BenchReference / Drill sizes / 23/32″ 23/32″ Drill Bit Decimal inches 0.7188″
Millimeters 18.256 mm
System Fractional inch
In 64ths 46/64″
Nearest equivalents in other systems System Nearest drill Size Difference Metric 18.5 mm 0.7283″ / 18.5 mm +0.244 mm (+0.0096″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −12.465 mm (−0.4907″)
Letter Z 0.4130″ / 10.49 mm −7.766 mm (−0.3057″)
−1.46 mm +1.46 mm 23/32″ 11/16″ −0.794 mm 45/64″ −0.397 mm 47/64″ +0.397 mm 3/4″ +0.794 mm 18.5 mm +0.244 mm ← #1 −12.465 mm ← Z −7.766 mm tick position = true diameter · fractional neighbors above, equivalents below · window ±1.46 mm
Positive difference = cuts a slightly larger hole than 23/32″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring fractional sizes Drill Decimal in mm vs 23/32″ 11/16″ 0.6875 17.462 −0.794 mm 45/64″ 0.7031 17.859 −0.397 mm 23/32″ 0.7188 18.256 — 47/64″ 0.7344 18.653 +0.397 mm 3/4″ 0.7500 19.05 +0.794 mm
← 45/64″ (smaller) 47/64″ (larger) →
Compare 23/32″ 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 fractional size is 0.7188″. See all data sources .