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Jobber Length Drill Bit Chart

Jobber Length Drill Bits are standard size drill bits.

They come in a wide range of sizes, finishes and materials such as High Speed Steel, Cobalt and Solid Carbide.

Jobber length drill bits' flute length and overall length are dependant on the diamater of the drill bit. See the chart below for these specifications.

 

Fractional Sizes	Decimal Equivalent (Inches)	Flute Length (Inches)	Overall Length (Inches)
1/64”	0.0156	3/16”	3/4”
1/32”	0.0312	1/2”	1-3/8”
3/64”	0.0469	3/4”	1-3/4”
1/16”	0.0625	7/8”	1-7/8”
5/64”	0.0781	1”	2”
3/32”	0.0938	1-1/4”	2-1/4”
7/64”	0.1094	1-1/2”	2-5/8”
1/8”	0.125	1-5/8”	2-3/4”
9/64”	0.1406	1-3/4”	2-7/8”
5/32”	0.1562	2”	3-1/8”
11/64”	0.1719	2-1/8”	3-1/4”
3/16”	0.1875	2-5/16”	3-1/2”
13/64”	0.2031	2-7/16”	3-5/8”
7/32”	0.2188	2-1/2”	3-3/4”
15/64”	0.2344	2-5/8”	3-7/8”
1/4”	0.25	2-3/4”	4”
17/64”	0.2656	2-7/8”	4-1/8”
9/32”	0.2812	2-15/16”	4-1/4”
19/64”	0.2969	3-1/16”	4-3/8”
5/16”	0.3125	3-3/16”	4-1/2”
21/64”	0.3281	3-5/16”	4-5/8”
11/32”	0.3438	3-7/16”	4-3/4”
23/64”	0.3594	3-1/2”	4-7/8”
3/8”	0.375	3-5/8”	5”
25/64”	0.3906	3-3/4”	5-1/8”
13/32”	0.4062	3-7/8”	5-1/4”
27/64”	0.4219	3-15/16”	5-3/8”
7/16”	0.4375	4-1/16”	5-1/2”
29/64”	0.4531	4-3/16”	5-5/8”
15/32”	0.4688	4-5/16”	5-3/4”
31/64”	0.4844	4-3/8”	5-7/8”
1/2”	0.5	4-1/2”	6”
33/64”	0.5156	4-13/16”	6-5/8”
17/32”	0.5312	4-13/16”	6-5/8”
35/64”	0.5469	4-13/16”	6-5/8”
9/16”	0.5625	4-13/16”	6-5/8”
37/64”	0.5781	4-13/16”	6-5/8”
19/32”	0.5938	5-3/16”	7-1/8”
39/64”	0.6094	5-3/16”	7-1/8”
5/8”	0.625	5-3/16”	7-1/8”
41/64”	0.6406	5-3/16”	7-1/8”
21/32”	0.6562	5-3/16”	7-1/8”
43/64”	0.6719	5-5/8”	7-5/8”
11/16”	0.6875	5-5/8”	7-5/8”
Letter Sizes	Decimal Equivalent (Inches)	Flute Length (Inches)	Overall Length (Inches)
A	0.234	2-5/8”	3-7/8”
B	0.238	2-3/4”	4”
C	0.242	2-3/4”	4”
D	0.246	2-3/4”	4”
E	0.25	2-3/4”	4”
F	0.257	2-7/8”	4-1/8”
G	0.261	2-7/8”	4-1/8”
H	0.266	2-7/8”	4-1/8”
I	0.272	2-7/8”	4-1/8”
J	0.277	2-7/8”	4-1/8”
K	0.281	2-15/16”	4-1/4”
L	0.29	2-15/16”	4-1/4”
M	0.295	3-1/16”	4-3/8”
N	0.302	3-1/16”	4-3/8”
O	0.316	3-3/16”	4-1/2”
