You can download a (free) program for conversions or use the on line conversion sites at the source page.
4.5 mm = 0.45 cm = 0.0045 m = 0.177 inch = 0.0148 feet = ...
conversion to WHAT?
4.5 millimeters = 0.177165354 inches
4.5 millimeters = 0.0045 meters
4.5 millimeters = 0.45 centimeters
conversion to what?
It is 0.45 cm, or 0.0045 meter or 0.177 inch
