49/64 Inch to MM
Fractional inch to millimeters
49/64 inch (49/64β³)
19.446875 mm
= 1.944687 cm Β· 0.765625 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
49/64 to mm Β· 49/64 in mm Β· 49/64" in mm Β· 49/64 inch in mm Β· 49/64 inches to millimeters Β· 49/64 en mm Β· 0.765625 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
49/64β³ = 19.446875 mm Β· difference 0.4469 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.4469 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 |
|---|---|---|---|
| 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 |
| 25/32β³ | 19.84375 mm | 1.984375 cm | 0.78125β³ |
| 51/64β³ | 20.240625 mm | 2.024063 cm | 0.796875β³ |
49/64β³ is 49/64 of an inch β the 49th mark from zero on a tape measure graduated in sixty-fourths.
FAQ
How many mm is 49/64 inch?
49/64 inch equals 19.446875 mm. One inch is defined as exactly 25.4 mm, so the result is 25.4 Γ 49 Γ· 64.
What is 49/64 inch in decimal?
49/64 inch is 0.765625 inch in decimal, which is 19.446875 mm or 1.944687 cm.
Which metric size is closest to 49/64 inch?
19 mm is the closest common metric size, a difference of 0.4469 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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