Endmill Size Chart

Size	Decimal (inch)	Metric (mm)	Type
1/64	0.0156	0.40	Fractional
2/64	0.0312	0.79	Fractional
3/64	0.0469	1.19	Fractional
4/64	0.0625	1.59	Fractional
5/64	0.0781	1.98	Fractional
6/64	0.0938	2.38	Fractional
7/64	0.1094	2.78	Fractional
8/64	0.1250	3.17	Fractional
9/64	0.1406	3.57	Fractional
10/64	0.1562	3.97	Fractional
11/64	0.1719	4.37	Fractional
12/64	0.1875	4.76	Fractional
13/64	0.2031	5.16	Fractional
14/64	0.2188	5.56	Fractional
15/64	0.2344	5.95	Fractional
16/64	0.2500	6.35	Fractional
17/64	0.2656	6.75	Fractional
18/64	0.2812	7.14	Fractional
19/64	0.2969	7.54	Fractional
20/64	0.3125	7.94	Fractional
21/64	0.3281	8.33	Fractional
22/64	0.3438	8.73	Fractional
23/64	0.3594	9.13	Fractional
24/64	0.3750	9.52	Fractional
25/64	0.3906	9.92	Fractional
26/64	0.4062	10.32	Fractional
27/64	0.4219	10.72	Fractional
28/64	0.4375	11.11	Fractional
29/64	0.4531	11.51	Fractional
30/64	0.4688	11.91	Fractional
31/64	0.4844	12.30	Fractional
32/64	0.5000	12.70	Fractional
33/64	0.5156	13.10	Fractional
34/64	0.5312	13.49	Fractional
35/64	0.5469	13.89	Fractional
36/64	0.5625	14.29	Fractional
37/64	0.5781	14.68	Fractional
38/64	0.5938	15.08	Fractional
39/64	0.6094	15.48	Fractional
40/64	0.6250	15.88	Fractional
41/64	0.6406	16.27	Fractional
42/64	0.6562	16.67	Fractional
43/64	0.6719	17.07	Fractional
44/64	0.6875	17.46	Fractional
45/64	0.7031	17.86	Fractional
46/64	0.7188	18.26	Fractional
47/64	0.7344	18.65	Fractional
48/64	0.7500	19.05	Fractional
49/64	0.7656	19.45	Fractional
50/64	0.7812	19.84	Fractional
51/64	0.7969	20.24	Fractional
52/64	0.8125	20.64	Fractional
53/64	0.8281	21.03	Fractional
54/64	0.8438	21.43	Fractional
55/64	0.8594	21.83	Fractional
56/64	0.8750	22.22	Fractional
57/64	0.8906	22.62	Fractional
58/64	0.9062	23.02	Fractional
59/64	0.9219	23.42	Fractional
60/64	0.9375	23.81	Fractional
61/64	0.9531	24.21	Fractional
62/64	0.9688	24.61	Fractional
63/64	0.9844	25.00	Fractional
1	1.0000	25.40	Fractional
0.0156"	0.0156	0.40	Decimal
0.0312"	0.0312	0.79	Decimal
0.0469"	0.0469	1.19	Decimal
0.0625"	0.0625	1.59	Decimal
0.0781"	0.0781	1.98	Decimal
0.0938"	0.0938	2.38	Decimal
0.1094"	0.1094	2.78	Decimal
0.1250"	0.1250	3.17	Decimal
0.1406"	0.1406	3.57	Decimal
0.1562"	0.1562	3.97	Decimal
0.1719"	0.1719	4.37	Decimal
0.1875"	0.1875	4.76	Decimal
0.2031"	0.2031	5.16	Decimal
0.2188"	0.2188	5.56	Decimal
0.2344"	0.2344	5.95	Decimal
0.2500"	0.2500	6.35	Decimal
0.2656"	0.2656	6.75	Decimal
0.2812"	0.2812	7.14	Decimal
0.2969"	0.2969	7.54	Decimal
0.3125"	0.3125	7.94	Decimal
0.3281"	0.3281	8.33	Decimal
0.3438"	0.3438	8.73	Decimal
0.3594"	0.3594	9.13	Decimal
0.3750"	0.3750	9.52	Decimal
0.3906"	0.3906	9.92	Decimal
0.4062"	0.4062	10.32	Decimal
0.4219"	0.4219	10.72	Decimal
0.4375"	0.4375	11.11	Decimal
0.4531"	0.4531	11.51	Decimal
0.4688"	0.4688	11.91	Decimal
0.4844"	0.4844	12.30	Decimal
0.5000"	0.5000	12.70	Decimal
0.5156"	0.5156	13.10	Decimal
0.5312"	0.5312	13.49	Decimal
0.5469"	0.5469	13.89	Decimal
