There are 12.7 millimeters in 1/2 inch. An inch (in.) is part of the US customary system of measurement, whereas a millimeter (mm.) is part of the SI metric...
Millimeter to Inch Chart. MM. Approximate Size In Fractional Inches. Size In ... slightly less than 1/2 Inch. 0.472. 13mm slightly more than 1/2 Inch. 0.511.1 页
That's the formula that our calculator uses to find that 1/2 inch to millimeters is 12.7 mm. Convert a measurement from SAE to metric or metric to standard SAE...
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