P	0.323	3-5/16”	4-5/8”
Q	0.332	3-7/16”	4-3/4”
R	0.339	3-7/16”	4-3/4”
S	0.348	3-1/2”	4-7/8”
T	0.358	3-1/2”	4-7/8”
U	0.368	3-5/8”	5”
V	0.377	3-5/8”	5”
W	0.386	3-3/4”	5-1/8”
X	0.397	3-3/4”	5-1/8”
Y	0.404	3-7/8”	5-1/4”
Z	0.413	3-7/8”	5-1/4”
Wire Sizes	Decimal Equivalent (Inches)	Flute Length (Inches)	Overall Length (Inches)
1	0.228	2-5/8”	3-7/8”
2	0.221	2-5/8”	3-7/8”
3	0.213	2-1/2”	3-3/4”
4	0.209	2-1/2”	3-3/4”
5	0.2055	2-1/2”	3-3/4”
6	0.204	2-1/2”	3-3/4”
7	0.201	2-7/16”	3-5/8”
8	0.199	2-7/16”	3-5/8”
9	0.196	2-7/16”	3-5/8”
10	0.1935	2-7/16”	3-5/8”
11	0.191	2-5/16”	3-1/2”
12	0.189	2-5/16”	3-1/2”
13	0.185	2-5/16”	3-1/2”
14	0.182	2-3/16”	3-3/8”
15	0.18	2-3/16”	3-3/8”
16	0.177	2-3/16”	3-3/8”
17	0.173	2-3/16”	3-3/8”
18	0.1695	2-1/8”	3-1/4”
19	0.166	2-1/8”	3-1/4”
20	0.161	2-1/8”	3-1/4”
21	0.159	2-1/8”	3-1/4”
22	0.157	2”	3-1/8”
23	0.154	2”	3-1/8”
24	0.152	2”	3-1/8”
25	0.1495	1-7/8”	3”
26	0.147	1-7/8”	3”
27	0.144	1-7/8”	3”
28	0.1405	1-3/4”	2-7/8”
29	0.136	1-3/4”	2-7/8”
30	0.1285	1-5/8”	2-3/4”
31	0.12	1-5/8”	2-3/4”
32	0.116	1-5/8”	2-3/4”
33	0.113	1-1/2”	2-5/8”
34	0.111	1-1/2”	2-5/8”
35	0.11	1-1/2”	2-5/8”
36	0.1065	1-7/16”	2-1/2”
37	0.104	1-7/16”	2-1/2”
38	0.1015	1-7/16”	2-1/2”
39	0.0995	1-3/8”	2-3/8”
40	0.098	1-3/8”	2-3/8”
41	0.096	1-3/8”	2-3/8”
42	0.0935	1-1/4”	2-1/4”
43	0.089	1-1/4”	2-1/4”
44	0.086	1-1/8”	2-1/8”
45	0.082	1-1/8”	2-1/8”
46	0.081	1-1/8”	2-1/8”
47	0.0785	1”	2”
48	0.076	1”	2”
49	0.073	1”	2”
50	0.07	1”	2”
51	0.067	1”	2”
52	0.0635	7/8”	1-7/8”
53	0.0595	7/8”	1-7/8”
54	0.055	7/8”	1-7/8”
55	0.052	7/8”	1-7/8”
56	0.0465	3/4”	1-3/4”
57	0.043	3/4”	1-3/4”
58	0.042	11/16”	1-5/8”
59	0.041	11/16”	1-5/8”
60	0.04	11/16”	1-5/8”
61	0.039	11/16”	1-5/8”
62	0.038	5/8”	1-1/2”
63	0.037	5/8”	1-1/2”
64	0.036	5/8”	1-1/2”
65	0.035	5/8”	1-1/2”
66	0.033	1/2”	1-3/8”
67	0.032	1/2”	1-3/8”
68	0.031	1/2”	1-3/8”
69	0.0292	1/2”	1-3/8”
70	0.028	3/8”	1-1/4”
71	0.026	3/8”	1-1/4”
72	0.025	5/16”	1-1/8”
73	0.024	5/16”	1-1/8”
74	0.0225	1/4”	1”
75	0.021	1/4”	1”
76	0.02	3/16”	7/8”
77	0.018	3/16”	7/8”
78	0.016	3/16”	7/8”
79	0.0145	1/8”	3/4”
80	0.0135	1/8”	3/4”
Metric Sizes	Decimal Equivalent (Inches)	Flute Length (mm)	Overall Length (mm)
