Inchs converter

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. Definition: A foot symbol: ft is a unit of length in the imperial and US customary systems of measurement.

A foot was defined as exactly 0. One foot contains 12 inches, and one yard is comprised of three feet. Use of the inch can be traced back as far as the 7th century.

The first explicit definition we could find of its length was after when it was defined as the length of three barleycorns. This was not a satisfactory reference as barleycorn lengths vary naturally. The British Standards Institute defined the inch as Because the values were so close, and because Britain has already settled on that value, the ASA adopted this value on March 13, 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. Definition: A centimeter symbol: cm is a unit of length in the International System of Units SI , the current form of the metric system.

Metric prefixes range from factors of 10 to 10 18 based on a decimal system, with the base in this case the meter having no prefix and having a factor of 1.