BenchReference / Drill sizes / 1.1 mm 1.1 mm Drill Decimal inches 0.0433″
Millimeters 1.1 mm
System Metric
Nearest equivalents in other systems System Nearest drill Size Difference Fractional inch 3/64″ 0.0469″ / 1.191 mm +0.091 mm (+0.0036″)
Number (wire gauge) #57 0.0430″ / 1.092 mm −0.008 mm (−0.0003″)
Letter A 0.2340″ / 5.944 mm +4.844 mm (+0.1907″)
−0.15 mm +0.15 mm 1.1 mm 1 mm −0.1 mm 1.2 mm +0.1 mm 1.25 mm +0.15 mm #57 −0.008 mm 3/64″ +0.091 mm A +4.844 mm → tick position = true diameter · metric neighbors above, equivalents below · window ±0.15 mm
Positive difference = cuts a slightly larger hole than 1.1 mm. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring metric sizes Drill Decimal in mm vs 1.1 mm 1 mm 0.0394 1 −0.1 mm 1.1 mm 0.0433 1.1 — 1.2 mm 0.0472 1.2 +0.1 mm 1.25 mm 0.0492 1.25 +0.15 mm
← 1 mm (smaller) 1.2 mm (larger) →
Compare 1.1 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 1.1 mm. See all data sources .