End Mill Size Chart

End mill bits are essential for machinists who need to create precision parts and components. Knowing the standard end mill sizes is important for choosing the right tool for creating those parts. Milling bits come in a variety of diameter and styles to meet the demands of any machining design. The standard bit size range is from .005” to 1.25” in diameter for carbide. Most sizes are generally available from stock, and made in the USA.

The link below is a downloadable chart of the table below. All of these sizes can be searched by clicking on the End Mills page and searching using the filters. Some commom end mill sizes are linked in the below chart to make it easy to find what you are looking for. More links will be added soon.

**End Mill Size Chart - Inch, Metric, And Micro**
Size	Decimal	Category	Size	Decimal	Category	Size	Decimal	Category	Size	Decimal	Category
0.0050	0.0050	Micro	0.0520	0.0520	Micro	0.0980	0.0980	Micro	7/16"	0.4375	Inch
0.0060	0.0060	Micro	0.0530	0.0530	Micro	2.5mm	0.0984	Metric	29/64"	0.4531	Inch
0.0070	0.0070	Micro	0.0540	0.0540	Micro	0.0990	0.0990	Micro	15/32"	0.4688	Inch
0.0080	0.0080	Micro	0.0550	0.0550	Micro	0.1000	0.1000	Micro	12.0mm	0.4724	Metric
0.0090	0.0090	Micro	0.0560	0.0560	Micro	0.1010	0.1010	Micro	31/64"	0.4844	Inch
0.0100	0.0100	Micro	0.0570	0.0570	Micro	0.1020	0.1020	Micro	1/2"	0.5000	Inch
0.0110	0.0110	Micro	0.0580	0.0580	Micro	0.1030	0.1030	Micro	13.0mm	0.5118	Metric
0.0120	0.0120	Micro	0.0590	0.0590	Micro	0.1040	0.1040	Micro	33/64"	0.5156	Inch
0.0130	0.0130	Micro	1.5mm	0.0591	Metric	0.1050	0.1050	Micro	17/32"	0.5313	Inch
0.0140	0.0140	Micro	0.0600	0.0600	Micro	0.1060	0.1060	Micro	35/64"	0.5469	Inch
0.0150	0.0150	Micro	0.0610	0.0610	Micro	0.1070	0.1070	Micro	14.0mm	0.5512	Metric
1/64"	0.0156	Inch	0.0620	0.0620	Micro	0.1080	0.1080	Micro	9/16"	0.5625	Inch
0.0160	0.0160	Micro	1/16"	0.0625	Inch	0.1090	0.1090	Micro	37/64"	0.5781	Inch
0.0170	0.0170	Micro	0.0630	0.0630	Micro	7/64"	0.1094	Inch	15.0mm	0.5906	Metric
0.0180	0.0180	Micro	0.0640	0.0640	Micro	0.1100	0.1100	Micro	19/32"	0.5938	Inch
0.0190	0.0190	Micro	0.0650	0.0650	Micro	0.1150	0.1150	Micro	39/64"	0.6094	Inch
0.0200	0.0200	Micro	0.0660	0.0660	Micro	3.0mm	0.1181	Metric	5/8"	0.6250	Inch
0.0210	0.0210	Micro	0.0670	0.0670	Micro	0.1200	0.1200	Micro	16.0mm	0.6299	Metric
0.0220	0.0220	Micro	0.0680	0.0680	Micro	1/8"	0.1250	Inch	41/64"	0.6406	Inch
0.0230	0.0230	Micro	0.0690	0.0690	Micro	3.5mm	0.1378	Metric	21/32"	0.6563	Inch
0.0240	0.0240	Micro	0.0700	0.0700	Micro	9/64"	0.1406	Inch	17.0mm	0.6693	Metric
