BenchReference

#11 Drill Bit

Decimal inches 0.1910″
Millimeters 4.851 mm
System Number (wire gauge)

Nearest equivalents in other systems

System Nearest drill Size Difference
Metric 4.9 mm 0.1929″ / 4.9 mm +0.049 mm (+0.0019″)
Fractional inch 3/16″ 0.1875″ / 4.762 mm −0.089 mm (−0.0035″)
Letter A 0.2340″ / 5.944 mm +1.092 mm (+0.0430″)
−0.388 mm+0.388 mm#11#13−0.152 mm#12−0.051 mm#10+0.064 mm#9+0.127 mm3/16″−0.089 mm4.9 mm+0.049 mmA +1.092 mm →tick position = true diameter · number neighbors above, equivalents below · window ±0.39 mm
Positive difference = cuts a slightly larger hole than #11. Sizes beyond the window are listed with arrows — they are not close substitutes.

Neighboring number sizes

Drill Decimal in mm vs #11
#13 0.1850 4.699 −0.152 mm
#12 0.1890 4.801 −0.051 mm
#11 0.1910 4.851 —
#10 0.1935 4.915 +0.064 mm
#9 0.1960 4.978 +0.127 mm
Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). Millimeter and inch values are converted with the exact definition 1 in = 25.4 mm; the canonical dimension for this number size is 0.1910″. See all data sources.