Step-by-step conversion explanation: To convert 42.5 millimeter to inch, divide by 0.039370. 42.5 ÷ 0.039370 = 1.6732 inch

42.5 millimeter equals exactly 1.673228346 inch. For practical purposes, this is often rounded to 1.6732 inch.

Objects measuring approximately 42.5 millimeter include a standard golf ball (42.67mm), the body width of a NEMA 17 stepper motor (42.3mm), and the diagonal of a 1.69 inch smartwatch display (approx. 42.9mm).

Converting millimeter to inch is useful for international collaboration in engineering, manufacturing, and trade, especially when working with designs or components from regions primarily using the Imperial system, such as the United States. It ensures compatibility and precision across different measurement standards.

Memory aids and shortcuts for converting 42.5 millimeter to inch include a quick estimation by multiplying by 0.04, yielding approximately 1.7 inches. For a visual reference, consider the diameter of a standard golf ball, which is very close to 42.5 millimeters.