41/64 Inch to MM
Fractional inch to millimeters
41/64 inch (41/64β³)
16.271875 mm
= 1.627188 cm Β· 0.640625 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
41/64 to mm Β· 41/64 in mm Β· 41/64" in mm Β· 41/64 inch in mm Β· 41/64 inches to millimeters Β· 41/64 en mm Β· 0.640625 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
16 mm
41/64β³ = 16.271875 mm Β· difference 0.2719 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.2719 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 |
|---|---|---|---|
| 39/64β³ | 15.478125 mm | 1.547813 cm | 0.609375β³ |
| 5/8β³ | 15.875 mm | 1.5875 cm | 0.625β³ |
| 41/64β³ | 16.271875 mm | 1.627188 cm | 0.640625β³ |
| 21/32β³ | 16.66875 mm | 1.666875 cm | 0.65625β³ |
| 43/64β³ | 17.065625 mm | 1.706562 cm | 0.671875β³ |
41/64β³ is 41/64 of an inch β the 41st mark from zero on a tape measure graduated in sixty-fourths.
FAQ
How many mm is 41/64 inch?
41/64 inch equals 16.271875 mm. One inch is defined as exactly 25.4 mm, so the result is 25.4 Γ 41 Γ· 64.
What is 41/64 inch in decimal?
41/64 inch is 0.640625 inch in decimal, which is 16.271875 mm or 1.627188 cm.
Which metric size is closest to 41/64 inch?
16 mm is the closest common metric size, a difference of 0.2719 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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