15/64 Inch to MM
Fractional inch to millimeters
15/64 inch (15/64β³)
5.953125 mm
= 0.595313 cm Β· 0.234375 inch decimal Β· 1 inch = 25.4 mm exactly
π‘ Standard fractional drill bit size. 1/64 in is also the finest graduation printed on a US tape measure.
Also written as
15/64 to mm Β· 15/64 in mm Β· 15/64" in mm Β· 15/64 inch in mm Β· 15/64 inches to millimeters Β· 15/64 en mm Β· 0.234375 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
6 mm
15/64β³ = 5.953125 mm Β· difference 0.0469 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.0469 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 |
|---|
| 13/64β³ | 5.159375 mm | 0.515937 cm | 0.203125β³ |
| 7/32β³ | 5.55625 mm | 0.555625 cm | 0.21875β³ |
| 15/64β³ | 5.953125 mm | 0.595313 cm | 0.234375β³ |
| 1/4β³ | 6.35 mm | 0.635 cm | 0.25β³ |
| 17/64β³ | 6.746875 mm | 0.674687 cm | 0.265625β³ |
15/64β³ is 15/64 of an inch β the 15th mark from zero on a tape measure graduated in sixty-fourths.
FAQ
How many mm is 15/64 inch?
15/64 inch equals 5.953125 mm. One inch is defined as exactly 25.4 mm, so the result is 25.4 Γ 15 Γ· 64.
What is 15/64 inch in decimal?
15/64 inch is 0.234375 inch in decimal, which is 5.953125 mm or 0.595313 cm.
Which metric size is closest to 15/64 inch?
6 mm is the closest common metric size, a difference of 0.0469 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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15/64 inch to mm
15/64 inch is 25.4 Γ 15 Γ· 64 = 5.953125 mm, or 0.595313 cm. In decimal inches it is 0.234375β³. Because the inch is defined as exactly 25.4 millimeters, fractional inch values convert without rounding.
Where this size shows up
Standard fractional drill bit size. 1/64 in is also the finest graduation printed on a US tape measure.
Matching it to metric
The nearest metric drill size is 6 mm, a difference of 0.0469 mm. Whether that matters depends on the job: a clearance hole tolerates it, a press fit or a tapped hole does not. For hex fasteners the same logic applies to socket sizes β a socket even a few tenths oversize will round the corners of the head.