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Workshop reference

Drill Size Chart

A compact metric and imperial diameter comparison.

Drill sizeEquivalent
1.0 mm0.0394 in
2.0 mm0.0787 in
3.0 mm0.1181 in
4.0 mm0.1575 in
5.0 mm0.1969 in
6.0 mm0.2362 in
8.0 mm0.3150 in
10.0 mm0.3937 in
12.0 mm0.4724 in
1/2 in12.700 mm

Reference values are general. Confirm the specification, standard and material required for the actual job.