0.3mm	0.0118	3mm	19mm
0.35mm	0.0138	3mm	19mm
0.4mm	0.0157	5mm	20mm
0.45mm	0.0177	5mm	20mm
0.5mm	0.0197	5mm	22mm
0.55mm	0.0217	6mm	24mm
0.6mm	0.0236	8mm	24mm
0.65mm	0.0256	10mm	26mm
0.7mm	0.0276	10mm	28mm
0.75mm	0.0295	13mm	28mm
0.8mm	0.0315	13mm	30mm
0.85mm	0.0335	16mm	30mm
0.9mm	0.0354	16mm	32mm
0.95mm	0.0374	16mm	32mm
1mm	0.0394	17mm	34mm
1.05mm	0.0413	17mm	34mm
1.1mm	0.0433	19mm	36mm
1.15mm	0.0453	19mm	36mm
1.2mm	0.0472	22mm	38mm
1.25mm	0.0492	22mm	38mm
1.3mm	0.0512	22mm	38mm
1.35mm	0.0531	22mm	40mm
1.4mm	0.0551	22mm	40mm
1.45mm	0.0571	22mm	40mm
1.5mm	0.0591	22mm	40mm
1.55mm	0.061	22mm	43mm
1.6mm	0.063	22mm	43mm
1.65mm	0.065	25mm	43mm
1.7mm	0.0669	25mm	43mm
1.75mm	0.0689	25mm	46mm
1.8mm	0.0709	25mm	46mm
1.85mm	0.0728	25mm	46mm
1.9mm	0.0748	25mm	46mm
1.95mm	0.0768	25mm	49mm
2mm	0.0787	25mm	49mm
2.05mm	0.0807	29mm	49mm
2.1mm	0.0827	29mm	49mm
2.15mm	0.0846	29mm	53mm
2.2mm	0.0866	32mm	53mm
2.25mm	0.0886	32mm	53mm
2.3mm	0.0906	32mm	53mm
2.35mm	0.0925	32mm	53mm
2.4mm	0.0945	35mm	57mm
2.45mm	0.0965	35mm	57mm
2.5mm	0.0984	35mm	57mm
2.55mm	0.1003	35mm	57mm
2.6mm	0.1024	37mm	57mm
2.65mm	0.1043	37mm	57mm
2.7mm	0.1063	37mm	61mm
2.75mm	0.1083	37mm	61mm
2.8mm	0.1102	38mm	61mm
2.85mm	0.1122	38mm	61mm
2.9mm	0.1142	41mm	61mm
2.95mm	0.1161	41mm	61mm
3mm	0.1181	41mm	61mm
3.05mm	0.1201	41mm	65mm
3.1mm	0.122	41mm	65mm
3.15mm	0.124	41mm	65mm
3.2mm	0.126	41mm	65mm
3.25mm	0.128	41mm	65mm
3.3mm	0.1299	44mm	65mm
3.35mm	0.1319	44mm	70mm
3.4mm	0.1339	44mm	70mm
3.45mm	0.1358	44mm	70mm
3.5mm	0.1378	44mm	70mm
3.55mm	0.1397	48mm	70mm
3.6mm	0.1417	48mm	70mm
3.65mm	0.1437	48mm	70mm
3.7mm	0.1457	48mm	70mm
3.75mm	0.1476	48mm	75mm
3.8mm	0.1496	48mm	75mm
3.85mm	0.1516	51mm	75mm
3.9mm	0.1535	51mm	75mm
3.95mm	0.1555	51mm	75mm
4mm	0.1575	54mm	75mm
4.05mm	0.1594	54mm	75mm
4.1mm	0.1614	54mm	75mm
4.2mm	0.1654	54mm	75mm
4.25mm	0.1673	54mm	80mm
4.3mm	0.1693	54mm	80mm
4.35mm	0.1713	54mm	80mm
4.4mm	0.1732	56mm	80mm
4.5mm	0.1772	56mm	80mm
4.6mm	0.1811	56mm	80mm
4.65mm	0.1831	56mm	80mm
4.7mm	0.185	59mm	80mm
4.75mm	0.187	59mm	86mm
4.8mm	0.189	59mm	86mm
4.85mm	0.1909	62mm	86mm
4.9mm	0.1929	62mm	86mm
5mm	0.1969	62mm	86mm
