The meter (m) is the base unit of length in the International System of Units, originally defined by the distance light travels in a vacuum in 1/299,792,458 of a second. It serves as the foundation for all metric length measurements and is used in construction, sports, and scientific research worldwide. One meter equals roughly 3.2808 feet or about 1.0936 yards.

The inch (in) is an imperial unit of length equal to exactly 25.4 millimeters, widely used in the United States, Canada, and the United Kingdom. It is the standard measurement for screen sizes, pipe diameters, and mechanical fasteners, and remains common in everyday use across North America. One inch equals exactly 2.54 centimeters.