ANSI Size Drills
Drill (in.)	Decimal	Drill (in.)	Decimal	Drill (in.)	Decimal	Drill (in.)	Decimal	Drill (in.)	Decimal
80	.0135	50	.0700	22	.1570	G	.2610	31/64	.4844
79	0145	49	.0730	21	.1590	17/64	.2656	½	.5000
1/64	0156	48	.0760	20	.1610	H	.2660	33/64	.5156
78	0160	5/64	.0781	19	.1660	I	.2720	17/32	.5312
77	0180	47	.0785	18	.1695	J	.2770	35/64	.5469
76	0200	46	.0810	11/64	.1719	K	.2811	9/16	.5625
75	0210	45	.0820	17	.1730	9/32	.2812	37/64	.5781
74	0225	44	.0860	16	.1770	L	.2900	19/32	.5937
73	0240	43	.0890	15	.1800	M	.2950	39/64	.6094
72	0250	42	.0935	14	.1820	19/64	.2968	5/8	.6250
71	0260	3/32	.0937	13	.1850	N	.3020	41/64	.6406
70	0280	41	.0960	3/16	.1875	5/16	.3125	21/32	.6562
69	0292	40	.0980	12	.1890	O	.3160	43/64	.6719
68	0310	39	.0995	11	.1910	P	.3230	11/16	.6875
1/32	0313	38	.1015	10	.1935	21/64	.3281	45/64	.7031
67	.0320	37	.1040	9	.1960	Q	.3320	23/32	.7187
66	.0330	36	.1065	8	.1990	R	.3390	47/64	.7344
65	.0350	7/64	.1093	7	.2010	11/32	.3437	¾	.7500
64	.0360	35	.1100	13/64	.2031	S	.3480	49/64	.7656
63	.0370	34	.1110	6	.2040	T	.3580	25/32	.7812
62	.0380	33	.1130	5	.2055	23/64	.3594	51/64	.7969
61	.0390	32	.1160	4	.2090	U	.3680	13/16	.8125
60	.0400	31	.1200	3	.2130	3/8	.3750	53/64	.8281
59	.0410	1/8	.1250	7/32	.2187	V	.3770	27/32	.8437
58	.0420	30	.1285	2	.2210	W	.3860	55/64	.8594
57	.0430	29	.1360	1	.2280	25/64	.3906	7/8	.8750
56	.0465	28	.1405	A	.2340	X	.3970	57/64	.8906
3/64	.0469	9/64	.1406	15/64	.2344	Y	.4040	29/32	.9062
55	.0520	27	.1440	B	.2380	13/32	.4062	59/64	.9219
54	.0550	26	.1470	C	.2420	Z	.4130	15/16	.9375
53	.0595	25	.1495	D	.2460	27/64	.4219	61/64	.9531
1/16	.0625	24	.1520	E	.2500	7/16	.4375	31/32	.9687
52	.0635	23	.1540	¼	.2500	29/64	.4531	63/64	.9844
51	.0670	5/32	.1562	F	.2570	15/32	.4687	1	1.000

ISO (Metric Size Drills) and Conversion to Inches
Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)	Drill (mm)	Decimal (in.)
.35	.0138	2.05	.0807	4.4	.1732	7.25	.2855	11.0	.4331
.4	.0157	2.1	.0827	4.5	.1771	7.3	.2874	11.5	.4528
.45	.0177	2.15	.0846	4.6	.1811	7.4	.2913	12.0	.4724
.5	.0197	2.2	.0866	4.7	.1850	7.5	.2953	12.5	.4921
.55	.0217	2.25	.0886	4.75	.1870	7.6	.2990	13.0	.5118
.6	.0236	2.3	.0905	4.8	.1890	7.7	.3031	13.5	.5315
.65	.0256	2.35	.0925	4.9	.1929	7.75	.3051	14.0	.5512
.7	.0276	2.4	.0945	5.0	.1968	7.8	.3071	14.5	.5708
.75	.0295	2.45	.0965	5.1	.2008	7.9	.3110	15.0	.5906
.8	.0315	2.5	.0984	5.2	.2047	8.0	.3150	15.5	.6102
.85	.0335	2.55	.1004	5.25	.2067	8.1	.3189	16.0	.6300
.9	.0355	2.6	.1024	5.3	.2087	8.2	.3228	16.5	.6496
.95	.0374	2.65	.1043	5.4	.2126	8.25	.3248	17.0	.6693
1.0	.0394	2.7	.1063	5.5	.2165	8.3	.3267	17.5	.6889
1.05	.0413	2.75	.1083	5.6	.2205	8.4	.3307	18.0	.7087
1.1	.0433	2.8	.1102	5.7	.2244	8.5	.3346	18.5	.7283
1.15	.0453	2.9	.1142	5.75	.2264	8.6	.3386	19.0	.7480
1.2	.0472	3.0	.1181	5.8	.2283	8.7	.3425	19.5	.7677
1.25	.0492	3.1	.1220	5.9	.2323	8.75	.3445	20.0	.7874
1.3	.0512	3.2	.1260	6.0	.2362	8.8	.3465	20.5	.8071
1.35	.0531	3.25	.1280	6.1	.2401	8.9	.3504	21.0	.8268
1.4	.0551	3.3	.1299	6.2	.2441	9.0	.3543	21.5	.8465
1.45	.0571	3.4	.1339	6.25	.2461	9.1	.3583	22.0	.8661
1.5	.0591	3.5	.1378	6.3	.2480	9.2	.3622	22.5	.8858
1.55	.0610	3.6	.1417	6.4	.2520	9.25	.3642	23.0	.9055
1.6	.0629	3.7	.1457	6.5	.2559	9.35	.3661	23.5	.9252
1.65	.0650	3.75	.1477	6.6	.2598	9.4	.3701	24.0	.9449
1.7	.0669	3.8	.1496	6.7	.2638	9.5	.3740	24.5	.9646
1.75	.0689	3.9	.1535	6.75	.2658	9.6	.3780	25.0	.9843
1.8	.0709	4.0	.1575	6.8	.2677	9.7	.3819
1.85	.0728	4.1	.1614	6.9	.2716	9.75	.3839
1.9	.0748	4.2	.1654	7.0	.2756	9.8	.3858
1.95	.0768	4.25	.1674	7.1	.2795	9.9	.3898
2.0	.0787	4.3	.1693	7.2	.2835	10.0	.3937