5/8 Inch to MM
Fractional inch to millimeters
5/8 inch (5/8β³)
15.875 mm
= 1.5875 cm Β· 1 inch = 25.4 mm exactly
π‘ Commonly used for AC lines, hydraulic hose.
Nearby fractional inches
| Fraction | mm | cm |
|---|---|---|
| 1/2β³ | 12.7 mm | 1.27 cm |
| 9/16β³ | 14.2875 mm | 1.4287 cm |
| 5/8β³ | 15.875 mm | 1.5875 cm |
| 11/16β³ | 17.4625 mm | 1.7462 cm |
| 3/4β³ | 19.05 mm | 1.905 cm |
Also written as
5/8 to mm Β· 5/8 in mm Β· 5/8" in mm Β· 5/8 inch in mm Β· 5/8 inches to millimeters Β· 5/8 en mm Β· 0.625 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
5/8β³ = 15.875 mm Β· difference 0.125 mm
Metric drills step in 0.5 mm, so a fractional inch size rarely lands exactly on one. A 0.125 mm gap is usually invisible in a clearance hole but changes the fit on a press fit or a tapped hole.
FAQ
How many mm is 5/8 inch?
5/8 inch equals 15.875 mm. Since one inch is defined as exactly 25.4 mm, the result is 25.4 Γ 5 Γ· 8.
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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