0.5625"	0.5625	14.29	Decimal
0.5781"	0.5781	14.68	Decimal
0.5938"	0.5938	15.08	Decimal
0.6094"	0.6094	15.48	Decimal
0.6250"	0.6250	15.88	Decimal
0.6406"	0.6406	16.27	Decimal
0.6562"	0.6562	16.67	Decimal
0.6719"	0.6719	17.07	Decimal
0.6875"	0.6875	17.46	Decimal
0.7031"	0.7031	17.86	Decimal
0.7188"	0.7188	18.26	Decimal
0.7344"	0.7344	18.65	Decimal
0.7500"	0.7500	19.05	Decimal
0.7656"	0.7656	19.45	Decimal
0.7812"	0.7812	19.84	Decimal
0.7969"	0.7969	20.24	Decimal
0.8125"	0.8125	20.64	Decimal
0.8281"	0.8281	21.03	Decimal
0.8438"	0.8438	21.43	Decimal
0.8594"	0.8594	21.83	Decimal
0.8750"	0.8750	22.22	Decimal
0.8906"	0.8906	22.62	Decimal
0.9062"	0.9062	23.02	Decimal
0.9219"	0.9219	23.42	Decimal
0.9375"	0.9375	23.81	Decimal
0.9531"	0.9531	24.21	Decimal
0.9688"	0.9688	24.61	Decimal
0.9844"	0.9844	25.00	Decimal
1.0000"	1.0000	25.40	Decimal
0.1 mm	0.0039	0.10	Metric
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
3.1 mm	0.1220	3.10	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
5.1 mm	0.2008	5.10	Metric
5.2 mm	0.2047	5.20	Metric
5.3 mm	0.2087	5.30	Metric
5.4 mm	0.2126	5.40	Metric
5.5 mm	0.2165	5.50	Metric
5.6 mm	0.2205	5.60	Metric
5.7 mm	0.2244	5.70	Metric
5.8 mm	0.2283	5.80	Metric
5.9 mm	0.2323	5.90	Metric
6.0 mm	0.2362	6.00	Metric
6.1 mm	0.2402	6.10	Metric
6.2 mm	0.2441	6.20	Metric
6.3 mm	0.2480	6.30	Metric
6.4 mm	0.2520	6.40	Metric
6.5 mm	0.2559	6.50	Metric
6.6 mm	0.2598	6.60	Metric
6.7 mm	0.2638	6.70	Metric
6.8 mm	0.2677	6.80	Metric
6.9 mm	0.2717	6.90	Metric
7.0 mm	0.2756	7.00	Metric
7.1 mm	0.2795	7.10	Metric
7.2 mm	0.2835	7.20	Metric
7.3 mm	0.2874	7.30	Metric
7.4 mm	0.2913	7.40	Metric
7.5 mm	0.2953	7.50	Metric
7.6 mm	0.2992	7.60	Metric
7.7 mm	0.3031	7.70	Metric
7.8 mm	0.3071	7.80	Metric
7.9 mm	0.3110	7.90	Metric
8.0 mm	0.3150	8.00	Metric
8.1 mm	0.3189	8.10	Metric
8.2 mm	0.3228	8.20	Metric
8.3 mm	0.3268	8.30	Metric
8.4 mm	0.3307	8.40	Metric
8.5 mm	0.3346	8.50	Metric
8.6 mm	0.3386	8.60	Metric
8.7 mm	0.3425	8.70	Metric
8.8 mm	0.3465	8.80	Metric
8.9 mm	0.3504	8.90	Metric
9.0 mm	0.3543	9.00	Metric
9.1 mm	0.3583	9.10	Metric
9.2 mm	0.3622	9.20	Metric
9.3 mm	0.3661	9.30	Metric
9.4 mm	0.3701	9.40	Metric
9.5 mm	0.3740	9.50	Metric
9.6 mm	0.3780	9.60	Metric
9.7 mm	0.3819	9.70	Metric
9.8 mm	0.3858	9.80	Metric
9.9 mm	0.3898	9.90	Metric
10.0 mm	0.3937	10.00	Metric
10.1 mm	0.3976	10.10	Metric
10.2 mm	0.4016	10.20	Metric
10.3 mm	0.4055	10.30	Metric
10.4 mm	0.4094	10.40	Metric
10.5 mm	0.4134	10.50	Metric
10.6 mm	0.4173	10.60	Metric
10.7 mm	0.4213	10.70	Metric
10.8 mm	0.4252	10.80	Metric
10.9 mm	0.4291	10.90	Metric
11.0 mm	0.4331	11.00	Metric
11.1 mm	0.4370	11.10	Metric
11.2 mm	0.4409	11.20	Metric
11.3 mm	0.4449	11.30	Metric
11.4 mm	0.4488	11.40	Metric
11.5 mm	0.4528	11.50	Metric
11.6 mm	0.4567	11.60	Metric
11.7 mm	0.4606	11.70	Metric
11.8 mm	0.4646	11.80	Metric
11.9 mm	0.4685	11.90	Metric
12.0 mm	0.4724	12.00	Metric
12.1 mm	0.4764	12.10	Metric
12.2 mm	0.4803	12.20	Metric
