BenchReference / Drill sizes / 7/32″ 7/32″ Drill Bit Decimal inches 0.2188″
Millimeters 5.556 mm
System Fractional inch
In 64ths 14/64″
Nearest equivalents in other systems System Nearest drill Size Difference Metric 5.6 mm 0.2205″ / 5.6 mm +0.044 mm (+0.0017″)
Number (wire gauge) #2 0.2210″ / 5.613 mm +0.057 mm (+0.0023″)
Letter A 0.2340″ / 5.944 mm +0.387 mm (+0.0153″)
−0.444 mm +0.444 mm 7/32″ 13/64″ −0.397 mm 15/64″ +0.397 mm 5.6 mm +0.044 mm #2 +0.057 mm A +0.387 mm ← 3/16″ −0.794 mm 1/4″ +0.794 mm → tick position = true diameter · fractional neighbors above, equivalents below · window ±0.44 mm
Positive difference = cuts a slightly larger hole than 7/32″. Sizes
beyond the window are listed with arrows — they are not close substitutes.
Neighboring fractional sizes Drill Decimal in mm vs 7/32″ 3/16″ 0.1875 4.762 −0.794 mm 13/64″ 0.2031 5.159 −0.397 mm 7/32″ 0.2188 5.556 — 15/64″ 0.2344 5.953 +0.397 mm 1/4″ 0.2500 6.35 +0.794 mm
← 13/64″ (smaller) 15/64″ (larger) →
Compare 7/32″ 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 0.2188″. See all data sources .