MachineCalcs

Finder

Drill Size Finder

Enter a target hole size or search a designation. The finder ranks standard number, letter and fractional twist drills by undersize, closest and oversize fit so you can move from drawing diameter to a shop drill quickly.

Showing nearest standard drills for a 5 mm target.

Nearest drills

#9

Number

Closest
Decimal
0.1960 in
Metric
4.9784 mm

#8

Number

Over
Decimal
0.1990 in
Metric
5.0546 mm

#10

Number

Under
Decimal
0.1935 in
Metric
4.9149 mm

#7

Number

Over
Decimal
0.2010 in
Metric
5.1054 mm

#11

Number

Under
Decimal
0.1910 in
Metric
4.8514 mm

13/64"

Fraction

Over
Decimal
0.2031 in
Metric
5.1594 mm

#6

Number

Over
Decimal
0.2040 in
Metric
5.1816 mm

#12

Number

Under
Decimal
0.1890 in
Metric
4.8006 mm

#5

Number

Over
Decimal
0.2055 in
Metric
5.2197 mm

Nearest is not always the right drill

Use the undersize result for reaming, thread preparation or holes that will be opened later. Use the oversize result for rough clearance only when the drawing tolerance allows it. For thread drill sizing, use the tap drill calculator.