BenchReference / Drill sizes / 1/32″ 1/32″ Drill Bit Decimal inches 0.0313″
Millimeters 0.794 mm
System Fractional inch
In 64ths 2/64″
Nearest equivalents in other systems System Nearest drill Size Difference Metric 1 mm 0.0394″ / 1 mm +0.206 mm (+0.0081″)
Number (wire gauge) #68 0.0310″ / 0.787 mm −0.006 mm (−0.0002″)
Letter A 0.2340″ / 5.944 mm +5.15 mm (+0.2028″)
−0.15 mm +0.15 mm 1/32″ #68 −0.006 mm ← 1/64″ −0.397 mm 3/64″ +0.397 mm → 1/16″ +0.794 mm → tick position = true diameter · fractional neighbors above, equivalents below · window ±0.15 mm
Positive difference = cuts a slightly larger hole than 1/32″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring fractional sizes Drill Decimal in mm vs 1/32″ 1/64″ 0.0156 0.397 −0.397 mm 1/32″ 0.0313 0.794 — 3/64″ 0.0469 1.191 +0.397 mm 1/16″ 0.0625 1.587 +0.794 mm
← 1/64″ (smaller) 3/64″ (larger) →
Compare 1/32″ 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 0.0313″. See all data sources .