BenchReference / Drill sizes / 4.6 mm 4.6 mm Drill Decimal inches 0.1811″
Millimeters 4.6 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 3/16″ 0.1875″ / 4.762 mm +0.162 mm (+0.0064″)
Number (wire gauge) #14 0.1820″ / 4.623 mm +0.023 mm (+0.0009″)
Letter A 0.2340″ / 5.944 mm +1.344 mm (+0.0529″)
−0.368 mm +0.368 mm 4.6 mm 4.4 mm −0.2 mm 4.5 mm −0.1 mm 4.7 mm +0.1 mm 4.8 mm +0.2 mm #14 +0.023 mm 3/16″ +0.162 mm A +1.344 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.37 mm
Positive difference = cuts a slightly larger hole than 4.6 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 4.6 mm 4.4 mm 0.1732 4.4 −0.2 mm 4.5 mm 0.1772 4.5 −0.1 mm 4.6 mm 0.1811 4.6 — 4.7 mm 0.1850 4.7 +0.1 mm 4.8 mm 0.1890 4.8 +0.2 mm
← 4.5 mm (smaller) 4.7 mm (larger) →
Compare 4.6 mm with another size
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 metric size is 4.6 mm. See all data sources .