9/32 Inch to MM
Fractional inch to millimeters
9/32 inch (9/32β³)
7.14375 mm
= 0.714375 cm Β· 0.28125 inch decimal Β· 1 inch = 25.4 mm exactly
π‘ Common SAE socket, wrench and drill bit size β thirty-seconds are the usual step between sixteenth-inch sizes.
Also written as
9/32 to mm Β· 9/32 in mm Β· 9/32" in mm Β· 9/32 inch in mm Β· 9/32 inches to millimeters Β· 9/32 en mm Β· 0.28125 inch to mm
All of these mean the same measurement. The double-prime mark (β³) and the plain quote (") both stand for inches, and en mm is simply the French and Spanish wording of the same question.
Closest metric drill size
7 mm
9/32β³ = 7.14375 mm Β· difference 0.1437 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.1437 mm gap is usually invisible in a clearance hole but changes the fit on a press fit or a tapped hole.
Nearby fractional inches
| Fraction | mm | cm | Decimal |
|---|---|---|---|
| 7/32β³ | 5.55625 mm | 0.555625 cm | 0.21875β³ |
| 1/4β³ | 6.35 mm | 0.635 cm | 0.25β³ |
| 9/32β³ | 7.14375 mm | 0.714375 cm | 0.28125β³ |
| 5/16β³ | 7.9375 mm | 0.79375 cm | 0.3125β³ |
| 11/32β³ | 8.73125 mm | 0.873125 cm | 0.34375β³ |
9/32β³ is 18/64 of an inch β the 18th mark from zero on a tape measure graduated in sixty-fourths.
FAQ
How many mm is 9/32 inch?
9/32 inch equals 7.14375 mm. One inch is defined as exactly 25.4 mm, so the result is 25.4 Γ 9 Γ· 32.
What is 9/32 inch in decimal?
9/32 inch is 0.28125 inch in decimal, which is 7.14375 mm or 0.714375 cm.
Which metric size is closest to 9/32 inch?
7 mm is the closest common metric size, a difference of 0.1437 mm. Fractional-inch and metric fasteners are not interchangeable when the gap is more than about 0.2 mm.
Why is the value exact?
The international yard and pound agreement of 1959 fixed the inch at exactly 25.4 mm, so fractional inch conversions terminate rather than repeat.
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