BenchReference / Drill sizes / 5/64″ 5/64″ Drill Bit Decimal inches 0.0781″
Millimeters 1.984 mm
System Fractional inch
Nearest equivalents in other systems System Nearest drill Size Difference Metric 2 mm 0.0787″ / 2 mm +0.016 mm (+0.0006″)
Number (wire gauge) #47 0.0785″ / 1.994 mm +0.01 mm (+0.0004″)
Letter A 0.2340″ / 5.944 mm +3.959 mm (+0.1559″)
−0.159 mm +0.159 mm 5/64″ #47 +0.01 mm 2 mm +0.016 mm ← 3/64″ −0.794 mm ← 1/16″ −0.397 mm 3/32″ +0.397 mm → 7/64″ +0.794 mm → tick position = true diameter · fractional neighbors above, equivalents below · window ±0.16 mm
Positive difference = cuts a slightly larger hole than 5/64″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring fractional sizes Drill Decimal in mm vs 5/64″ 3/64″ 0.0469 1.191 −0.794 mm 1/16″ 0.0625 1.587 −0.397 mm 5/64″ 0.0781 1.984 — 3/32″ 0.0938 2.381 +0.397 mm 7/64″ 0.1094 2.778 +0.794 mm
← 1/16″ (smaller) 3/32″ (larger) →
Compare 5/64″ 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 0.0781″. See all data sources .