12.3 mm	0.4843	12.30	Metric
12.4 mm	0.4882	12.40	Metric
12.5 mm	0.4921	12.50	Metric
12.6 mm	0.4961	12.60	Metric
12.7 mm	0.5000	12.70	Metric
12.8 mm	0.5039	12.80	Metric
12.9 mm	0.5079	12.90	Metric
13.0 mm	0.5118	13.00	Metric
13.1 mm	0.5157	13.10	Metric
13.2 mm	0.5197	13.20	Metric
13.3 mm	0.5236	13.30	Metric
13.4 mm	0.5276	13.40	Metric
13.5 mm	0.5315	13.50	Metric
13.6 mm	0.5354	13.60	Metric
13.7 mm	0.5394	13.70	Metric
13.8 mm	0.5433	13.80	Metric
13.9 mm	0.5472	13.90	Metric
14.0 mm	0.5512	14.00	Metric
14.1 mm	0.5551	14.10	Metric
14.2 mm	0.5591	14.20	Metric
14.3 mm	0.5630	14.30	Metric
14.4 mm	0.5669	14.40	Metric
14.5 mm	0.5709	14.50	Metric
14.6 mm	0.5748	14.60	Metric
14.7 mm	0.5787	14.70	Metric
14.8 mm	0.5827	14.80	Metric
14.9 mm	0.5866	14.90	Metric
15.0 mm	0.5906	15.00	Metric
15.1 mm	0.5945	15.10	Metric
15.2 mm	0.5984	15.20	Metric
15.3 mm	0.6024	15.30	Metric
15.4 mm	0.6063	15.40	Metric
15.5 mm	0.6102	15.50	Metric
15.6 mm	0.6142	15.60	Metric
15.7 mm	0.6181	15.70	Metric
15.8 mm	0.6220	15.80	Metric
15.9 mm	0.6260	15.90	Metric
16.0 mm	0.6299	16.00	Metric
16.1 mm	0.6339	16.10	Metric
16.2 mm	0.6378	16.20	Metric
16.3 mm	0.6417	16.30	Metric
16.4 mm	0.6457	16.40	Metric
16.5 mm	0.6496	16.50	Metric
16.6 mm	0.6535	16.60	Metric
16.7 mm	0.6575	16.70	Metric
16.8 mm	0.6614	16.80	Metric
16.9 mm	0.6654	16.90	Metric
17.0 mm	0.6693	17.00	Metric
17.1 mm	0.6732	17.10	Metric
17.2 mm	0.6772	17.20	Metric
17.3 mm	0.6811	17.30	Metric
17.4 mm	0.6850	17.40	Metric
17.5 mm	0.6890	17.50	Metric
17.6 mm	0.6929	17.60	Metric
17.7 mm	0.6969	17.70	Metric
17.8 mm	0.7008	17.80	Metric
17.9 mm	0.7047	17.90	Metric
18.0 mm	0.7087	18.00	Metric
18.1 mm	0.7126	18.10	Metric
18.2 mm	0.7165	18.20	Metric
18.3 mm	0.7205	18.30	Metric
18.4 mm	0.7244	18.40	Metric
18.5 mm	0.7283	18.50	Metric
18.6 mm	0.7323	18.60	Metric
18.7 mm	0.7362	18.70	Metric
18.8 mm	0.7402	18.80	Metric
18.9 mm	0.7441	18.90	Metric
19.0 mm	0.7480	19.00	Metric
19.1 mm	0.7520	19.10	Metric
19.2 mm	0.7559	19.20	Metric
19.3 mm	0.7598	19.30	Metric
19.4 mm	0.7638	19.40	Metric
19.5 mm	0.7677	19.50	Metric
19.6 mm	0.7717	19.60	Metric
19.7 mm	0.7756	19.70	Metric
19.8 mm	0.7795	19.80	Metric
19.9 mm	0.7835	19.90	Metric
20.0 mm	0.7874	20.00	Metric
0.1 mm	0.0039	0.10	Micro
0.2 mm	0.0079	0.20	Micro
0.3 mm	0.0118	0.30	Micro
0.4 mm	0.0157	0.40	Micro
0.5 mm	0.0197	0.50	Micro
0.250"	0.2500	6.35	Roughing
0.375"	0.3750	9.52	Roughing
0.500"	0.5000	12.70	Roughing
0.625"	0.6250	15.88	Roughing
0.750"	0.7500	19.05	Roughing
1.000"	1.0000	25.40	Roughing
6 mm	0.2362	6.00	Roughing
8 mm	0.3150	8.00	Roughing
10 mm	0.3937	10.00	Roughing
12 mm	0.4724	12.00	Roughing
16 mm	0.6299	16.00	Roughing
20 mm	0.7874	20.00	Roughing
0.1250"	0.1250	3.17	LongReach
0.1875"	0.1875	4.76	LongReach
0.2500"	0.2500	6.35	LongReach
0.3750"	0.3750	9.52	LongReach
0.5000"	0.5000	12.70	LongReach
4 mm	0.1575	4.00	LongReach
6 mm	0.2362	6.00	LongReach
8 mm	0.3150	8.00	LongReach
10 mm	0.3937	10.00	LongReach
12 mm	0.4724	12.00	LongReach