5/8 inch in mm and decimal

5/8 in = 0.625 in = 15.875 mm. Closest metric drill: 16 mm.

Nearby drill sizes

Drill	Type	Inch	mm	Difference
9/16	fraction	.5625 in	14.287	-62.5 thou
37/64	fraction	.5781 in	14.684	-46.9 thou
19/32	fraction	.5938 in	15.081	-31.3 thou
39/64	fraction	.6094 in	15.478	-15.6 thou
5/8	fraction	.6250 in	15.875	0.0 thou
41/64	fraction	.6406 in	16.272	15.6 thou
21/32	fraction	.6563 in	16.669	31.3 thou
43/64	fraction	.6719 in	17.066	46.9 thou
11/16	fraction	.6875 in	17.462	62.5 thou

1 thou = 0.001 in = 0.0254 mm. Drills a few thou apart are usually interchangeable for clearance holes, but not for tap drills or reamer pilots.