47/64 Inch to MM
Fractional inch to millimeters
47/64 inch (47/64β³)
18.653125 mm
= 1.865312 cm Β· 0.734375 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
47/64 to mm Β· 47/64 in mm Β· 47/64" in mm Β· 47/64 inch in mm Β· 47/64 inches to millimeters Β· 47/64 en mm Β· 0.734375 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
19 mm
47/64β³ = 18.653125 mm Β· difference 0.3469 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.3469 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 |
|---|---|---|---|
| 45/64β³ | 17.859375 mm | 1.785937 cm | 0.703125β³ |
| 23/32β³ | 18.25625 mm | 1.825625 cm | 0.71875β³ |
| 47/64β³ | 18.653125 mm | 1.865312 cm | 0.734375β³ |
| 3/4β³ | 19.05 mm | 1.905 cm | 0.75β³ |
| 49/64β³ | 19.446875 mm | 1.944687 cm | 0.765625β³ |
47/64β³ is 47/64 of an inch β the 47th mark from zero on a tape measure graduated in sixty-fourths.
FAQ
How many mm is 47/64 inch?
47/64 inch equals 18.653125 mm. One inch is defined as exactly 25.4 mm, so the result is 25.4 Γ 47 Γ· 64.
What is 47/64 inch in decimal?
47/64 inch is 0.734375 inch in decimal, which is 18.653125 mm or 1.865312 cm.
Which metric size is closest to 47/64 inch?
19 mm is the closest common metric size, a difference of 0.3469 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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