59	.0410	32	.1160	6	.2040		1.5	.0591	2.8	.1102	5.0	.1968
58	.0420	31	.1200	5	.2055		1.55	.0610	2.9	.1142
57	.0430	1/8	.1250	4	.2090		1.6	.0629	3.0	.1181
56	.0465	30	.1285	3	.2130
3/64	.0469	29	.1360	7/32	.2187
55	.0520	28	.1405	2	.2210
54	.0550	9/64	.1406	1	.2280
53	.0595	27	.1440
1/16	.0625	26	.1470