BenchReference / Drill sizes / 9/16″ 9/16″ Drill Bit Decimal inches 0.5625″
Millimeters 14.287 mm
System Fractional inch
In 64ths 36/64″
Nearest equivalents in other systems System Nearest drill Size Difference Metric 14.5 mm 0.5709″ / 14.5 mm +0.213 mm (+0.0084″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −8.496 mm (−0.3345″)
Letter Z 0.4130″ / 10.49 mm −3.797 mm (−0.1495″)
−1.143 mm +1.143 mm 9/16″ 17/32″ −0.794 mm 35/64″ −0.397 mm 37/64″ +0.397 mm 19/32″ +0.794 mm 14.5 mm +0.213 mm ← #1 −8.496 mm ← Z −3.797 mm tick position = true diameter · fractional neighbors above, equivalents below · window ±1.14 mm
Positive difference = cuts a slightly larger hole than 9/16″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Clearance drill for Neighboring fractional sizes Drill Decimal in mm vs 9/16″ 17/32″ 0.5313 13.494 −0.794 mm 35/64″ 0.5469 13.891 −0.397 mm 9/16″ 0.5625 14.287 — 37/64″ 0.5781 14.684 +0.397 mm 19/32″ 0.5938 15.081 +0.794 mm
← 35/64″ (smaller) 37/64″ (larger) →
Compare 9/16″ 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 0.5625″. See all data sources .