To convert 1.02 millimeter to inch, multiply by the conversion factor 0.039370. 1.02 mm x 0.039370 = 0.0401574 inch.

1.02 millimeter equals exactly 0.0401574 inch. For practical applications, this is often rounded to 0.0402 inch.

Objects approximately 1.02 millimeter include the length of an SMD 0402 electronic component, the diameter of an 18 AWG electrical wire (1.024 mm), or the thickness of a 0.040 inch feeler gauge blade (1.016 mm).

Converting millimeter to inch is essential for interoperability in global manufacturing, especially when working with designs or components from countries primarily using imperial units (e.g., United States). It ensures precision in engineering, assembly, and quality control across different measurement systems.

A simple mental shortcut is to remember that 1 millimeter is approximately 0.04 inch. For 1.02 millimeter, think slightly more than 0.04 inch. Visualizing an 18 AWG electrical wire or an 0402 SMD component can also serve as a practical reference.