Global Drill Bit Conversion | Imperial to Metric Cross-Over Chart

Global Compatibility
Imperial to Metric Cross-Over Grid

Imperial Size	Decimal (In)	Closest Metric (mm)	Match Quality
#80	.0135	0.35 mm	Closest
1/64	.0156	0.40 mm	Closest
#60	.0400	1.00 mm	Closest
#53	.0595	1.50 mm	Closest
1/16	.0625	1.60 mm	Closest
#31	.1200	3.00 mm	Closest
1/8	.1250	3.175 mm	Exact
#19	.1660	4.20 mm	Closest
#9	.1960	5.00 mm	Closest
Letter A	.2340	6.00 mm	Closest
1/4	.2500	6.35 mm	Exact
Letter J	.2770	7.00 mm	Closest
5/16	.3125	8.00 mm	Closest
Letter V	.3770	9.50 mm	Closest
3/8	.3750	9.525 mm	Exact
25/64	.3906	10.00 mm	Closest
1/2	.5000	12.70 mm	Exact
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