There have been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-end.
Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one.
It is also sometimes used in Japan as well as other countries in relation to electronic parts, like the size of display screens. From: centimeter To: inch. Centimeter to Nautical Mile international. Centimeter to Electron Radius classical. Centimeter to Earth's Equatorial Radius. Centimeter to Earth's Distance From Sun. Kilometers km :. Acres ac :. Hectares ha :. Ounces oz :. Pounds lb :. Tons t :. Milligrams mg :. Grams g :. Kilograms kg :. Metric Tons mt :. Kelvin K :. Upgrade to Dimensions Pro and access additional features and perks throughout the library including: 2D Downloads.
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