0.0250	0.0250	Micro	0.0710	0.0710	Micro	5/32"	0.1563	Inch	43/64"	0.6719	Inch
0.0260	0.0260	Micro	0.0720	0.0720	Micro	4.0mm	0.1575	Metric	11/16"	0.6875	Inch
0.0270	0.0270	Micro	0.0730	0.0730	Micro	11/64"	0.1719	Inch	45/64"	0.7031	Inch
0.0280	0.0280	Micro	0.0740	0.0740	Micro	4.5mm	0.1772	Metric	18.0mm	0.7087	Metric
0.0290	0.0290	Micro	0.0750	0.0750	Micro	3/16"	0.1875	Inch	23/32"	0.7188	Inch
0.0300	0.0300	Micro	0.0760	0.0760	Micro	5.0mm	0.1969	Metric	47/64"	0.7344	Inch
0.0310	0.0310	Micro	0.0770	0.0770	Micro	13/64"	0.2031	Inch	19.0mm	0.7480	Metric
1/32"	0.0313	Inch	0.0780	0.0780	Micro	5.5mm	0.2165	Metric	3/4"	0.7500	Inch
0.0320	0.0320	Micro	5/64"	0.0781	Inch	7/32"	0.2188	Inch	49/64"	0.7656	Inch
0.0330	0.0330	Micro	2.0mm	0.0787	Metric	15/64"	0.2344	Inch	25/32"	0.7813	Inch
0.0340	0.0340	Micro	0.0790	0.0790	Micro	6.0mm	0.2362	Metric	20.0mm	0.7874	Metric
0.0350	0.0350	Micro	0.0800	0.0800	Micro	1/4"	0.2500	Inch	51/64"	0.7969	Inch
0.0360	0.0360	Micro	0.0810	0.0810	Micro	6.5mm	0.2559	Metric	13/16"	0.8125	Inch
0.0370	0.0370	Micro	0.0820	0.0820	Micro	17/64"	0.2656	Inch	21.0mm	0.8268	Metric
0.0380	0.0380	Micro	0.0830	0.0830	Micro	7.0mm	0.2756	Metric	53/64"	0.8281	Inch
0.0390	0.0390	Micro	0.0840	0.0840	Micro	9/32"	0.2813	Inch	27/32"	0.8438	Inch
1.0mm	0.0394	Metric	0.0850	0.0850	Micro	7.5mm	0.2953	Metric	55/64"	0.8594	Inch
0.0400	0.0400	Micro	0.0860	0.0860	Micro	19/64"	0.2969	Inch	22.0mm	0.8661	Metric
0.0410	0.0410	Micro	0.0870	0.0870	Micro	5/16"	0.3125	Inch	7/8"	0.8750	Inch
0.0420	0.0420	Micro	0.0880	0.0880	Micro	8.0mm	0.3150	Metric	57/64"	0.8906	Inch
0.0430	0.0430	Micro	0.0890	0.0890	Micro	21/64"	0.3281	Inch	23.0mm	0.9055	Metric
0.0440	0.0440	Micro	0.0900	0.0900	Micro	11/32"	0.3438	Inch	29/32"	0.9063	Inch
0.0450	0.0450	Micro	0.0910	0.0910	Micro	9.0mm	0.3543	Metric	59/64"	0.9219	Inch
0.0460	0.0460	Micro	0.0920	0.0920	Micro	23/64"	0.3594	Inch	15/16"	0.9375	Inch
3/64"	0.0469	Inch	0.0930	0.0930	Micro	3/8"	0.3750	Inch	24.0mm	0.9449	Metric
0.0470	0.0470	Micro	3/32"	0.0938	Inch	25/64"	0.3906	Inch	61/64"	0.9531	Inch
0.0480	0.0480	Micro	0.0940	0.0940	Micro	10.0mm	0.3937	Metric	31/32"	0.9688	Inch
0.0490	0.0490	Micro	0.0950	0.0950	Micro	13/32"	0.4063	Inch	25.0mm	0.9843	Metric
0.0500	0.0500	Micro	0.0960	0.0960	Micro	27/64"	0.4219	Inch	63/64"	0.9844	Inch
0.0510	0.0510	Micro	0.0970	0.0970	Micro	11.0mm	0.4331	Metric	1"	1.0000	Inch

Common End Mill Sizes

Inch Size	Decimal
.015 End Mill	0.0150
1/32 End Mill	0.0313
1/16 End Mill	0.0625
1/8 End Mill	0.1250
3/16 End Mill	0.1875
1/4 End Mill	0.2500
5/16 End Mill	0.3125
3/8 End Mill	0.3750
1/2 End Mill	0.5000
5/8 End Mill	0.6250
3/4 End Mill	0.7500
1 End Mill	1.0000