To convert 1.625 millimeter to inch, multiply by the conversion factor 0.039370. 1.625 x 0.039370 = 0.06397625 inch.

1.625 millimeter equals exactly 0.06397625 inch. For practical purposes, this is often rounded to 0.0640 inch.

Objects measuring approximately 1.625 millimeter include the diameter of a 14 AWG electrical wire (1.628mm), the thickness of a standard FR-4 PCB substrate (1.6mm), and the diameter of a 1/16 inch drill bit (1.5875mm).

Converting millimeter to inch is useful for international collaboration in engineering and manufacturing, adhering to regional standards (e.g., US customary units), and interpreting older technical drawings or specifications.

For quick estimation, remember that 1 millimeter is approximately 0.04 inch. So, 1.625mm is roughly 1.625 x 0.04 = 0.065 inch. For precision, use a calculator with the exact factor 0.039370. Visually, think of it as slightly less than the thickness of a US penny.