5.1mm	0.2008	62mm	86mm
5.2mm	0.2047	64mm	86mm
5.25mm	0.2067	64mm	86mm
5.3mm	0.2087	64mm	86mm
5.4mm	0.2126	64mm	93mm
5.5mm	0.2165	64mm	93mm
5.6mm	0.2205	67mm	93mm
5.7mm	0.2244	67mm	93mm
5.75mm	0.2264	67mm	93mm
5.8mm	0.2283	67mm	93mm
5.9mm	0.2323	67mm	93mm
6mm	0.2362	70mm	93mm
6.1mm	0.2402	70mm	101mm
6.2mm	0.2441	70mm	101mm
6.25mm	0.2461	70mm	101mm
6.3mm	0.248	70mm	101mm
6.4mm	0.252	73mm	101mm
6.5mm	0.2559	73mm	101mm
6.6mm	0.2598	73mm	101mm
6.7mm	0.2638	73mm	101mm
6.75mm	0.2657	73mm	109mm
6.8mm	0.2677	73mm	109mm
6.9mm	0.2717	73mm	109mm
7mm	0.2756	73mm	109mm
7.1mm	0.2795	75mm	109mm
7.2mm	0.2835	75mm	109mm
7.25mm	0.2854	75mm	109mm
7.3mm	0.2874	75mm	109mm
7.4mm	0.2913	78mm	109mm
7.5mm	0.2953	78mm	109mm
7.6mm	0.2992	78mm	117mm
7.7mm	0.3031	81mm	117mm
7.75mm	0.3051	81mm	117mm
7.8mm	0.3071	81mm	117mm
7.9mm	0.311	81mm	117mm
8mm	0.315	81mm	117mm
8.1mm	0.3189	84mm	117mm
8.2mm	0.3228	84mm	117mm
8.25mm	0.3248	84mm	117mm
8.3mm	0.3268	84mm	117mm
8.4mm	0.3307	87mm	117mm
8.5mm	0.3346	87mm	117mm
8.6mm	0.3386	87mm	125mm
8.7mm	0.3425	87mm	125mm
8.75mm	0.3445	87mm	125mm
8.8mm	0.3465	89mm	125mm
8.9mm	0.3504	89mm	125mm
9mm	0.3543	89mm	125mm
9.1mm	0.3583	89mm	125mm
9.2mm	0.3622	92mm	125mm
9.25mm	0.3642	92mm	125mm
9.3mm	0.3661	92mm	125mm
9.4mm	0.3701	92mm	125mm
9.5mm	0.374	92mm	125mm
9.6mm	0.378	95mm	133mm
9.7mm	0.3819	95mm	133mm
9.75mm	0.3839	95mm	133mm
9.8mm	0.3858	95mm	133mm
9.9mm	0.3898	95mm	133mm
10mm	0.3937	95mm	133mm
10.2mm	0.4016	98mm	133mm
10.25mm	0.4035	98mm	133mm
10.5mm	0.4134	98mm	133mm
10.7mm	0.4213	100mm	142mm
10.75mm	0.4232	101mm	142mm
10.8mm	0.4252	103mm	142mm
11mm	0.4331	103mm	142mm
11.5mm	0.4528	106mm	142mm
11.7mm	0.4606	110mm	142mm
12mm	0.4724	111mm	151mm
12.5mm	0.4921	114mm	151mm
12.8mm	0.5039	114mm	151mm
13mm	0.5118	114mm	151mm
13.5mm	0.5315	122mm	160mm
14mm	0.5512	122mm	160mm
14.5mm	0.5709	122mm	169mm
15mm	0.5906	132mm	169mm
15.5mm	0.6102	132mm	178mm
16mm	0.6299	132mm	178mm
16.5mm	0.6496	132mm	184mm
17mm	0.6693	143mm	184mm
17.5mm	0.689	143mm	191mm
18mm	0.7087	145mm	191mm
18.5mm	0.7283	149mm	198mm
19mm	0.748	149mm	198mm
19.5mm	0.7677	154mm	205mm
20mm	0.7874	154mm	205mm