BenchReference / Drill sizes / 7/16″ 7/16″ Drill Bit Decimal inches 0.4375″
Millimeters 11.112 mm
System Fractional inch
In 64ths 28/64″
Nearest equivalents in other systems System Nearest drill Size Difference Metric 11.1 mm 0.4370″ / 11.1 mm −0.012 mm (−0.0005″)
Number (wire gauge) #1 0.2280″ / 5.791 mm −5.321 mm (−0.2095″)
Letter Z 0.4130″ / 10.49 mm −0.622 mm (−0.0245″)
−0.889 mm +0.889 mm 7/16″ 13/32″ −0.794 mm 27/64″ −0.397 mm 29/64″ +0.397 mm 15/32″ +0.794 mm Z −0.622 mm 11.1 mm −0.012 mm ← #1 −5.321 mm tick position = true diameter · fractional neighbors above, equivalents below · window ±0.89 mm
Positive difference = cuts a slightly larger hole than 7/16″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring fractional sizes Drill Decimal in mm vs 7/16″ 13/32″ 0.4063 10.319 −0.794 mm 27/64″ 0.4219 10.716 −0.397 mm 7/16″ 0.4375 11.112 — 29/64″ 0.4531 11.509 +0.397 mm 15/32″ 0.4688 11.906 +0.794 mm
← 27/64″ (smaller) 29/64″ (larger) →
Compare 7/16″ 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 0.4375″. See all data sources .